{"id":2135,"date":"2026-04-23T14:41:09","date_gmt":"2026-04-23T06:41:09","guid":{"rendered":"http:\/\/www.preluna.xyz\/?p=2135"},"modified":"2026-04-23T14:41:11","modified_gmt":"2026-04-23T06:41:11","slug":"%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%81%8d%e5%8e%86%e5%ad%97%e5%85%b8%e7%bb%9f%e8%ae%a1%e9%a2%91%e6%ac%a1","status":"publish","type":"post","link":"http:\/\/www.preluna.xyz\/index.php\/2026\/04\/23\/%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%81%8d%e5%8e%86%e5%ad%97%e5%85%b8%e7%bb%9f%e8%ae%a1%e9%a2%91%e6%ac%a1\/preluna\/text\/","title":{"rendered":"\u5b57\u7b26\u4e32\u904d\u5386+\u5b57\u5178\u7edf\u8ba1\u9891\u6b21"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/\u5b57\u7b26\u4e32\u904d\u5386\u5b57\u5178\u7edf\u8ba1\u9891\u6b21-893x1024.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"893\" height=\"1024\" data-original=\"http:\/\/www.preluna.xyz\/wp-content\/uploads\/2026\/04\/\u5b57\u7b26\u4e32\u904d\u5386\u5b57\u5178\u7edf\u8ba1\u9891\u6b21-893x1024.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2136\"  sizes=\"auto, (max-width: 893px) 100vw, 893px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u9898\u76ee\u8003\u70b9<\/h2>\n\n\n\n<p>\u8fd9\u9053\u9898\u4e3b\u8981\u8003\u8fd9\u51e0\u4e2a\u77e5\u8bc6\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5b57\u7b26\u4e32\u904d\u5386<\/li>\n\n\n\n<li>\u5b57\u5178\u7edf\u8ba1\u9891\u6b21<\/li>\n\n\n\n<li>\u6392\u5e8f\u89c4\u5219\u8bbe\u8ba1<\/li>\n\n\n\n<li>\u6309\u8981\u6c42\u8f93\u51fa\u7ed3\u679c<\/li>\n<\/ol>\n\n\n\n<p>\u8fd9\u9898\u7684\u6838\u5fc3\u5176\u5b9e\u5c31\u4e00\u53e5\u8bdd\uff1a<\/p>\n\n\n\n<p><strong>\u5148\u7edf\u8ba1\u6bcf\u4e2a\u5b57\u7b26\u51fa\u73b0\u4e86\u51e0\u6b21\uff0c\u518d\u6309\u7167\u201c\u6b21\u6570\u964d\u5e8f\u3001\u5b57\u6bcd\u5347\u5e8f\u201d\u6392\u5e8f\uff0c\u6700\u540e\u53d6\u524d\u4e09\u4e2a\u3002<\/strong><\/p>\n\n\n\n<p>\u6240\u4ee5\u5b83\u4e0d\u662f\u4e00\u9053\u201c\u96be\u5728\u8bed\u6cd5\u201d\u7684\u9898\uff0c\u800c\u662f\u4e00\u9053\u5f88\u5178\u578b\u7684\u201c\u5148\u628a\u9898\u610f\u7ffb\u8bd1\u6210\u6b65\u9aa4\u201d\u7684\u9898\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5ba1\u9898<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u8f93\u5165\u662f\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u8f93\u5165\u53ea\u6709\u4e00\u884c\uff0c\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32 <code>s<\/code>\uff0c\u5168\u90e8\u7531\u5c0f\u5199\u5b57\u6bcd\u7ec4\u6210\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>aabbbccde\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u8f93\u51fa\u662f\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u8f93\u51fa\u51fa\u73b0\u6b21\u6570\u6700\u591a\u7684 3 \u4e2a\u5b57\u7b26\uff0c\u6bcf\u4e2a\u5b57\u7b26\u548c\u5b83\u7684\u51fa\u73b0\u6b21\u6570\u5360\u4e00\u884c\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>b 3\na 2\nc 2\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u9898\u76ee\u8981\u6c42\u6211\u4eec\u7279\u522b\u6ce8\u610f\u4ec0\u4e48<\/h3>\n\n\n\n<p>\u8fd9\u91cc\u6709\u4e24\u4e2a\u6392\u5e8f\u89c4\u5219\uff1a<\/p>\n\n\n\n<p>\u7b2c\u4e00\u5c42\u89c4\u5219\uff1a\u6309\u51fa\u73b0\u6b21\u6570\u4ece\u5927\u5230\u5c0f\u6392\u3002<br>\u7b2c\u4e8c\u5c42\u89c4\u5219\uff1a\u5982\u679c\u51fa\u73b0\u6b21\u6570\u4e00\u6837\uff0c\u6309\u5b57\u6bcd\u8868\u987a\u5e8f\u6392\u3002<\/p>\n\n\n\n<p>\u8fd9\u53e5\u8bdd\u975e\u5e38\u5173\u952e\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>a<\/code> \u51fa\u73b0 2 \u6b21<\/li>\n\n\n\n<li><code>c<\/code> \u4e5f\u51fa\u73b0 2 \u6b21<\/li>\n<\/ul>\n\n\n\n<p>\u90a3\u4e48 <code>a<\/code> \u8981\u6392\u5728 <code>c<\/code> \u524d\u9762\uff0c\u56e0\u4e3a\u5b57\u6bcd\u987a\u5e8f\u91cc <code>a &lt; c<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fb9\u754c\u6761\u4ef6<\/h3>\n\n\n\n<p>\u9898\u76ee\u5df2\u7ecf\u4fdd\u8bc1\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b57\u7b26\u4e32\u957f\u5ea6\u5927\u4e8e 3<\/li>\n\n\n\n<li>\u81f3\u5c11\u6709 3 \u79cd\u4e0d\u540c\u5b57\u7b26<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u6211\u4eec\u4e0d\u7528\u62c5\u5fc3\u201c\u6ca1\u6709 3 \u4e2a\u5b57\u7b26\u53ef\u9009\u201d\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u601d\u8def\u63d0\u793a<\/h2>\n\n\n\n<p>\u5148\u4e0d\u8981\u6025\u7740\u5199\u4ee3\u7801\uff0c\u5148\u60f3\u8fd9\u9898\u8981\u5206\u51e0\u6b65\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u7edf\u8ba1\u6bcf\u4e2a\u5b57\u7b26\u51fa\u73b0\u6b21\u6570<\/h3>\n\n\n\n<p>\u770b\u5230\u201c\u54ea\u4e2a\u5b57\u7b26\u51fa\u73b0\u6700\u591a\u201d\u8fd9\u79cd\u9898\uff0c\u7b2c\u4e00\u53cd\u5e94\u5c31\u5e94\u8be5\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u8981\u505a\u9891\u6b21\u7edf\u8ba1\u3002<\/strong><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u628a\u5b57\u7b26\u4e32\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26\u6570\u4e00\u904d\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>aabbbccde\n<\/code><\/pre>\n\n\n\n<p>\u7edf\u8ba1\u540e\u5e94\u8be5\u5f97\u5230\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>a: 2\nb: 3\nc: 2\nd: 1\ne: 1\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u628a\u7edf\u8ba1\u7ed3\u679c\u6392\u597d\u5e8f<\/h3>\n\n\n\n<p>\u9898\u76ee\u4e0d\u662f\u968f\u4fbf\u8f93\u51fa\uff0c\u800c\u662f\u6709\u987a\u5e8f\u8981\u6c42\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u7edf\u8ba1\u5b8c\u4e4b\u540e\uff0c\u8fd8\u8981\u6392\u5e8f\u3002<\/p>\n\n\n\n<p>\u6392\u5e8f\u89c4\u5219\u8981\u5199\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5148\u6309\u6b21\u6570\u964d\u5e8f<\/li>\n\n\n\n<li>\u5982\u679c\u6b21\u6570\u4e00\u6837\uff0c\u518d\u6309\u5b57\u7b26\u5347\u5e8f<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1a\u53d6\u524d\u4e09\u4e2a\u8f93\u51fa<\/h3>\n\n\n\n<p>\u6392\u5b8c\u5e8f\u540e\uff0c\u524d 3 \u4e2a\u5c31\u662f\u7b54\u6848\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b8c\u6574\u8bbe\u8ba1\u601d\u8def<\/h2>\n\n\n\n<p>\u8fd9\u9898\u53ef\u4ee5\u62c6\u6210 3 \u4e2a\u660e\u786e\u6b65\u9aa4\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c 1 \u6b65\uff1a\u7528\u5b57\u5178\u8bb0\u5f55\u6bcf\u4e2a\u5b57\u7b26\u51fa\u73b0\u6b21\u6570<\/h3>\n\n\n\n<p>\u6211\u4eec\u51c6\u5907\u4e00\u4e2a\u7a7a\u5b57\u5178 <code>count_dict<\/code>\u3002<\/p>\n\n\n\n<p>\u7136\u540e\u904d\u5386\u5b57\u7b26\u4e32\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u5b57\u7b26\u5df2\u7ecf\u5728\u5b57\u5178\u91cc\uff0c\u5c31\u6b21\u6570\u52a0 1<\/li>\n\n\n\n<li>\u5982\u679c\u4e0d\u5728\u5b57\u5178\u91cc\uff0c\u5c31\u5148\u8bb0\u4e3a 1<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u6837\u904d\u5386\u5b8c\u4ee5\u540e\uff0c\u5b57\u5178\u91cc\u5c31\u4fdd\u5b58\u4e86\u6240\u6709\u5b57\u7b26\u7684\u51fa\u73b0\u6b21\u6570\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{'a': 2, 'b': 3, 'c': 2, 'd': 1, 'e': 1}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c 2 \u6b65\uff1a\u628a\u5b57\u5178\u53d8\u6210\u53ef\u4ee5\u6392\u5e8f\u7684\u5f62\u5f0f<\/h3>\n\n\n\n<p>\u5b57\u5178\u672c\u8eab\u4e0d\u597d\u76f4\u63a5\u6309\u6211\u4eec\u8fd9\u4e2a\u590d\u6742\u89c4\u5219\u8f93\u51fa\uff0c\u6240\u4ee5\u901a\u5e38\u4f1a\u628a\u5b83\u53d8\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;('a', 2), ('b', 3), ('c', 2), ('d', 1), ('e', 1)]\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u5c31\u662f\u201c\u5b57\u7b26 + \u6b21\u6570\u201d\u7684\u5217\u8868\u3002<\/p>\n\n\n\n<p>\u7136\u540e\u5bf9\u8fd9\u4e2a\u5217\u8868\u6392\u5e8f\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c 3 \u6b65\uff1a\u8bbe\u8ba1\u6392\u5e8f\u89c4\u5219<\/h3>\n\n\n\n<p>\u8fd9\u9898\u6700\u5173\u952e\u7684\u5730\u65b9\u5c31\u5728\u8fd9\u91cc\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u60f3\u8981\u7684\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6b21\u6570\u5927\u7684\u5728\u524d\u9762\uff0c\u6240\u4ee5\u6b21\u6570\u8981\u201c\u964d\u5e8f\u201d<\/li>\n\n\n\n<li>\u5b57\u6bcd\u5c0f\u7684\u5728\u524d\u9762\uff0c\u6240\u4ee5\u5b57\u7b26\u8981\u201c\u5347\u5e8f\u201d<\/li>\n<\/ul>\n\n\n\n<p>Python \u91cc\u5e38\u5199\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sorted_items = sorted(items, key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u7684\u610f\u601d\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>x[1]<\/code> \u662f\u6b21\u6570<\/li>\n\n\n\n<li><code>-x[1]<\/code> \u8868\u793a\u8ba9\u6b21\u6570\u5927\u7684\u6392\u524d\u9762<\/li>\n\n\n\n<li><code>x[0]<\/code> \u662f\u5b57\u7b26\uff0c\u9ed8\u8ba4\u5347\u5e8f\u6392\u5217<\/li>\n<\/ul>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u4f1a\u5148\u6bd4\u8f83 <code>-\u6b21\u6570<\/code>\uff0c\u5982\u679c\u4e00\u6837\uff0c\u518d\u6bd4\u8f83\u5b57\u7b26\u3002<\/p>\n\n\n\n<p>\u8fd9\u6b63\u597d\u5c31\u662f\u9898\u76ee\u8981\u6c42\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4ee3\u7801\u5b9e\u73b0<\/h2>\n\n\n\n<p>\u4e0b\u9762\u5148\u7ed9\u4f60\u4e00\u4e2a\u9002\u5408\u521d\u5b66\u8005\u7406\u89e3\u7684\u57fa\u7840\u5199\u6cd5\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>s = input().strip()\n\ncount_dict = {}\n\n# \u7edf\u8ba1\u6bcf\u4e2a\u5b57\u7b26\u51fa\u73b0\u6b21\u6570\nfor ch in s:\n    if ch in count_dict:\n        count_dict&#91;ch] += 1\n    else:\n        count_dict&#91;ch] = 1\n\n# \u8f6c\u6210\u5217\u8868\uff0c\u65b9\u4fbf\u6392\u5e8f\nitems = list(count_dict.items())\n\n# \u6309\u201c\u6b21\u6570\u964d\u5e8f\uff0c\u5b57\u7b26\u5347\u5e8f\u201d\u6392\u5e8f\nitems.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n\n# \u8f93\u51fa\u524d\u4e09\u4e2a\nfor i in range(3):\n    print(items&#91;i]&#91;0], items&#91;i]&#91;1])\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8fd0\u884c\u6f14\u793a<\/h2>\n\n\n\n<p>\u6211\u4eec\u7528\u6837\u4f8b\u6765\u624b\u52a8\u8d70\u4e00\u904d\u3002<\/p>\n\n\n\n<p>\u8f93\u5165\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>aabbbccde\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u7edf\u8ba1\u6b21\u6570<\/h3>\n\n\n\n<p>\u904d\u5386\u5b57\u7b26\u4e32\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8bfb\u5230 <code>a<\/code>\uff0c\u8bb0\u6210 <code>a:1<\/code><\/li>\n\n\n\n<li>\u518d\u8bfb\u5230 <code>a<\/code>\uff0c\u53d8\u6210 <code>a:2<\/code><\/li>\n\n\n\n<li>\u8bfb\u5230 <code>b<\/code>\uff0c\u8bb0\u6210 <code>b:1<\/code><\/li>\n\n\n\n<li>\u518d\u8bfb\u5230 <code>b<\/code>\uff0c\u53d8\u6210 <code>b:2<\/code><\/li>\n\n\n\n<li>\u518d\u8bfb\u5230 <code>b<\/code>\uff0c\u53d8\u6210 <code>b:3<\/code><\/li>\n\n\n\n<li>\u8bfb\u5230 <code>c<\/code>\uff0c\u8bb0\u6210 <code>c:1<\/code><\/li>\n\n\n\n<li>\u518d\u8bfb\u5230 <code>c<\/code>\uff0c\u53d8\u6210 <code>c:2<\/code><\/li>\n\n\n\n<li>\u8bfb\u5230 <code>d<\/code>\uff0c\u8bb0\u6210 <code>d:1<\/code><\/li>\n\n\n\n<li>\u8bfb\u5230 <code>e<\/code>\uff0c\u8bb0\u6210 <code>e:1<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6700\u540e\u5b57\u5178\u53d8\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{'a': 2, 'b': 3, 'c': 2, 'd': 1, 'e': 1}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u8f6c\u6210\u5217\u8868<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;('a', 2), ('b', 3), ('c', 2), ('d', 1), ('e', 1)]\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1a\u6392\u5e8f<\/h3>\n\n\n\n<p>\u6309\u89c4\u5219\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>b<\/code> \u51fa\u73b0 3 \u6b21\uff0c\u6700\u591a\uff0c\u6392\u7b2c\u4e00<\/li>\n\n\n\n<li><code>a<\/code> \u548c <code>c<\/code> \u90fd\u51fa\u73b0 2 \u6b21\uff0c\u4f46 <code>a<\/code> \u5b57\u6bcd\u66f4\u5c0f\uff0c\u6240\u4ee5 <code>a<\/code> \u5728\u524d<\/li>\n\n\n\n<li><code>c<\/code> \u6392\u7b2c\u4e09<\/li>\n\n\n\n<li><code>d<\/code> \u548c <code>e<\/code> \u90fd\u662f 1 \u6b21\uff0c\u4f46\u5df2\u7ecf\u4e0d\u5728\u524d\u4e09\u91cc\u4e86<\/li>\n<\/ol>\n\n\n\n<p>\u6392\u5e8f\u540e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;('b', 3), ('a', 2), ('c', 2), ('d', 1), ('e', 1)]\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u56db\u6b65\uff1a\u8f93\u51fa\u524d\u4e09\u4e2a<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>b 3\na 2\nc 2\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8fd9\u9898\u6700\u6838\u5fc3\u7684\u601d\u8003\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u4ee5\u540e\u4f60\u518d\u9047\u5230\u8fd9\u79cd\u9898\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fd9\u6837\u60f3\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u95ee\uff1a\u9898\u76ee\u662f\u4e0d\u662f\u5728\u95ee\u201c\u8c01\u51fa\u73b0\u5f97\u6700\u591a\u201d<\/h3>\n\n\n\n<p>\u5982\u679c\u662f\uff0c\u90a3\u5927\u6982\u7387\u8981\u505a<strong>\u9891\u6b21\u7edf\u8ba1<\/strong>\u3002<\/p>\n\n\n\n<p>\u5e38\u89c1\u5173\u952e\u8bcd\u6709\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>most common<\/li>\n\n\n\n<li>frequency<\/li>\n\n\n\n<li>count<\/li>\n\n\n\n<li>\u91cd\u590d\u6b21\u6570<\/li>\n\n\n\n<li>\u51fa\u73b0\u6700\u591a<\/li>\n<\/ul>\n\n\n\n<p>\u53ea\u8981\u770b\u5230\u8fd9\u4e9b\u8bcd\uff0c\u5c31\u8981\u60f3\u5230\uff1a<\/p>\n\n\n\n<p><strong>\u5148\u7edf\u8ba1\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u95ee\uff1a\u7edf\u8ba1\u5b8c\u540e\u662f\u4e0d\u662f\u8fd8\u8981\u6c42\u987a\u5e8f<\/h3>\n\n\n\n<p>\u5982\u679c\u9898\u76ee\u8bf4\u4e86\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6309\u5927\u5c0f\u6392\u5e8f<\/li>\n\n\n\n<li>\u76f8\u540c\u7684\u65f6\u5019\u518d\u6309\u522b\u7684\u89c4\u5219\u6392<\/li>\n<\/ul>\n\n\n\n<p>\u90a3\u4f60\u5c31\u8981\u60f3\u5230\uff1a<\/p>\n\n\n\n<p><strong>\u7edf\u8ba1\u4e4b\u540e\u8fd8\u8981\u6392\u5e8f\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u95ee\uff1a\u6700\u540e\u662f\u4e0d\u662f\u53ea\u53d6\u524d\u51e0\u4e2a<\/h3>\n\n\n\n<p>\u5982\u679c\u9898\u76ee\u8bf4 top 3\u3001\u524d 5\u3001\u6700\u591a\u7684 1 \u4e2a\uff0c\u90a3\u5c31\u8bf4\u660e\uff1a<\/p>\n\n\n\n<p><strong>\u6392\u5b8c\u5e8f\u540e\u53ea\u53d6\u524d\u51e0\u9879\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u65b9\u6cd5\u603b\u7ed3<\/h2>\n\n\n\n<p>\u8fd9\u9053\u9898\u7684\u6807\u51c6\u5957\u8def\u53ef\u4ee5\u603b\u7ed3\u6210\u4e00\u53e5\u6a21\u677f\uff1a<\/p>\n\n\n\n<p><strong>\u904d\u5386\u7edf\u8ba1 -&gt; \u6309\u89c4\u5219\u6392\u5e8f -&gt; \u53d6\u524d\u51e0\u4e2a\u8f93\u51fa<\/strong><\/p>\n\n\n\n<p>\u4ee5\u540e\u9047\u5230\u540c\u7c7b\u9898\uff0c\u4f60\u5c31\u6309\u8fd9\u4e2a\u987a\u5e8f\u62c6\u3002<\/p>\n\n\n\n<p>\u53ef\u4ee5\u628a\u8fd9\u9898\u8bb0\u6210\u4e0b\u9762\u8fd9\u4e2a\u505a\u9898\u6a21\u677f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8f93\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32<\/li>\n\n\n\n<li>\u7528\u5b57\u5178\u7edf\u8ba1\u6bcf\u4e2a\u5b57\u7b26\u6b21\u6570<\/li>\n\n\n\n<li>\u628a\u5b57\u5178\u8f6c\u6210 <code>(\u5b57\u7b26, \u6b21\u6570)<\/code> \u7684\u5217\u8868<\/li>\n\n\n\n<li>\u7528\u6392\u5e8f\u89c4\u5219\u5904\u7406<\/li>\n\n\n\n<li>\u8f93\u51fa\u524d 3 \u4e2a<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8865\u5145\u8bf4\u660e\uff1a\u4e3a\u4ec0\u4e48\u8fd9\u91cc\u7528\u5b57\u5178\u6700\u5408\u9002<\/h2>\n\n\n\n<p>\u56e0\u4e3a\u6211\u4eec\u8981\u505a\u7684\u662f\uff1a<\/p>\n\n\n\n<p>\u201c\u4e00\u4e2a\u5b57\u7b26\u201d \u5bf9\u5e94 \u201c\u5b83\u51fa\u73b0\u7684\u6b21\u6570\u201d<\/p>\n\n\n\n<p>\u8fd9\u6b63\u662f\u5b57\u5178\u6700\u64c5\u957f\u7684\u4e8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u952e   -&gt; \u503c\n\u5b57\u7b26 -&gt; \u6b21\u6570\n<\/code><\/pre>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{'a': 2, 'b': 3, 'c': 2}\n<\/code><\/pre>\n\n\n\n<p>\u5982\u679c\u4e0d\u7528\u5b57\u5178\uff0c\u4f60\u5c31\u5f97\u53cd\u590d\u6570\u5f88\u591a\u6b21\uff0c\u4f1a\u66f4\u9ebb\u70e6\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u770b\u5230\u201c\u7edf\u8ba1\u6bcf\u4e2a\u5143\u7d20\u51fa\u73b0\u6b21\u6570\u201d\uff0c\u4f18\u5148\u60f3\u5230\u5b57\u5178\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7ec3\u4e60<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60\u9898<\/h3>\n\n\n\n<p>\u8f93\u5165\u4e00\u4e2a\u5c0f\u5199\u5b57\u7b26\u4e32\uff0c\u8f93\u51fa\u5176\u4e2d\u51fa\u73b0\u6b21\u6570\u6700\u591a\u7684 <strong>2<\/strong> \u4e2a\u5b57\u7b26\u3002<\/p>\n\n\n\n<p>\u8981\u6c42\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u6309\u51fa\u73b0\u6b21\u6570\u964d\u5e8f<\/li>\n\n\n\n<li>\u5982\u679c\u6b21\u6570\u76f8\u540c\uff0c\u6309\u5b57\u6bcd\u5347\u5e8f<\/li>\n\n\n\n<li>\u6bcf\u4e2a\u7ed3\u679c\u5355\u72ec\u5360\u4e00\u884c\u8f93\u51fa<\/li>\n<\/ol>\n\n\n\n<p>\u4f8b\u5982\u8f93\u5165\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>banana\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u5148\u81ea\u5df1\u8bd5\u7740\u60f3\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u63d0\u793a<\/h3>\n\n\n\n<p>\u5148\u601d\u8003\u8fd9\u4e09\u6b65\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u600e\u4e48\u7edf\u8ba1\u6bcf\u4e2a\u5b57\u7b26\u51fa\u73b0\u6b21\u6570<\/li>\n\n\n\n<li>\u600e\u4e48\u628a\u7edf\u8ba1\u7ed3\u679c\u6392\u5e8f<\/li>\n\n\n\n<li>\u600e\u4e48\u53ea\u8f93\u51fa\u524d 2 \u4e2a<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u8981\u5355\u72ec\u8bb2\u8fd9\u53e5\u4ee3\u7801<\/h2>\n\n\n\n<p>\u8fd9\u53e5\u4ee3\u7801\u786e\u5b9e\u662f\u8fd9\u9053\u9898\u91cc\u6700\u5173\u952e\u7684\u4e00\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u5f88\u591a\u521d\u5b66\u8005\u770b\u5230\u5b83\u4f1a\u89c9\u5f97\u201c\u6bcf\u4e2a\u7b26\u53f7\u90fd\u8ba4\u8bc6\uff0c\u4f46\u653e\u5728\u4e00\u8d77\u5c31\u770b\u4e0d\u61c2\u201d\u3002\u8fd9\u5f88\u6b63\u5e38\uff0c\u56e0\u4e3a\u5b83\u5176\u5b9e\u628a\u4e09\u4e2a\u77e5\u8bc6\u70b9\u538b\u5728\u4e86\u4e00\u884c\u91cc\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>sort()<\/code> \u662f\u6392\u5e8f<\/li>\n\n\n\n<li><code>key=<\/code> \u662f\u544a\u8bc9 Python \u201c\u6309\u4ec0\u4e48\u89c4\u5219\u6392\u201d<\/li>\n\n\n\n<li><code>lambda x: (-x[1], x[0])<\/code> \u662f\u4e34\u65f6\u5199\u51fa\u6765\u7684\u6392\u5e8f\u89c4\u5219<\/li>\n<\/ol>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u8282\u6211\u4eec\u4e0d\u6025\u7740\u8bb0\u8fd9\u53e5\uff0c\u800c\u662f\u628a\u5b83\u4e00\u5c42\u4e00\u5c42\u62c6\u5f00\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5148\u770b <code>items<\/code> \u5230\u5e95\u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p>\u5728\u8fd9\u9053\u9898\u91cc\uff0c\u524d\u9762\u6211\u4eec\u901a\u5e38\u4f1a\u5148\u7edf\u8ba1\u5b57\u7b26\u51fa\u73b0\u6b21\u6570\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>count_dict = {'a': 2, 'b': 3, 'c': 2, 'd': 1, 'e': 1}\n<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items = list(count_dict.items())\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6 <code>items<\/code> \u53d8\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;('a', 2), ('b', 3), ('c', 2), ('d', 1), ('e', 1)]\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c<code>items<\/code> \u662f\u4e00\u4e2a\u5217\u8868\uff0c\u91cc\u9762\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u4e2a\u4e8c\u5143\u7ec4\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(\u5b57\u7b26, \u6b21\u6570)\n<\/code><\/pre>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>('a', 2)<\/code> \u8868\u793a\u5b57\u7b26 <code>a<\/code> \u51fa\u73b0 2 \u6b21<\/li>\n\n\n\n<li><code>('b', 3)<\/code> \u8868\u793a\u5b57\u7b26 <code>b<\/code> \u51fa\u73b0 3 \u6b21<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e2a\u524d\u63d0\u4e00\u5b9a\u8981\u5148\u770b\u6e05\u695a\uff0c\u56e0\u4e3a\u540e\u9762\u7684 <code>x[0]<\/code>\u3001<code>x[1]<\/code> \u90fd\u662f\u57fa\u4e8e\u8fd9\u4e2a\u7ed3\u6784\u6765\u7684\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><code>items.sort()<\/code> \u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p>\u5148\u53ea\u770b\u6700\u5916\u5c42\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort()\n<\/code><\/pre>\n\n\n\n<p>\u5b83\u7684\u610f\u601d\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u628a\u5217\u8868 <code>items<\/code> \u539f\u5730\u6392\u5e8f\u3002<\/strong><\/p>\n\n\n\n<p>\u201c\u539f\u5730\u6392\u5e8f\u201d\u5c31\u662f\u76f4\u63a5\u6539\u8fd9\u4e2a\u5217\u8868\u672c\u8eab\uff0c\u4e0d\u4f1a\u65b0\u5efa\u4e00\u4e2a\u65b0\u5217\u8868\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>nums = &#91;3, 1, 2]\nnums.sort()\nprint(nums)\n<\/code><\/pre>\n\n\n\n<p>\u7ed3\u679c\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;1, 2, 3]\n<\/code><\/pre>\n\n\n\n<p>\u539f\u6765\u7684 <code>nums<\/code> \u81ea\u5df1\u53d8\u4e86\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u9053\u9898\u91cc\u7684\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(...)\n<\/code><\/pre>\n\n\n\n<p>\u5c31\u662f\u5728\u8bf4\uff1a<\/p>\n\n\n\n<p><strong>\u628a <code>items<\/code> \u8fd9\u4e2a\u5217\u8868\u6309\u67d0\u79cd\u89c4\u5219\u91cd\u65b0\u6392\u5217\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><code>key=<\/code> \u5230\u5e95\u662f\u4ec0\u4e48\u610f\u601d<\/h2>\n\n\n\n<p>\u8fd9\u4e00\u90e8\u5206\u662f\u6700\u5bb9\u6613\u5361\u4f4f\u7684\u5730\u65b9\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=...)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u7684 <code>key<\/code> \u53ef\u4ee5\u7406\u89e3\u6210\uff1a<\/p>\n\n\n\n<p><strong>\u201c\u6392\u5e8f\u65f6\uff0c\u4f60\u62ff\u6bcf\u4e2a\u5143\u7d20\u7684\u4ec0\u4e48\u4e1c\u897f\u6765\u6bd4\u8f83\uff1f\u201d<\/strong><\/p>\n\n\n\n<p>\u6bd4\u5982\u6709\u8fd9\u6837\u4e00\u4e2a\u5217\u8868\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>words = &#91;'apple', 'kiwi', 'banana']\n<\/code><\/pre>\n\n\n\n<p>\u5982\u679c\u76f4\u63a5\u6392\u5e8f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>words.sort()\n<\/code><\/pre>\n\n\n\n<p>\u4f1a\u6309\u5b57\u6bcd\u987a\u5e8f\u6392\u3002<\/p>\n\n\n\n<p>\u4f46\u5982\u679c\u4f60\u60f3\u6309\u201c\u5355\u8bcd\u957f\u5ea6\u201d\u6392\uff0c\u5c31\u53ef\u4ee5\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>words.sort(key=len)\n<\/code><\/pre>\n\n\n\n<p>\u56e0\u4e3a <code>key=len<\/code> \u7684\u610f\u601d\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5bf9 <code>'apple'<\/code>\uff0c\u62ff <code>len('apple') = 5<\/code><\/li>\n\n\n\n<li>\u5bf9 <code>'kiwi'<\/code>\uff0c\u62ff <code>len('kiwi') = 4<\/code><\/li>\n\n\n\n<li>\u5bf9 <code>'banana'<\/code>\uff0c\u62ff <code>len('banana') = 6<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u4e5f\u5c31\u662f\u5b9e\u9645\u6bd4\u8f83\u7684\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>5, 4, 6\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\u6700\u540e\u987a\u5e8f\u5c31\u53d8\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;'kiwi', 'apple', 'banana']\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\uff0c<code>key<\/code> \u4e0d\u662f\u201c\u76f4\u63a5\u6392\u5e8f\u7684\u7ed3\u679c\u201d\uff0c\u800c\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u5148\u4ece\u6bcf\u4e2a\u5143\u7d20\u8eab\u4e0a\u63d0\u53d6\u4e00\u4e2a\u201c\u6bd4\u8f83\u4f9d\u636e\u201d\uff0c\u518d\u6309\u8fd9\u4e2a\u4f9d\u636e\u6392\u5e8f\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><code>lambda x:<\/code> \u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p>\u73b0\u5728\u770b\u8fd9\u4e00\u6bb5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda x: (-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u5148\u628a\u5b83\u7406\u89e3\u6210\uff1a<\/p>\n\n\n\n<p><strong>\u5199\u4e86\u4e00\u4e2a\u5f88\u77ed\u7684\u5c0f\u51fd\u6570\u3002<\/strong><\/p>\n\n\n\n<p>\u5b83\u7b49\u4ef7\u4e8e\u8fd9\u6837\u4e00\u4e2a\u666e\u901a\u51fd\u6570\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def rule(x):\n    return (-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u5176\u5b9e\u5c31\u7b49\u4ef7\u4e8e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def rule(x):\n    return (-x&#91;1], x&#91;0])\n\nitems.sort(key=rule)\n<\/code><\/pre>\n\n\n\n<p>\u53ea\u662f <code>lambda<\/code> \u5199\u6cd5\u66f4\u77ed\uff0c\u6240\u4ee5\u5e38\u7528\u4e8e\u8fd9\u79cd\u201c\u4e34\u65f6\u53ea\u7528\u4e00\u6b21\u7684\u5c0f\u89c4\u5219\u201d\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8fd9\u91cc\u7684 <code>x<\/code> \u5230\u5e95\u662f\u8c01<\/h2>\n\n\n\n<p>\u56e0\u4e3a <code>items<\/code> \u662f\u8fd9\u6837\u7684\u5217\u8868\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;('a', 2), ('b', 3), ('c', 2), ('d', 1), ('e', 1)]\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\u6392\u5e8f\u65f6\uff0cPython \u4f1a\u628a\u5217\u8868\u91cc\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\uff0c\u4f9d\u6b21\u62ff\u51fa\u6765\u4ea4\u7ed9 <code>lambda x: ...<\/code>\u3002<\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u8fd9\u91cc\u7684 <code>x<\/code> \u6709\u53ef\u80fd\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>('a', 2)\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u6709\u53ef\u80fd\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>('b', 3)\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u53ef\u80fd\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>('c', 2)\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u91cc\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>x[0]<\/code> \u5c31\u662f\u5143\u7ec4\u91cc\u7684\u7b2c 0 \u4e2a\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u5b57\u7b26<\/li>\n\n\n\n<li><code>x[1]<\/code> \u5c31\u662f\u5143\u7ec4\u91cc\u7684\u7b2c 1 \u4e2a\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u6b21\u6570<\/li>\n<\/ul>\n\n\n\n<p>\u6bd4\u5982\u5f53\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x = ('b', 3)\n<\/code><\/pre>\n\n\n\n<p>\u90a3\u4e48\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x&#91;0] == 'b'\nx&#91;1] == 3\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><code>(-x[1], x[0])<\/code> \u5230\u5e95\u5728\u8fd4\u56de\u4ec0\u4e48<\/h2>\n\n\n\n<p>\u8fd9\u662f\u6574\u53e5\u6700\u6838\u5fc3\u7684\u5730\u65b9\u3002<\/p>\n\n\n\n<p>\u5b83\u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u4e8c\u5143\u7ec4\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(-\u6b21\u6570, \u5b57\u7b26)\n<\/code><\/pre>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5f53 <code>x = ('a', 2)<\/code><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>(-x&#91;1], x&#91;0]) = (-2, 'a')\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u5f53 <code>x = ('b', 3)<\/code><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>(-x&#91;1], x&#91;0]) = (-3, 'b')\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u5f53 <code>x = ('c', 2)<\/code><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>(-x&#91;1], x&#91;0]) = (-2, 'c')\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\u6392\u5e8f\u65f6\uff0cPython \u5b9e\u9645\u6bd4\u8f83\u7684\u4e0d\u662f\u539f\u6765\u7684\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>('a', 2), ('b', 3), ('c', 2)\n<\/code><\/pre>\n\n\n\n<p>\u800c\u662f\u6bd4\u8f83\u5b83\u4eec\u5bf9\u5e94\u7684\u201c\u6392\u5e8f\u94a5\u5319\u201d\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(-2, 'a'), (-3, 'b'), (-2, 'c')\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u8981\u5199 <code>-x[1]<\/code><\/h2>\n\n\n\n<p>\u56e0\u4e3a\u9ed8\u8ba4\u6392\u5e8f\u662f<strong>\u5347\u5e8f<\/strong>\u3002<\/p>\n\n\n\n<p>\u5347\u5e8f\u7684\u610f\u601d\u662f\uff1a\u5c0f\u7684\u5728\u524d\uff0c\u5927\u7684\u5728\u540e\u3002<\/p>\n\n\n\n<p>\u4f46\u662f\u9898\u76ee\u8981\u6c42\u6b21\u6570<strong>\u964d\u5e8f<\/strong>\uff0c\u4e5f\u5c31\u662f\u5927\u7684\u5728\u524d\uff0c\u5c0f\u7684\u5728\u540e\u3002<\/p>\n\n\n\n<p>\u600e\u4e48\u529e\uff1f<\/p>\n\n\n\n<p>\u4e00\u4e2a\u5f88\u5e38\u89c1\u7684\u6280\u5de7\u5c31\u662f\uff1a\u628a\u6570\u5b57\u53d6\u8d1f\u53f7\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\u672c\u6765\u6b21\u6570\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>3, 2, 2, 1, 1\n<\/code><\/pre>\n\n\n\n<p>\u53d6\u8d1f\u540e\u53d8\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-3, -2, -2, -1, -1\n<\/code><\/pre>\n\n\n\n<p>\u5347\u5e8f\u6392\u5217\u8fd9\u4e9b\u8d1f\u6570\u65f6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-3 &lt; -2 &lt; -1\n<\/code><\/pre>\n\n\n\n<p>\u5c31\u4f1a\u5f97\u5230\u5bf9\u5e94\u539f\u6570\u7684\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>3 &gt; 2 &gt; 1\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff1a<\/p>\n\n\n\n<p><strong>\u7528\u8d1f\u53f7\uff0c\u628a\u201c\u60f3\u8981\u7684\u964d\u5e8f\u201d\u53d8\u6210\u4e86\u201c\u9ed8\u8ba4\u7684\u5347\u5e8f\u201d\u3002<\/strong><\/p>\n\n\n\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u5199 <code>-x[1]<\/code>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u540e\u9762\u53c8\u8981\u5199 <code>x[0]<\/code><\/h2>\n\n\n\n<p>\u9898\u76ee\u8981\u6c42\u662f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u6309\u6b21\u6570\u964d\u5e8f<\/li>\n\n\n\n<li>\u5982\u679c\u6b21\u6570\u76f8\u540c\uff0c\u518d\u6309\u5b57\u6bcd\u5347\u5e8f<\/li>\n<\/ol>\n\n\n\n<p>\u90a3\u524d\u9762\u7684 <code>-x[1]<\/code> \u53ea\u89e3\u51b3\u4e86\u7b2c\u4e00\u5c42\uff1a\u6b21\u6570\u964d\u5e8f\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u4e24\u4e2a\u5b57\u7b26\u6b21\u6570\u4e00\u6837\u600e\u4e48\u529e\uff1f<\/p>\n\n\n\n<p>\u8fd9\u65f6\u5c31\u8981\u770b\u7b2c\u4e8c\u5c42\uff0c\u6240\u4ee5\u52a0\u4e0a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x&#91;0]\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u5c31\u662f\u5b57\u7b26\u672c\u8eab\u3002<\/p>\n\n\n\n<p>\u5b57\u7b26\u9ed8\u8ba4\u6bd4\u8f83\u5c31\u662f\u6309\u5b57\u6bcd\u987a\u5e8f\u5347\u5e8f\u6392\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>'a' &lt; 'b' &lt; 'c'\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u521a\u597d\u8868\u793a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c\u4e00\u5173\u952e\u5b57\uff1a\u6b21\u6570\u964d\u5e8f<\/li>\n\n\n\n<li>\u7b2c\u4e8c\u5173\u952e\u5b57\uff1a\u5b57\u7b26\u5347\u5e8f<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Python \u4e3a\u4ec0\u4e48\u80fd\u6309\u5143\u7ec4\u6392\u5e8f<\/h2>\n\n\n\n<p>\u8fd9\u662f\u8fd9\u53e5\u4ee3\u7801\u80fd\u6210\u7acb\u7684\u6839\u672c\u539f\u56e0\u4e4b\u4e00\u3002<\/p>\n\n\n\n<p>Python \u6bd4\u8f83\u4e24\u4e2a\u5143\u7ec4\u65f6\uff0c\u662f<strong>\u4ece\u524d\u5f80\u540e\u9010\u4e2a\u6bd4\u8f83<\/strong>\u7684\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\u6bd4\u8f83\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(-3, 'b') \u548c (-2, 'a')\n<\/code><\/pre>\n\n\n\n<p>\u5148\u6bd4\u7b2c\u4e00\u4e2a\u4f4d\u7f6e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>-3 &lt; -2<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u7b2c\u4e00\u4e2a\u4f4d\u7f6e\u5df2\u7ecf\u5206\u51fa\u5927\u5c0f\u4e86\uff0c\u6240\u4ee5\u4e0d\u7528\u770b\u7b2c\u4e8c\u4e2a\u4f4d\u7f6e\u4e86\u3002<br>\u4e8e\u662f <code>(-3, 'b')<\/code> \u4f1a\u6392\u5728\u524d\u9762\u3002<\/p>\n\n\n\n<p>\u518d\u770b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(-2, 'a') \u548c (-2, 'c')\n<\/code><\/pre>\n\n\n\n<p>\u5148\u6bd4\u7b2c\u4e00\u4e2a\u4f4d\u7f6e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>-2 == -2<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u7b2c\u4e00\u4e2a\u4f4d\u7f6e\u4e00\u6837\uff0c\u90a3\u5c31\u7ee7\u7eed\u6bd4\u7b2c\u4e8c\u4e2a\u4f4d\u7f6e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>'a' &lt; 'c'<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5 <code>(-2, 'a')<\/code> \u6392\u5728\u524d\u9762\u3002<\/p>\n\n\n\n<p>\u8fd9\u5c31\u5b8c\u5168\u7b26\u5408\u6211\u4eec\u7684\u9700\u6c42\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6b21\u6570\u4e0d\u540c\uff0c\u5148\u770b\u6b21\u6570<\/li>\n\n\n\n<li>\u6b21\u6570\u76f8\u540c\uff0c\u518d\u770b\u5b57\u6bcd<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7528\u6837\u4f8b\u624b\u52a8\u6a21\u62df\u4e00\u904d<\/h2>\n\n\n\n<p>\u5047\u8bbe\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items = &#91;('a', 2), ('b', 3), ('c', 2), ('d', 1), ('e', 1)]\n<\/code><\/pre>\n\n\n\n<p>\u6267\u884c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u6bcf\u4e2a\u5143\u7d20\u5148\u7b97\u51fa\u81ea\u5df1\u7684 key<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>('a', 2)<\/code> -> <code>(-2, 'a')<\/code><\/li>\n\n\n\n<li><code>('b', 3)<\/code> -> <code>(-3, 'b')<\/code><\/li>\n\n\n\n<li><code>('c', 2)<\/code> -> <code>(-2, 'c')<\/code><\/li>\n\n\n\n<li><code>('d', 1)<\/code> -> <code>(-1, 'd')<\/code><\/li>\n\n\n\n<li><code>('e', 1)<\/code> -> <code>(-1, 'e')<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a\u6309 key \u6392\u5e8f<\/h3>\n\n\n\n<p>\u4e5f\u5c31\u662f\u6392\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(-3, 'b')\n(-2, 'a')\n(-2, 'c')\n(-1, 'd')\n(-1, 'e')\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1a\u5f97\u5230\u539f\u5143\u7d20\u7684\u65b0\u987a\u5e8f<\/h3>\n\n\n\n<p>\u4e8e\u662f\u539f\u5217\u8868\u53d8\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;('b', 3), ('a', 2), ('c', 2), ('d', 1), ('e', 1)]\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u5c31\u662f\u6700\u7ec8\u7ed3\u679c\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u7b80\u5355\u5199\u6210 <code>reverse=True<\/code><\/h2>\n\n\n\n<p>\u5f88\u591a\u521d\u5b66\u8005\u4f1a\u60f3\uff1a<\/p>\n\n\n\n<p>\u201c\u65e2\u7136\u6b21\u6570\u8981\u4ece\u5927\u5230\u5c0f\uff0c\u90a3\u6211\u76f4\u63a5\u53cd\u8fc7\u6765\u6392\u4e0d\u5c31\u884c\u4e86\uff1f\u201d<\/p>\n\n\n\n<p>\u6bd4\u5982\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (x&#91;1], x&#91;0]), reverse=True)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u6837\u901a\u5e38\u4f1a\u51fa\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u56e0\u4e3a <code>reverse=True<\/code> \u4f1a\u628a\u6574\u4e2a\u6bd4\u8f83\u7ed3\u679c\u4e00\u8d77\u53cd\u8fc7\u6765\u3002<\/p>\n\n\n\n<p>\u8fd9\u610f\u5473\u7740\u4e0d\u4ec5\u6b21\u6570\u4f1a\u53d8\u6210\u964d\u5e8f\uff0c\u8fde\u5b57\u7b26\u4e5f\u4f1a\u53d8\u6210\u964d\u5e8f\u3002<\/p>\n\n\n\n<p>\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>('a', 2)\n('c', 2)\n<\/code><\/pre>\n\n\n\n<p>\u672c\u6765\u9898\u76ee\u8981\u6c42\u6b21\u6570\u76f8\u540c\u65f6\u6309\u5b57\u6bcd\u5347\u5e8f\uff0c\u6240\u4ee5\u5e94\u8be5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>a \u5728\u524d\uff0cc \u5728\u540e\n<\/code><\/pre>\n\n\n\n<p>\u4f46\u5982\u679c\u4f60\u6574\u4f53 <code>reverse=True<\/code>\uff0c\u5c31\u53ef\u80fd\u53d8\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>c \u5728\u524d\uff0ca \u5728\u540e\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u5c31\u4e0d\u7b26\u5408\u9898\u610f\u4e86\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u9898\u4e0d\u80fd\u5077\u61d2\u5199\u6210\u201c\u6574\u4f53\u53cd\u8f6c\u201d\uff0c\u800c\u8981\u7cbe\u786e\u5730\u5199\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6b21\u6570\u624b\u52a8\u505a\u964d\u5e8f<\/li>\n\n\n\n<li>\u5b57\u7b26\u4fdd\u7559\u5347\u5e8f<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u662f\u66f4\u51c6\u786e\u7684\u505a\u6cd5\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u518d\u628a\u6574\u53e5\u7ffb\u8bd1\u6210\u4eba\u8bdd<\/h2>\n\n\n\n<p>\u73b0\u5728\u4f60\u53ef\u4ee5\u628a\u8fd9\u53e5\u4ee3\u7801\u5b8c\u6574\u7ffb\u8bd1\u6210\u4e00\u53e5\u4e2d\u6587\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u610f\u601d\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u628a <code>items<\/code> \u91cc\u7684\u6bcf\u4e2a\u5143\u7d20 <code>x<\/code> \u90fd\u8f6c\u6362\u6210 <code>(-\u51fa\u73b0\u6b21\u6570, \u5b57\u7b26)<\/code> \u8fd9\u4e2a\u6bd4\u8f83\u4f9d\u636e\uff0c\u7136\u540e\u6309\u8fd9\u4e2a\u4f9d\u636e\u5347\u5e8f\u6392\u5e8f\u3002<\/strong><\/p>\n\n\n\n<p>\u56e0\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>-\u51fa\u73b0\u6b21\u6570<\/code> \u4f1a\u8ba9\u539f\u6765\u7684\u5927\u6b21\u6570\u6392\u524d\u9762<\/li>\n\n\n\n<li><code>\u5b57\u7b26<\/code> \u4f1a\u8ba9\u76f8\u540c\u6b21\u6570\u65f6\u6309\u5b57\u6bcd\u987a\u5e8f\u6392<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u6700\u7ec8\u6548\u679c\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u6309\u6b21\u6570\u964d\u5e8f\uff0c\u6b21\u6570\u76f8\u540c\u6309\u5b57\u6bcd\u5347\u5e8f\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f60\u4ee5\u540e\u9047\u5230\u7c7b\u4f3c\u5199\u6cd5\uff0c\u5e94\u8be5\u600e\u4e48\u62c6<\/h2>\n\n\n\n<p>\u4ee5\u540e\u770b\u5230\u8fd9\u79cd\u4ee3\u7801\uff0c\u4e0d\u8981\u6574\u53e5\u786c\u80cc\uff0c\u800c\u662f\u6309\u8fd9\u4e2a\u987a\u5e8f\u62c6\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c 1 \u6b65\uff1a\u5148\u770b\u5217\u8868\u91cc\u7684\u6bcf\u4e2a\u5143\u7d20\u957f\u4ec0\u4e48\u6837<\/h3>\n\n\n\n<p>\u6bd4\u5982\u8fd9\u9898\u91cc\u6bcf\u4e2a\u5143\u7d20\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(\u5b57\u7b26, \u6b21\u6570)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c 2 \u6b65\uff1a\u518d\u770b <code>x[0]<\/code>\u3001<code>x[1]<\/code> \u5206\u522b\u4ee3\u8868\u8c01<\/h3>\n\n\n\n<p>\u8fd9\u91cc\u5c31\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>x[0]<\/code> \u662f\u5b57\u7b26<\/li>\n\n\n\n<li><code>x[1]<\/code> \u662f\u6b21\u6570<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c 3 \u6b65\uff1a\u6700\u540e\u770b <code>key<\/code> \u8fd4\u56de\u4e86\u4ec0\u4e48\u7ed3\u6784<\/h3>\n\n\n\n<p>\u8fd9\u91cc\u8fd4\u56de\u7684\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(-\u6b21\u6570, \u5b57\u7b26)\n<\/code><\/pre>\n\n\n\n<p>\u90a3\u5c31\u8bf4\u660e\u6392\u5e8f\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5148\u6309\u6b21\u6570\u964d\u5e8f<\/li>\n\n\n\n<li>\u518d\u6309\u5b57\u7b26\u5347\u5e8f<\/li>\n<\/ul>\n\n\n\n<p>\u4f60\u53ea\u8981\u6309\u8fd9\u4e09\u6b65\u62c6\uff0c\u5f88\u591a <code>sort(key=lambda ...)<\/code> \u90fd\u80fd\u770b\u61c2\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u672c\u8282\u5c0f\u7ed3<\/h2>\n\n\n\n<p>\u8fd9\u53e5\u4ee3\u7801\u6700\u672c\u8d28\u7684\u542b\u4e49\uff0c\u4e0d\u662f\u201c\u67d0\u4e2a\u795e\u79d8\u8bed\u6cd5\u201d\uff0c\u800c\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u4eba\u4e3a\u6784\u9020\u4e00\u4e2a\u6392\u5e8f\u4f9d\u636e\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u91cc\u9762\u6bcf\u4e00\u90e8\u5206\u90fd\u5728\u670d\u52a1\u540c\u4e00\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>items.sort()<\/code>\uff1a\u7ed9\u5217\u8868\u6392\u5e8f<\/li>\n\n\n\n<li><code>key=<\/code>\uff1a\u6307\u5b9a\u6392\u5e8f\u89c4\u5219<\/li>\n\n\n\n<li><code>lambda x:<\/code>\uff1a\u4e34\u65f6\u5199\u4e00\u4e2a\u5c0f\u51fd\u6570<\/li>\n\n\n\n<li><code>x[1]<\/code>\uff1a\u53d6\u6b21\u6570<\/li>\n\n\n\n<li><code>-x[1]<\/code>\uff1a\u8ba9\u6b21\u6570\u5b9e\u73b0\u964d\u5e8f\u6548\u679c<\/li>\n\n\n\n<li><code>x[0]<\/code>\uff1a\u53d6\u5b57\u7b26<\/li>\n\n\n\n<li><code>(-x[1], x[0])<\/code>\uff1a\u5148\u6bd4\u6b21\u6570\uff0c\u518d\u6bd4\u5b57\u6bcd<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u53e5\u4ee3\u7801\u4e0d\u662f\u201c\u80cc\u4e0b\u6765\u201d\uff0c\u800c\u662f\u5e94\u8be5\u8bfb\u6210\uff1a<\/p>\n\n\n\n<p><strong>\u6309\u7167\u201c\u6b21\u6570\u4ece\u5927\u5230\u5c0f\u3001\u5b57\u6bcd\u4ece\u5c0f\u5230\u5927\u201d\u7684\u89c4\u5219\u6392\u5e8f\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7ec3\u4e60<\/h2>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u5148\u81ea\u5df1\u601d\u8003\u4e0b\u9762\u8fd9\u51e0\u4e2a <code>key<\/code> \u5206\u522b\u8868\u793a\u4ec0\u4e48\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 1<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: x&#91;1])\n<\/code><\/pre>\n\n\n\n<p>\u63d0\u793a\uff1a\u8fd9\u91cc\u53ea\u770b\u6b21\u6570\uff0c\u800c\u4e14\u662f\u9ed8\u8ba4\u5347\u5e8f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 2<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: -x&#91;1])\n<\/code><\/pre>\n\n\n\n<p>\u63d0\u793a\uff1a\u8fd9\u91cc\u53ea\u770b\u6b21\u6570\uff0c\u800c\u4e14\u662f\u964d\u5e8f\uff0c\u4e0d\u7ba1\u5b57\u7b26\u987a\u5e8f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 3<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (x&#91;0], -x&#91;1]))\n<\/code><\/pre>\n\n\n\n<p>\u63d0\u793a\uff1a\u8fd9\u6b21\u6bd4\u8f83\u987a\u5e8f\u548c\u539f\u9898\u4e0d\u4e00\u6837\u4e86\u3002\u5148\u60f3\u4e00\u60f3\uff0c\u5b83\u4f1a\u5148\u6309\u4ec0\u4e48\u6392\uff0c\u518d\u6309\u4ec0\u4e48\u6392\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u5f88\u591a\u4eba\u4f1a\u5361\u5728 <code>lambda<\/code><\/h2>\n\n\n\n<p>\u4f60\u73b0\u5728\u5361\u4f4f\u7684\uff0c\u5176\u5b9e\u4e0d\u662f\u6392\u5e8f\u672c\u8eab\uff0c\u800c\u662f\u8fd9\u4e2a\u611f\u89c9\uff1a<\/p>\n\n\n\n<p>\u201c\u4e3a\u4ec0\u4e48\u8fd9\u91cc\u4e0d\u7528\u5148\u5199\u4e00\u4e2a <code>def<\/code> \u51fd\u6570\uff0c\u518d\u628a\u51fd\u6570\u540d\u4f20\u8fdb\u53bb\uff1f\u4e3a\u4ec0\u4e48\u4e00\u4e2a <code>lambda<\/code> \u8868\u8fbe\u5f0f\uff0c\u5c45\u7136\u53ef\u4ee5\u76f4\u63a5\u585e\u8fdb <code>sort(key=...)<\/code> \u91cc\u9762\uff1f\u201d<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u95ee\u9898\u95ee\u5f97\u975e\u5e38\u597d\u3002\u56e0\u4e3a\u4e00\u65e6\u8fd9\u91cc\u60f3\u901a\uff0c\u540e\u9762\u4f60\u770b\u5f88\u591a Python \u4ee3\u7801\u90fd\u4f1a\u987a\u5f88\u591a\u3002<\/p>\n\n\n\n<p>\u8fd9\u8282\u6211\u4eec\u5c31\u4e0d\u6025\u7740\u56de\u5230\u539f\u9898\uff0c\u5148\u628a <code>lambda<\/code> \u672c\u8eab\u8bb2\u900f\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5148\u8bf4\u7ed3\u8bba\uff1a<code>lambda<\/code> \u672c\u8d28\u4e0a\u5c31\u662f\u51fd\u6570<\/h2>\n\n\n\n<p>\u6700\u6838\u5fc3\u7684\u4e00\u53e5\u8bdd\u662f\uff1a<\/p>\n\n\n\n<p><strong><code>lambda<\/code> \u4e0d\u662f\u7279\u6b8a\u7684\u6570\u636e\uff0c\u4e0d\u662f\u9b54\u6cd5\u8bed\u6cd5\uff0c\u5b83\u672c\u8d28\u4e0a\u5c31\u662f\u4e00\u4e2a\u51fd\u6570\u5bf9\u8c61\u3002<\/strong><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0cPython \u770b\u5230\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda x: x + 1\n<\/code><\/pre>\n\n\n\n<p>\u4f1a\u628a\u5b83\u5f53\u6210\u4e00\u4e2a\u201c\u51fd\u6570\u201d\u3002<\/p>\n\n\n\n<p>\u5b83\u548c\u4e0b\u9762\u8fd9\u4e2a\u666e\u901a\u51fd\u6570\uff0c\u5728\u4f5c\u7528\u4e0a\u5f88\u50cf\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def add_one(x):\n    return x + 1\n<\/code><\/pre>\n\n\n\n<p>\u53ea\u662f\u5199\u6cd5\u66f4\u77ed\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u4f60\u4e4b\u6240\u4ee5\u80fd\u628a <code>lambda<\/code> \u585e\u8fdb <code>sort(key=...)<\/code>\uff0c\u672c\u8d28\u539f\u56e0\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong><code>key=<\/code> \u9700\u8981\u7684\u672c\u6765\u5c31\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u800c <code>lambda<\/code> \u6070\u597d\u4e5f\u4f1a\u4ea7\u751f\u4e00\u4e2a\u51fd\u6570\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5148\u522b\u770b <code>sort<\/code>\uff0c\u5148\u770b\u51fd\u6570\u5230\u5e95\u80fd\u4e0d\u80fd\u201c\u5f53\u4e1c\u897f\u4f20\u6765\u4f20\u53bb\u201d<\/h2>\n\n\n\n<p>\u8fd9\u662f\u7406\u89e3 <code>lambda<\/code> \u7684\u524d\u63d0\u3002<\/p>\n\n\n\n<p>\u5728 Python \u91cc\uff0c\u51fd\u6570\u4e0d\u53ea\u662f\u201c\u80fd\u6267\u884c\u7684\u4e00\u6bb5\u4ee3\u7801\u201d\uff0c\u51fd\u6570\u672c\u8eab\u4e5f\u53ef\u4ee5\u5f53\u6210\u4e00\u4e2a\u503c\u3002<\/p>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u628a\u5b83\u7406\u89e3\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u5b57\u53ef\u4ee5\u8d4b\u503c\u7ed9\u53d8\u91cf<\/li>\n\n\n\n<li>\u5b57\u7b26\u4e32\u53ef\u4ee5\u8d4b\u503c\u7ed9\u53d8\u91cf<\/li>\n\n\n\n<li>\u5217\u8868\u53ef\u4ee5\u8d4b\u503c\u7ed9\u53d8\u91cf<\/li>\n\n\n\n<li><strong>\u51fd\u6570\u4e5f\u53ef\u4ee5\u8d4b\u503c\u7ed9\u53d8\u91cf<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def add_one(x):\n    return x + 1\n\nf = add_one\nprint(f(5))\n<\/code><\/pre>\n\n\n\n<p>\u8f93\u51fa\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>6\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u8981\u6ce8\u610f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>f = add_one\n<\/code><\/pre>\n\n\n\n<p>\u4e0d\u662f\u5728\u8c03\u7528\u51fd\u6570\uff0c\u800c\u662f\u5728\u8bf4\uff1a<\/p>\n\n\n\n<p><strong>\u628a\u51fd\u6570 <code>add_one<\/code> \u672c\u8eab\u4ea4\u7ed9\u53d8\u91cf <code>f<\/code>\u3002<\/strong><\/p>\n\n\n\n<p>\u6240\u4ee5\u540e\u9762\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>f(5)\n<\/code><\/pre>\n\n\n\n<p>\u5c31\u76f8\u5f53\u4e8e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>add_one(5)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u8bf4\u660e\u4e00\u4ef6\u5f88\u91cd\u8981\u7684\u4e8b\uff1a<\/p>\n\n\n\n<p><strong>\u51fd\u6570\u5728 Python \u91cc\u662f\u201c\u7b2c\u4e00\u7c7b\u5bf9\u8c61\u201d<\/strong>\u3002<br>\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u53ef\u4ee5\u50cf\u666e\u901a\u503c\u4e00\u6837\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8d4b\u503c\u7ed9\u53d8\u91cf<\/li>\n\n\n\n<li>\u4f5c\u4e3a\u53c2\u6570\u4f20\u7ed9\u522b\u7684\u51fd\u6570<\/li>\n\n\n\n<li>\u4f5c\u4e3a\u8fd4\u56de\u503c\u8fd4\u56de\u51fa\u53bb<\/li>\n<\/ol>\n\n\n\n<p>\u800c <code>sort(key=...)<\/code> \u6b63\u662f\u5229\u7528\u4e86\u7b2c 2 \u70b9\uff1a<strong>\u628a\u4e00\u4e2a\u51fd\u6570\u4f20\u7ed9\u53e6\u4e00\u4e2a\u51fd\u6570\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5148\u7406\u89e3\uff1a<code>sort(key=...)<\/code> \u5230\u5e95\u60f3\u8981\u4ec0\u4e48<\/h2>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>words = &#91;'apple', 'kiwi', 'banana']\nwords.sort(key=len)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u7684 <code>key=len<\/code>\uff0c\u4e0d\u662f\u5728\u8ba9 <code>len<\/code> \u7acb\u523b\u6267\u884c\u4e00\u904d\u6240\u6709\u5185\u5bb9\u3002<\/p>\n\n\n\n<p>\u800c\u662f\u5728\u544a\u8bc9 <code>sort<\/code>\uff1a<\/p>\n\n\n\n<p>\u201c\u7b49\u4f1a\u513f\u4f60\u81ea\u5df1\u53bb\u6392\u5e8f\u7684\u65f6\u5019\uff0c\u6bcf\u62ff\u5230\u4e00\u4e2a\u5143\u7d20\uff0c\u5c31\u8c03\u7528\u4e00\u4e0b <code>len<\/code>\uff0c\u770b\u770b\u8fd9\u4e2a\u5143\u7d20\u7684\u957f\u5ea6\uff0c\u628a\u957f\u5ea6\u4f5c\u4e3a\u6bd4\u8f83\u4f9d\u636e\u3002\u201d<\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c<code>sort<\/code> \u60f3\u8981\u7684\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u4e00\u4e2a\u201c\u62ff\u5230\u5143\u7d20\u540e\uff0c\u80fd\u8fd4\u56de\u6bd4\u8f83\u4f9d\u636e\u201d\u7684\u51fd\u6570\u3002<\/strong><\/p>\n\n\n\n<p>\u8fd9\u4e2a\u51fd\u6570\u53ef\u4ee5\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5185\u7f6e\u51fd\u6570 <code>len<\/code><\/li>\n\n\n\n<li>\u4f60\u81ea\u5df1\u7528 <code>def<\/code> \u5199\u7684\u51fd\u6570<\/li>\n\n\n\n<li>\u4e5f\u53ef\u4ee5\u662f <code>lambda<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5 <code>key=<\/code> \u540e\u9762\u5e76\u4e0d\u8981\u6c42\u201c\u5fc5\u987b\u5199\u51fd\u6570\u540d\u201d\uff0c\u5b83\u8981\u6c42\u7684\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u7ed9\u6211\u4e00\u4e2a\u51fd\u6570\u5c31\u884c\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48 <code>def<\/code> \u80fd\u4f20\u8fdb\u53bb<\/h2>\n\n\n\n<p>\u5148\u770b\u666e\u901a\u5199\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items = &#91;('a', 2), ('b', 3), ('c', 2)]\n\ndef rule(x):\n    return (-x&#91;1], x&#91;0])\n\nitems.sort(key=rule)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u7684 <code>rule<\/code> \u662f\u4e00\u4e2a\u51fd\u6570\u3002<br><code>sort<\/code> \u5728\u6392\u5e8f\u65f6\uff0c\u4f1a\u53cd\u590d\u505a\u7c7b\u4f3c\u8fd9\u6837\u7684\u4e8b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5bf9 <code>('a', 2)<\/code> \u8c03\u7528 <code>rule(('a', 2))<\/code><\/li>\n\n\n\n<li>\u5bf9 <code>('b', 3)<\/code> \u8c03\u7528 <code>rule(('b', 3))<\/code><\/li>\n\n\n\n<li>\u5bf9 <code>('c', 2)<\/code> \u8c03\u7528 <code>rule(('c', 2))<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u5f97\u5230\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>(-2, 'a')<\/code><\/li>\n\n\n\n<li><code>(-3, 'b')<\/code><\/li>\n\n\n\n<li><code>(-2, 'c')<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u7136\u540e\u6309\u8fd9\u4e9b\u7ed3\u679c\u53bb\u6392\u5e8f\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=rule)\n<\/code><\/pre>\n\n\n\n<p>\u610f\u601d\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u628a\u51fd\u6570 <code>rule<\/code> \u4ea4\u7ed9 <code>sort<\/code>\uff0c\u8ba9\u5b83\u5728\u5185\u90e8\u4f7f\u7528\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><code>lambda<\/code> \u4e3a\u4ec0\u4e48\u4e5f\u80fd\u4f20\u8fdb\u53bb<\/h2>\n\n\n\n<p>\u56e0\u4e3a <code>lambda<\/code> \u5199\u51fa\u6765\u7684\u7ed3\u679c\uff0c\u672c\u8eab\u4e5f\u662f\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda x: (-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u628a\u5b83\u7406\u89e3\u6210\uff1a<\/p>\n\n\n\n<p>\u201c\u73b0\u573a\u76f4\u63a5\u521b\u5efa\u4e86\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u63a5\u6536\u53c2\u6570 <code>x<\/code>\uff0c\u8fd4\u56de <code>(-x[1], x[0])<\/code>\u3002\u201d<\/p>\n\n\n\n<p>\u5b83\u51e0\u4e4e\u7b49\u4ef7\u4e8e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def rule(x):\n    return (-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u672c\u8d28\u4e0a\u5c31\u662f\uff1a<\/p>\n\n\n\n<p>\u201c\u6211\u61d2\u5f97\u5148\u5355\u72ec\u5199\u4e00\u4e2a <code>def rule(x): ...<\/code>\uff0c\u6211\u5c31\u5728\u8fd9\u91cc\u4e34\u65f6\u9020\u4e00\u4e2a\u51fd\u6570\uff0c\u76f4\u63a5\u4f20\u7ed9 <code>sort<\/code>\u3002\u201d<\/p>\n\n\n\n<p>\u6240\u4ee5\u4e0d\u662f <code>lambda<\/code> \u88ab\u201c\u585e\u8fdb\u53bb\u4e86\u201d\uff0c\u800c\u662f\uff1a<\/p>\n\n\n\n<p><strong><code>lambda<\/code> \u521b\u5efa\u51fa\u7684\u90a3\u4e2a\u51fd\u6570\u5bf9\u8c61\uff0c\u88ab\u4f20\u7ed9\u4e86 <code>sort<\/code>\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f60\u53ef\u4ee5\u628a\u5b83\u62c6\u6210\u4e24\u6b65\u770b<\/h2>\n\n\n\n<p>\u5f88\u591a\u4eba\u4e4b\u6240\u4ee5\u89c9\u5f97\u795e\u79d8\uff0c\u662f\u56e0\u4e3a\u5b83\u4e00\u884c\u5199\u5b8c\u4e86\u3002<\/p>\n\n\n\n<p>\u5176\u5b9e\u4f60\u53ef\u4ee5\u628a\u5b83\u62c6\u5f00\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5199\u6cd5 1\uff1a\u5148\u5b9a\u4e49\u51fd\u6570\uff0c\u518d\u4f20\u8fdb\u53bb<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>def rule(x):\n    return (-x&#91;1], x&#91;0])\n\nitems.sort(key=rule)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u5199\u6cd5 2\uff1a\u5148\u7528 lambda \u9020\u51fd\u6570\uff0c\u518d\u8d4b\u503c\u7ed9\u53d8\u91cf<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>rule = lambda x: (-x&#91;1], x&#91;0])\nitems.sort(key=rule)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u5199\u6cd5 3\uff1a\u76f4\u63a5\u73b0\u573a\u521b\u5efa\u5e76\u4f20\u8fdb\u53bb<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e09\u79cd\u5199\u6cd5\uff0c\u4ece\u672c\u8d28\u4e0a\u8bf4\uff0c\u505a\u7684\u662f\u540c\u4e00\u4ef6\u4e8b\u3002<\/p>\n\n\n\n<p>\u533a\u522b\u53ea\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c\u4e00\u79cd\u6700\u5b8c\u6574\uff0c\u6700\u9002\u5408\u521d\u5b66\u7406\u89e3<\/li>\n\n\n\n<li>\u7b2c\u4e8c\u79cd\u8bf4\u660e <code>lambda<\/code> \u771f\u7684\u53ef\u4ee5\u5148\u5b58\u8d77\u6765<\/li>\n\n\n\n<li>\u7b2c\u4e09\u79cd\u6700\u7b80\u6d01\uff0c\u9002\u5408\u201c\u8fd9\u4e2a\u51fd\u6570\u53ea\u7528\u4e00\u6b21\u201d\u7684\u573a\u666f<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e13\u95e8\u770b\u4e00\u4e0b\uff1a<code>lambda<\/code> \u5230\u5e95\u201c\u8fd4\u56de\u201d\u4e86\u4ec0\u4e48<\/h2>\n\n\n\n<p>\u5f88\u591a\u4eba\u8bef\u4ee5\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>key=lambda x: (-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u662f\u5728\u628a\u201c\u8ba1\u7b97\u7ed3\u679c\u201d\u4f20\u8fdb\u53bb\u3002<\/p>\n\n\n\n<p>\u5176\u5b9e\u4e0d\u662f\u3002<\/p>\n\n\n\n<p>\u8fd9\u91cc\u4f20\u8fdb\u53bb\u7684\u4e0d\u662f\u67d0\u4e2a\u7ed3\u679c\uff0c\u800c\u662f\u4e00\u4e2a<strong>\u51fd\u6570<\/strong>\u3002<\/p>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u505a\u4e2a\u6982\u5ff5\u4e0a\u7684\u7c7b\u6bd4\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>f = lambda x: x + 1\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e0d\u662f\u5728\u7b97 <code>x + 1<\/code>\uff0c\u56e0\u4e3a\u6b64\u65f6\u8fde <code>x<\/code> \u662f\u8c01\u90fd\u8fd8\u4e0d\u77e5\u9053\u3002<\/p>\n\n\n\n<p>\u8fd9\u53e5\u8bdd\u7684\u610f\u601d\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u521b\u5efa\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u4ee5\u540e\u63a5\u6536\u4e00\u4e2a\u53c2\u6570 <code>x<\/code>\uff0c\u5e76\u8fd4\u56de <code>x + 1<\/code>\u3002<\/strong><\/p>\n\n\n\n<p>\u6240\u4ee5\u540c\u6837\u5730\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda x: (-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u4e0d\u662f\u7acb\u523b\u53bb\u8ba1\u7b97\u67d0\u4e2a\u5177\u4f53\u5143\u7ec4\u3002<\/p>\n\n\n\n<p>\u5b83\u662f\u5728\u5b9a\u4e49\u4e00\u79cd\u89c4\u5219\uff1a<\/p>\n\n\n\n<p>\u201c\u4ee5\u540e\u5982\u679c\u6709\u4eba\u7ed9\u6211\u4e00\u4e2a <code>x<\/code>\uff0c\u6211\u5c31\u8fd4\u56de <code>(-x[1], x[0])<\/code>\u3002\u201d<\/p>\n\n\n\n<p>\u800c <code>sort<\/code> \u5c31\u662f\u90a3\u4e2a\u201c\u4ee5\u540e\u4f1a\u7ed9\u4f60 <code>x<\/code> \u7684\u4eba\u201d\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><code>sort<\/code> \u548c <code>lambda<\/code> \u662f\u600e\u4e48\u914d\u5408\u7684<\/h2>\n\n\n\n<p>\u73b0\u5728\u628a\u4e24\u8005\u63a5\u8d77\u6765\u770b\u3002<\/p>\n\n\n\n<p>\u5047\u8bbe\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items = &#91;('a', 2), ('b', 3), ('c', 2)]\n<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\u4f60\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u53ef\u4ee5\u628a\u5b83\u60f3\u8c61\u6210\u4e0b\u9762\u8fd9\u79cd\u8fc7\u7a0b\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u4f60\u7ed9 <code>sort<\/code> \u4e00\u4e2a\u51fd\u6570<\/h3>\n\n\n\n<p>\u8fd9\u4e2a\u51fd\u6570\u7684\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x -&gt; (-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a<code>sort<\/code> \u81ea\u5df1\u904d\u5386\u5217\u8868\u5143\u7d20<\/h3>\n\n\n\n<p>\u5b83\u5185\u90e8\u4f1a\u628a\u6bcf\u4e2a\u5143\u7d20\u62ff\u51fa\u6765\uff0c\u4ea4\u7ed9\u8fd9\u4e2a\u51fd\u6570\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>x = ('a', 2)<\/code>\uff0c\u5f97\u5230 <code>(-2, 'a')<\/code><\/li>\n\n\n\n<li><code>x = ('b', 3)<\/code>\uff0c\u5f97\u5230 <code>(-3, 'b')<\/code><\/li>\n\n\n\n<li><code>x = ('c', 2)<\/code>\uff0c\u5f97\u5230 <code>(-2, 'c')<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1a<code>sort<\/code> \u6309\u8fd9\u4e9b\u7ed3\u679c\u6392\u5e8f<\/h3>\n\n\n\n<p>\u4e8e\u662f\u539f\u5217\u8868\u53d8\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;('b', 3), ('a', 2), ('c', 2)]\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\u771f\u6b63\u7684\u5206\u5de5\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>lambda<\/code> \u8d1f\u8d23\u201c\u63d0\u4f9b\u89c4\u5219\u201d<\/li>\n\n\n\n<li><code>sort<\/code> \u8d1f\u8d23\u201c\u8c03\u7528\u89c4\u5219\u5e76\u6392\u5e8f\u201d<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u8bf4\u5b83\u50cf\u201c\u4e34\u65f6\u51fd\u6570\u201d<\/h2>\n\n\n\n<p>\u56e0\u4e3a\u5b83\u901a\u5e38\u6ca1\u6709\u540d\u5b57\uff0c\u800c\u4e14\u53ea\u7528\u4e00\u6b21\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\u5019\u8fd9\u4e2a\u51fd\u6570\u53ea\u662f\u4e3a\u4e86\u8fd9\u4e00\u6b21\u6392\u5e8f\u670d\u52a1\u3002<\/p>\n\n\n\n<p>\u6392\u5e8f\u7ed3\u675f\u540e\uff0c\u4f60\u4e5f\u4e0d\u6253\u7b97\u4ee5\u540e\u518d\u5355\u72ec\u8c03\u7528\u5b83\uff0c\u6bd4\u5982\u4e0d\u4f1a\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u8fd9\u4e2a\u51fd\u6570\u4e0b\u6b21\u6211\u8fd8\u8981\u7528\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u91cc\u6700\u81ea\u7136\u7684\u5199\u6cd5\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u73b0\u573a\u5b9a\u4e49\uff0c\u73b0\u573a\u4f7f\u7528\u3002<\/strong><\/p>\n\n\n\n<p>\u8fd9\u5c31\u662f\u201c\u4e34\u65f6\u51fd\u6570\u201d\u7684\u611f\u89c9\u3002<\/p>\n\n\n\n<p>\u800c\u5982\u679c\u67d0\u4e2a\u51fd\u6570\u4f1a\u591a\u6b21\u7528\u5230\uff0c\u6216\u8005\u903b\u8f91\u6bd4\u8f83\u590d\u6742\uff0c\u5c31\u66f4\u9002\u5408\u7528 <code>def<\/code> \u5355\u72ec\u5199\u51fa\u6765\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><code>lambda<\/code> \u548c <code>def<\/code> \u7684\u771f\u6b63\u5173\u7cfb<\/h2>\n\n\n\n<p>\u5f88\u591a\u521d\u5b66\u8005\u4f1a\u4ee5\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>def<\/code> \u662f\u5b9a\u4e49\u51fd\u6570<\/li>\n\n\n\n<li><code>lambda<\/code> \u662f\u53e6\u5916\u4e00\u79cd\u5947\u602a\u4e1c\u897f<\/li>\n<\/ul>\n\n\n\n<p>\u5176\u5b9e\u66f4\u51c6\u786e\u7684\u7406\u89e3\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>def<\/code> \u548c <code>lambda<\/code> \u90fd\u80fd\u4ea7\u751f\u51fd\u6570<\/li>\n\n\n\n<li>\u53ea\u662f\u4f7f\u7528\u573a\u666f\u4e0d\u540c<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><code>def<\/code> \u66f4\u9002\u5408\uff1a<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u903b\u8f91\u6bd4\u8f83\u957f<\/li>\n\n\n\n<li>\u9700\u8981\u591a\u884c\u4ee3\u7801<\/li>\n\n\n\n<li>\u9700\u8981\u5199\u6ce8\u91ca<\/li>\n\n\n\n<li>\u4ee5\u540e\u8fd8\u8981\u91cd\u590d\u4f7f\u7528<\/li>\n\n\n\n<li>\u60f3\u7ed9\u51fd\u6570\u4e00\u4e2a\u6b63\u5f0f\u540d\u5b57<\/li>\n<\/ol>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def is_even(x):\n    return x % 2 == 0\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><code>lambda<\/code> \u66f4\u9002\u5408\uff1a<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u903b\u8f91\u5f88\u77ed<\/li>\n\n\n\n<li>\u53ea\u662f\u4e00\u53e5\u7b80\u5355\u8868\u8fbe\u5f0f<\/li>\n\n\n\n<li>\u53ea\u7528\u4e00\u6b21<\/li>\n\n\n\n<li>\u5199\u5728\u53c2\u6570\u4f4d\u7f6e\u66f4\u65b9\u4fbf<\/li>\n<\/ol>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>nums.sort(key=lambda x: x % 10)\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\u4f60\u53ef\u4ee5\u628a\u5b83\u4eec\u7406\u89e3\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>def<\/code>\uff1a\u6b63\u5f0f\u5b9a\u4e49\u51fd\u6570<\/li>\n\n\n\n<li><code>lambda<\/code>\uff1a\u5feb\u901f\u5199\u4e00\u4e2a\u4e00\u6b21\u6027\u5c0f\u51fd\u6570<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48 <code>lambda<\/code> \u53ea\u80fd\u5199\u4e00\u6761\u201c\u8868\u8fbe\u5f0f\u201d<\/h2>\n\n\n\n<p>\u8fd9\u4e5f\u662f\u4f60\u4ee5\u540e\u4f1a\u6ce8\u610f\u5230\u7684\u4e00\u70b9\u3002<\/p>\n\n\n\n<p><code>lambda<\/code> \u540e\u9762\u4e0d\u80fd\u5199\u5f88\u591a\u884c\u590d\u6742\u903b\u8f91\uff0c\u6bd4\u5982\u4e0d\u80fd\u8fd9\u6837\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda x:\n    y = x + 1\n    return y\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u662f\u4e0d\u884c\u7684\u3002<\/p>\n\n\n\n<p><code>lambda<\/code> \u53ea\u80fd\u5199\u6210\u8fd9\u79cd\u98ce\u683c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda \u53c2\u6570: \u8868\u8fbe\u5f0f\n<\/code><\/pre>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda x: x + 1\nlambda x: x&#91;1]\nlambda x: (-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c<code>lambda<\/code> \u66f4\u50cf\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u5feb\u901f\u5199\u4e00\u4e2a\u201c\u8f93\u5165 -&gt; \u8f93\u51fa\u201d\u7684\u5c0f\u89c4\u5219\u3002<\/strong><\/p>\n\n\n\n<p>\u8fd9\u5c31\u7279\u522b\u9002\u5408 <code>sort(key=...)<\/code> \u8fd9\u79cd\u573a\u666f\uff0c\u56e0\u4e3a <code>key<\/code> \u672c\u6765\u5c31\u53ea\u9700\u8981\u4e00\u4e2a\u201c\u4ece\u5143\u7d20\u63d0\u53d6\u6bd4\u8f83\u4f9d\u636e\u201d\u7684\u7b80\u5355\u51fd\u6570\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u4e2a\u975e\u5e38\u5173\u952e\u7684\u533a\u5206\uff1a\u4f20\u51fd\u6570 \u548c \u8c03\u51fd\u6570<\/h2>\n\n\n\n<p>\u8fd9\u662f\u7406\u89e3 <code>lambda<\/code> \u548c <code>key<\/code> \u7684\u6838\u5fc3\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f20\u51fd\u6570<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=rule)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u662f\u628a\u51fd\u6570 <code>rule<\/code> \u4f20\u8fdb\u53bb\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8c03\u51fd\u6570<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>rule(x)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u624d\u662f\u8c03\u7528\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u540c\u6837\u5730\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f20 lambda \u4ea7\u751f\u7684\u51fd\u6570<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u4f20\u8fdb\u53bb\u7684\u662f\u4e00\u4e2a\u51fd\u6570\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p>\u800c\u4e0d\u662f\u4f60\u81ea\u5df1\u5728\u5916\u9762\u8c03\u7528\u5b83\u3002<\/p>\n\n\n\n<p>\u771f\u6b63\u8c03\u7528\u5b83\u7684\u662f <code>sort<\/code> \u5185\u90e8\u3002<\/p>\n\n\n\n<p>\u8fd9\u70b9\u4e00\u5b9a\u8981\u5206\u6e05\uff1a<\/p>\n\n\n\n<p><strong>\u4f60\u4e0d\u662f\u5728\u5916\u9762\u5148\u7b97\u5b8c\uff0c\u518d\u628a\u7ed3\u679c\u4ea4\u7ed9 <code>sort<\/code>\u3002\u4f60\u662f\u5728\u628a\u201c\u600e\u4e48\u7b97\u201d\u7684\u89c4\u5219\u4ea4\u7ed9 <code>sort<\/code>\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7528\u4e00\u4e2a\u751f\u6d3b\u7c7b\u6bd4\u7406\u89e3<\/h2>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u628a <code>sort<\/code> \u60f3\u6210\u4e00\u4e2a\u201c\u6574\u7406\u5458\u201d\u3002<\/p>\n\n\n\n<p>\u5b83\u4f1a\u95ee\u4f60\uff1a<\/p>\n\n\n\n<p>\u201c\u8fd9\u4e9b\u4e1c\u897f\u6211\u8be5\u6309\u4ec0\u4e48\u6807\u51c6\u6574\u7406\uff1f\u201d<\/p>\n\n\n\n<p>\u4f60\u56de\u7b54\u5b83\u7684\u65b9\u5f0f\uff0c\u4e0d\u662f\u76f4\u63a5\u7ed9\u6700\u7ec8\u7b54\u6848\uff0c\u800c\u662f\u7ed9\u5b83\u4e00\u4e2a\u89c4\u5219\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6309\u957f\u5ea6\u6392<\/li>\n\n\n\n<li>\u6309\u6700\u540e\u4e00\u4e2a\u5b57\u6bcd\u6392<\/li>\n\n\n\n<li>\u6309\u6b21\u6570\u4ece\u5927\u5230\u5c0f\u3001\u5b57\u6bcd\u4ece\u5c0f\u5230\u5927\u6392<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e2a\u201c\u89c4\u5219\u201d\u5c31\u662f <code>key<\/code> \u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u800c <code>lambda<\/code> \u53ea\u662f\u4f60\u628a\u89c4\u5219\u5199\u51fa\u6765\u7684\u4e00\u79cd\u7b80\u6d01\u65b9\u5f0f\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u5c31\u50cf\u662f\u5728\u5bf9\u6574\u7406\u5458\u8bf4\uff1a<\/p>\n\n\n\n<p>\u201c\u6bcf\u4e2a\u5143\u7d20\u4f60\u90fd\u628a\u5b83\u770b\u6210 <code>(-\u6b21\u6570, \u5b57\u7b26)<\/code>\uff0c\u518d\u53bb\u6392\u5e8f\u3002\u201d<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u518d\u770b\u51e0\u4e2a\u6700\u5c0f\u4f8b\u5b50\uff0c\u5e2e\u52a9\u4f60\u5f7b\u5e95\u5efa\u7acb\u611f\u89c9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f8b 1\uff1a\u6309\u6570\u5b57\u672c\u8eab\u6392\u5e8f<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>nums = &#91;30, 12, 25, 41]\nnums.sort(key=lambda x: x)\nprint(nums)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc <code>lambda x: x<\/code> \u7684\u610f\u601d\u662f\uff1a<\/p>\n\n\n\n<p>\u201c\u6bcf\u4e2a\u5143\u7d20\u5c31\u6309\u5b83\u81ea\u5df1\u6765\u6bd4\u8f83\u3002\u201d<\/p>\n\n\n\n<p>\u5176\u5b9e\u548c\u9ed8\u8ba4\u6392\u5e8f\u5dee\u4e0d\u591a\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f8b 2\uff1a\u6309\u4e2a\u4f4d\u6570\u6392\u5e8f<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>nums = &#91;30, 12, 25, 41]\nnums.sort(key=lambda x: x % 10)\nprint(nums)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u4e0d\u662f\u6309\u6570\u5b57\u5927\u5c0f\u6392\uff0c\u800c\u662f\u6309\u4e2a\u4f4d\u6570\u6392\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>30 -> 0<\/li>\n\n\n\n<li>12 -> 2<\/li>\n\n\n\n<li>25 -> 5<\/li>\n\n\n\n<li>41 -> 1<\/li>\n<\/ul>\n\n\n\n<p>\u6392\u5e8f\u4f9d\u636e\u53d8\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0, 2, 5, 1\n<\/code><\/pre>\n\n\n\n<p>\u4e8e\u662f\u7ed3\u679c\u4f1a\u6309\u4e2a\u4f4d\u6570\u987a\u5e8f\u91cd\u6392\u3002<\/p>\n\n\n\n<p>\u8fd9\u91cc\u66f4\u80fd\u770b\u51fa\uff1a<br><code>key<\/code> \u51fd\u6570\u4e0d\u662f\u201c\u6539\u6570\u636e\u201d\uff0c\u800c\u662f\u201c\u544a\u8bc9 sort \u7528\u4ec0\u4e48\u89d2\u5ea6\u770b\u6570\u636e\u201d\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f8b 3\uff1a\u6309\u5b57\u7b26\u4e32\u957f\u5ea6\u6392\u5e8f<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>words = &#91;'banana', 'kiwi', 'apple']\nwords.sort(key=lambda x: len(x))\nprint(words)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc <code>lambda x: len(x)<\/code> \u7684\u610f\u601d\u662f\uff1a<\/p>\n\n\n\n<p>\u201c\u4e0d\u8981\u6309\u5b57\u6bcd\u987a\u5e8f\u770b\u8fd9\u4e9b\u5355\u8bcd\uff0c\u800c\u8981\u6309\u957f\u5ea6\u770b\u3002\u201d<\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>'banana'<\/code> -> 6<\/li>\n\n\n\n<li><code>'kiwi'<\/code> -> 4<\/li>\n\n\n\n<li><code>'apple'<\/code> -> 5<\/li>\n<\/ul>\n\n\n\n<p>\u4e8e\u662f\u7ed3\u679c\u6309\u957f\u5ea6\u6392\u5217\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56de\u5230\u539f\u9898\u90a3\u53e5\u4ee3\u7801\uff0c\u4f60\u73b0\u5728\u5e94\u8be5\u600e\u4e48\u8bfb<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u73b0\u5728\u4f60\u53ef\u4ee5\u6309\u4e0b\u9762\u8fd9\u4e2a\u987a\u5e8f\u53bb\u7406\u89e3\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c 1 \u5c42\uff1a<code>sort<\/code> \u9700\u8981\u4e00\u4e2a\u51fd\u6570<\/h3>\n\n\n\n<p>\u5b83\u8981\u9760\u8fd9\u4e2a\u51fd\u6570\u51b3\u5b9a\u600e\u4e48\u6392\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c 2 \u5c42\uff1a<code>lambda x: ...<\/code> \u73b0\u573a\u9020\u4e86\u4e00\u4e2a\u51fd\u6570<\/h3>\n\n\n\n<p>\u8fd9\u4e2a\u51fd\u6570\u63a5\u6536\u5217\u8868\u91cc\u7684\u4e00\u4e2a\u5143\u7d20 <code>x<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c 3 \u5c42\uff1a\u8fd9\u4e2a\u51fd\u6570\u8fd4\u56de\u6392\u5e8f\u4f9d\u636e<\/h3>\n\n\n\n<p>\u8fd4\u56de\u7684\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6b21\u6570\u53d6\u8d1f\uff0c\u8fbe\u5230\u964d\u5e8f\u6548\u679c<\/li>\n\n\n\n<li>\u5b57\u7b26\u539f\u6837\uff0c\u8fbe\u5230\u5347\u5e8f\u6548\u679c<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c 4 \u5c42\uff1a<code>sort<\/code> \u81ea\u5df1\u53cd\u590d\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570<\/h3>\n\n\n\n<p>\u5bf9\u6bcf\u4e2a\u5143\u7d20\u90fd\u7b97\u51fa key\uff0c\u518d\u5b8c\u6210\u6392\u5e8f\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u6574\u53e5\u5e76\u4e0d\u662f\u9b54\u6cd5\uff0c\u800c\u53ea\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u628a\u4e00\u4e2a\u4e00\u6b21\u6027\u7684\u5c0f\u51fd\u6570\uff0c\u76f4\u63a5\u4f5c\u4e3a\u53c2\u6570\u4f20\u7ed9\u4e86 <code>sort<\/code>\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u672c\u8282\u5c0f\u7ed3<\/h2>\n\n\n\n<p>\u4f60\u6700\u8be5\u8bb0\u4f4f\u7684\u4e0d\u662f\u8bed\u6cd5\u5f62\u5f0f\uff0c\u800c\u662f\u8fd9\u4e2a\u601d\u60f3\uff1a<\/p>\n\n\n\n<p><strong>\u5728 Python \u91cc\uff0c\u51fd\u6570\u672c\u8eab\u4e5f\u53ef\u4ee5\u88ab\u5f53\u4f5c\u201c\u503c\u201d\u4f20\u6765\u4f20\u53bb\u3002<\/strong><\/p>\n\n\n\n<p>\u56e0\u6b64\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>sort(key=...)<\/code> \u9700\u8981\u4e00\u4e2a\u51fd\u6570<\/li>\n\n\n\n<li><code>def<\/code> \u80fd\u5b9a\u4e49\u51fd\u6570<\/li>\n\n\n\n<li><code>lambda<\/code> \u4e5f\u80fd\u5b9a\u4e49\u51fd\u6570<\/li>\n\n\n\n<li>\u6240\u4ee5 <code>lambda<\/code> \u53ef\u4ee5\u76f4\u63a5\u585e\u8fdb <code>sort(key=...)<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u628a\u8fd9\u4ef6\u4e8b\u538b\u7f29\u6210\u4e00\u53e5\u8bdd\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong><code>lambda<\/code> \u4e4b\u6240\u4ee5\u80fd\u76f4\u63a5\u5199\u8fdb <code>sort(key=...)<\/code>\uff0c\u662f\u56e0\u4e3a\u5b83\u672c\u6765\u5c31\u5728\u201c\u73b0\u573a\u521b\u5efa\u4e00\u4e2a\u51fd\u6570\u201d\uff0c\u800c <code>key<\/code> \u53c2\u6570\u8981\u7684\u6070\u597d\u5c31\u662f\u51fd\u6570\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7ec3\u4e60<\/h2>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u5148\u81ea\u5df1\u5224\u65ad\u4e0b\u9762\u4e09\u53e5\u5206\u522b\u5728\u505a\u4ec0\u4e48\uff0c\u4e0d\u6025\u7740\u5199\u7b54\u6848\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 1<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>nums.sort(key=lambda x: -x)\n<\/code><\/pre>\n\n\n\n<p>\u63d0\u793a\uff1a\u60f3\u4e00\u60f3\uff0c\u8fd9\u91cc\u7684 <code>lambda<\/code> \u8fd4\u56de\u7684\u662f\u4ec0\u4e48\uff0c\u5b83\u4f1a\u8ba9\u6570\u5b57\u6309\u4ec0\u4e48\u987a\u5e8f\u6392\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 2<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>words.sort(key=lambda x: x&#91;-1])\n<\/code><\/pre>\n\n\n\n<p>\u63d0\u793a\uff1a\u8fd9\u91cc\u662f\u6309\u5355\u8bcd\u7684\u54ea\u4e00\u90e8\u5206\u6392\u5e8f\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 3<\/h3>\n\n\n\n<p>\u628a\u4e0b\u9762\u8fd9\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u6539\u5199\u6210\u201c\u5148\u7528 <code>def<\/code> \u5b9a\u4e49\u51fd\u6570\uff0c\u518d\u4f20\u7ed9 <code>sort<\/code>\u201d\u7684\u5f62\u5f0f\u3002<\/p>\n\n\n\n<p>\u63d0\u793a\uff1a\u8fd9\u9053\u7ec3\u4e60\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u4e3a\u4e00\u65e6\u4f60\u80fd\u5728 <code>lambda<\/code> \u548c <code>def<\/code> \u4e4b\u95f4\u6765\u56de\u6539\u5199\uff0c\u8bf4\u660e\u4f60\u771f\u7684\u7406\u89e3\u4e86\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48 key=lambda x: \u2026 \u91cc\u5199\u7684\u662f x\uff0c\u4f46\u6211\u4eec\u4ece\u6765\u6ca1\u6709\u624b\u52a8\u7ed9\u5b83\u4f20\u53c2\u6570\uff0c\u5b83\u5230\u5e95\u662f\u8c01\u4f20\u8fdb\u6765\u7684\uff1f<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u8fd9\u53c8\u662f\u4e00\u4e2a\u5173\u952e\u95ee\u9898<\/h2>\n\n\n\n<p>\u4f60\u73b0\u5728\u95ee\u7684\u8fd9\u4e2a\u95ee\u9898\uff0c\u5df2\u7ecf\u975e\u5e38\u63a5\u8fd1\u672c\u8d28\u4e86\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u660e\u660e\u5199\u4e86\u4e00\u4e2a\u53c2\u6570 <code>x<\/code>\uff0c\u4f46\u6211\u4eec\u81ea\u5df1\u4ece\u5934\u5230\u5c3e\u90fd\u6ca1\u6709\u624b\u52a8\u5199\u8fc7\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda(\u67d0\u4e2a\u4e1c\u897f)\n<\/code><\/pre>\n\n\n\n<p>\u90a3\u8fd9\u4e2a <code>x<\/code> \u5230\u5e95\u662f\u8c01\u7ed9\u7684\uff1f<\/p>\n\n\n\n<p>\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u4e0d\u662f\u4f60\u4f20\u7684\uff0c\u662f <code>sort()<\/code> \u5728\u5185\u90e8\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u65f6\u4f20\u8fdb\u53bb\u7684\u3002<\/strong><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c<code>x<\/code> \u7684\u503c\u6765\u81ea <code>sort<\/code> \u6392\u5e8f\u8fc7\u7a0b\u4e2d\uff0c\u4f9d\u6b21\u62ff\u51fa\u6765\u7684\u5217\u8868\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u8fd9\u8282\u6211\u4eec\u5c31\u628a\u8fd9\u4ef6\u4e8b\u5f7b\u5e95\u8bb2\u900f\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5148\u7ed9\u4e00\u53e5\u6700\u76f4\u63a5\u7684\u4eba\u8bdd\u7248<\/h2>\n\n\n\n<p>\u5f53\u4f60\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u5176\u5b9e\u662f\u5728\u5bf9 Python \u8bf4\uff1a<\/p>\n\n\n\n<p>\u201c\u6211\u7ed9\u4f60\u4e00\u4e2a\u89c4\u5219\u51fd\u6570\u3002\u4f60\u5728\u6392\u5e8f <code>items<\/code> \u7684\u65f6\u5019\uff0c\u6bcf\u62ff\u5230\u4e00\u4e2a\u5143\u7d20\uff0c\u5c31\u628a\u8fd9\u4e2a\u5143\u7d20\u4f20\u7ed9\u8fd9\u4e2a\u51fd\u6570\u3002\u51fd\u6570\u53c2\u6570\u540d\u6211\u8fd9\u91cc\u5199\u6210 <code>x<\/code>\u3002\u201d<\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>x<\/code> \u4e0d\u662f\u4f60\u624b\u52a8\u4f20\u7684<\/li>\n\n\n\n<li><code>x<\/code> \u662f <code>sort()<\/code> \u5185\u90e8\u5e2e\u4f60\u4f20\u7684<\/li>\n\n\n\n<li><code>x<\/code> \u6bcf\u6b21\u90fd\u4f1a\u53d8\u6210\u5217\u8868\u4e2d\u7684\u4e00\u4e2a\u5143\u7d20<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5148\u56de\u5fc6\u4e00\u4e0b\uff1a\u51fd\u6570\u53c2\u6570\u4e0d\u4e00\u5b9a\u975e\u8981\u4f60\u4eb2\u624b\u4f20<\/h2>\n\n\n\n<p>\u5f88\u591a\u521d\u5b66\u8005\u8111\u5b50\u91cc\u9ed8\u8ba4\u6709\u4e00\u79cd\u5370\u8c61\uff1a<\/p>\n\n\n\n<p>\u201c\u51fd\u6570\u53c2\u6570\uff0c\u4e00\u5b9a\u8981\u6211\u81ea\u5df1\u5728\u62ec\u53f7\u91cc\u5199\u51fa\u6765\u3002\u201d<\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def add_one(n):\n    return n + 1\n\nprint(add_one(5))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u786e\u5b9e\u662f\u4f60\u624b\u52a8\u4f20\u4e86 <code>5<\/code> \u7ed9 <code>n<\/code>\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u4f60\u4f1a\u5f62\u6210\u4e00\u4e2a\u5370\u8c61\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>n<\/code> \u7684\u503c\u662f\u6211\u5199\u8fdb\u53bb\u7684<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e2a\u5370\u8c61\u6ca1\u9519\uff0c\u4f46\u5b83\u53ea\u662f\u201c\u6700\u5e38\u89c1\u60c5\u51b5\u201d\uff0c\u4e0d\u662f\u552f\u4e00\u60c5\u51b5\u3002<\/p>\n\n\n\n<p>\u56e0\u4e3a\u8fd8\u6709\u53e6\u4e00\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n<p><strong>\u4f60\u628a\u51fd\u6570\u4ea4\u7ed9\u522b\u7684\u51fd\u6570\uff0c\u90a3\u4e2a\u522b\u7684\u51fd\u6570\u4f1a\u66ff\u4f60\u8c03\u7528\u5b83\u3002<\/strong><\/p>\n\n\n\n<p>\u8fd9\u65f6\uff0c\u53c2\u6570\u5c31\u4e0d\u662f\u4f60\u4eb2\u624b\u4f20\uff0c\u800c\u662f\u201c\u5916\u5c42\u51fd\u6570\u201d\u5e2e\u4f60\u4f20\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5148\u770b\u4e00\u4e2a\u6700\u7b80\u5355\u7684\u7c7b\u6bd4<\/h2>\n\n\n\n<p>\u6211\u4eec\u5148\u81ea\u5df1\u5199\u4e00\u4e2a\u51fd\u6570\uff0c\u6a21\u62df\u8fd9\u79cd\u201c\u51fd\u6570\u91cc\u9762\u518d\u8c03\u7528\u51fd\u6570\u201d\u7684\u611f\u89c9\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def use_function(f):\n    print(f(10))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc <code>use_function<\/code> \u63a5\u6536\u4e00\u4e2a\u53c2\u6570 <code>f<\/code>\uff0c\u800c\u4e14\u5b83\u5047\u8bbe <code>f<\/code> \u662f\u4e00\u4e2a\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u7136\u540e\u5b83\u5185\u90e8\u505a\u4e86\u8fd9\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>f(10)\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c<strong>\u662f <code>use_function<\/code> \u5728\u8c03\u7528 <code>f<\/code>\uff0c\u5e76\u4e14\u7ed9\u5b83\u4f20\u4e86\u53c2\u6570 <code>10<\/code>\u3002<\/strong><\/p>\n\n\n\n<p>\u73b0\u5728\u6211\u4eec\u8fd9\u6837\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>use_function(lambda x: x + 1)\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u4f1a\u53d1\u73b0\u8fd9\u91cc\u6211\u4eec\u6ca1\u6709\u624b\u52a8\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(lambda x: x + 1)(10)\n<\/code><\/pre>\n\n\n\n<p>\u4f46\u7a0b\u5e8f\u4f9d\u7136\u80fd\u8fd0\u884c\u3002<\/p>\n\n\n\n<p>\u4e3a\u4ec0\u4e48\uff1f<\/p>\n\n\n\n<p>\u56e0\u4e3a\u8c03\u7528\u8fc7\u7a0b\u5b9e\u9645\u4e0a\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65<\/h3>\n\n\n\n<p>\u4f60\u628a\u8fd9\u4e2a\u51fd\u6570\u4ea4\u7ed9 <code>use_function<\/code>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda x: x + 1\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65<\/h3>\n\n\n\n<p><code>use_function<\/code> \u5185\u90e8\u81ea\u5df1\u8c03\u7528\u5b83\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>f(10)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65<\/h3>\n\n\n\n<p>\u4e8e\u662f\u8fd9\u4e2a <code>10<\/code> \u5c31\u53d8\u6210\u4e86 <code>lambda<\/code> \u91cc\u7684 <code>x<\/code><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x = 10\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\u7ed3\u679c\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>11\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4f8b\u5b50\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u548c <code>sort(key=...)<\/code> \u7684\u5173\u7cfb\u51e0\u4e4e\u4e00\u6a21\u4e00\u6837\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><code>sort(key=...)<\/code> \u672c\u8d28\u4e0a\u4e5f\u5728\u505a\u540c\u6837\u7684\u4e8b<\/h2>\n\n\n\n<p>\u5f53\u4f60\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u5e76\u4e0d\u662f\u4f60\u5728\u81ea\u5df1\u8c03\u7528\u8fd9\u4e2a lambda\u3002<\/p>\n\n\n\n<p>\u800c\u662f\u4f60\u628a\u8fd9\u4e2a lambda \u51fd\u6570\u4ea4\u7ed9\u4e86 <code>sort<\/code>\u3002<\/p>\n\n\n\n<p>\u7136\u540e <code>sort<\/code> \u5728\u5185\u90e8\u4f1a\u505a\u7c7b\u4f3c\u8fd9\u6837\u7684\u4e8b\u60c5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>key(\u67d0\u4e2a\u5217\u8868\u5143\u7d20)\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u771f\u6b63\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u7684\u662f <code>sort<\/code>\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5 <code>x<\/code> \u7684\u6765\u6e90\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong><code>sort<\/code> \u6bcf\u6b21\u62ff\u51fa\u6765\u5904\u7406\u7684\u90a3\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56de\u5230\u539f\u9898\uff0c<code>x<\/code> \u5230\u5e95\u53ef\u80fd\u662f\u8c01<\/h2>\n\n\n\n<p>\u5047\u8bbe\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items = &#91;('a', 2), ('b', 3), ('c', 2)]\n<\/code><\/pre>\n\n\n\n<p>\u90a3\u4e48\u6392\u5e8f\u65f6\uff0c<code>sort<\/code> \u4f1a\u4f9d\u6b21\u5904\u7406\u8fd9\u4e9b\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u4e8e\u662f\u67d0\u4e00\u6b21\u8c03\u7528\u65f6\uff0c\u53ef\u80fd\u76f8\u5f53\u4e8e\u505a\u4e86\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(lambda x: (-x&#91;1], x&#91;0]))(('a', 2))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x = ('a', 2)\n<\/code><\/pre>\n\n\n\n<p>\u518d\u4e0b\u4e00\u6b21\uff0c\u53ef\u80fd\u76f8\u5f53\u4e8e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(lambda x: (-x&#91;1], x&#91;0]))(('b', 3))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x = ('b', 3)\n<\/code><\/pre>\n\n\n\n<p>\u518d\u4e0b\u4e00\u6b21\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(lambda x: (-x&#91;1], x&#91;0]))(('c', 2))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x = ('c', 2)\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u91cc\u7684 <code>x<\/code> \u5e76\u4e0d\u662f\u4e00\u4e2a\u56fa\u5b9a\u503c\uff0c\u800c\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u6392\u5e8f\u8fc7\u7a0b\u4e2d\uff0c\u5f53\u524d\u6b63\u5728\u88ab\u5904\u7406\u7684\u90a3\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u6211\u4eec\u770b\u4e0d\u5230\u8fd9\u4e2a\u201c\u4f20\u53c2\u52a8\u4f5c\u201d<\/h2>\n\n\n\n<p>\u56e0\u4e3a\u8fd9\u4e2a\u52a8\u4f5c\u53d1\u751f\u5728 <code>sort()<\/code> \u7684\u5185\u90e8\u3002<\/p>\n\n\n\n<p>\u8fd9\u5c31\u50cf\u4f60\u7528\u6d17\u8863\u673a\u6d17\u8863\u670d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f60\u53ea\u8d1f\u8d23\u628a\u8863\u670d\u653e\u8fdb\u53bb\u3001\u6309\u6a21\u5f0f<\/li>\n\n\n\n<li>\u81f3\u4e8e\u6d17\u8863\u673a\u5185\u90e8\u4ec0\u4e48\u65f6\u5019\u8fdb\u6c34\u3001\u4ec0\u4e48\u65f6\u5019\u65cb\u8f6c\u3001\u4ec0\u4e48\u65f6\u5019\u7529\u5e72\uff0c\u4f60\u770b\u4e0d\u5230<\/li>\n<\/ul>\n\n\n\n<p>\u540c\u6837\u7684\u9053\u7406\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f60\u53ea\u8d1f\u8d23\u628a\u89c4\u5219\u51fd\u6570\u4ea4\u7ed9 <code>sort<\/code><\/li>\n\n\n\n<li>\u81f3\u4e8e <code>sort<\/code> \u5185\u90e8\u4ec0\u4e48\u65f6\u5019\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u3001\u8c03\u7528\u591a\u5c11\u6b21\u3001\u6309\u4ec0\u4e48\u987a\u5e8f\u8c03\u7528\uff0c\u8fd9\u4e9b\u90fd\u7531 <code>sort<\/code> \u81ea\u5df1\u5b8c\u6210<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u4f60\u4f1a\u611f\u89c9\uff1a<\/p>\n\n\n\n<p>\u201c\u6211\u6ca1\u4f20\u554a\uff0c\u600e\u4e48 <code>x<\/code> \u5c31\u6709\u503c\u4e86\uff1f\u201d<\/p>\n\n\n\n<p>\u5176\u5b9e\u4e0d\u662f\u6ca1\u4f20\uff0c\u800c\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u4e0d\u662f\u4f60\u76f4\u63a5\u4f20\u7684\uff0c\u662f <code>sort<\/code> \u66ff\u4f60\u4f20\u7684\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u628a\u8fd9\u53e5\u4ee3\u7801\u62c6\u6210\u201c\u9690\u85cf\u7248\u201d\u6765\u770b<\/h2>\n\n\n\n<p>\u4f60\u770b\u5230\u7684\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u4f46\u4f60\u53ef\u4ee5\u628a\u5b83\u8111\u8865\u6210\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u5148\u628a\u51fd\u6570\u4ea4\u7ed9 <code>sort<\/code><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>key_function = lambda x: (-x&#91;1], x&#91;0])\nitems.sort(key=key_function)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a<code>sort<\/code> \u5185\u90e8\u5f00\u59cb\u5de5\u4f5c<\/h3>\n\n\n\n<p>\u5b83\u4f1a\u505a\u7c7b\u4f3c\u8fd9\u6837\u7684\u4e8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>key_function(('a', 2))\nkey_function(('b', 3))\nkey_function(('c', 2))\n<\/code><\/pre>\n\n\n\n<p>\u4e8e\u662f\u5c31\u5206\u522b\u5f97\u5230\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(-2, 'a')\n(-3, 'b')\n(-2, 'c')\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1a\u6309\u8fd9\u4e9b\u7ed3\u679c\u6392\u5e8f<\/h3>\n\n\n\n<p>\u6700\u540e\u5f97\u5230\u6b63\u786e\u987a\u5e8f\u3002<\/p>\n\n\n\n<p>\u8fd9\u6837\u4e00\u5c55\u5f00\uff0c\u4f60\u5c31\u4f1a\u770b\u5f97\u5f88\u6e05\u695a\uff1a<\/p>\n\n\n\n<p><code>x<\/code> \u4e4b\u6240\u4ee5\u6709\u503c\uff0c\u662f\u56e0\u4e3a <code>sort<\/code> \u5728\u5185\u90e8\u8c03\u7528 <code>key_function<\/code> \u65f6\uff0c\u628a\u5217\u8868\u5143\u7d20\u4f20\u8fdb\u53bb\u4e86\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8fd9\u548c <code>for x in items<\/code> \u5176\u5b9e\u5f88\u50cf<\/h2>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u628a\u5b83\u548c\u5faa\u73af\u5bf9\u6bd4\u7740\u7406\u89e3\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>for x in items:\n    print(x)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u4f60\u4e5f\u6ca1\u6709\u624b\u52a8\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x = ('a', 2)\nx = ('b', 3)\nx = ('c', 2)\n<\/code><\/pre>\n\n\n\n<p>\u4f46\u662f\u5faa\u73af\u6267\u884c\u65f6\uff0c<code>x<\/code> \u4f1a\u4f9d\u6b21\u53d8\u6210\u6bcf\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u4e3a\u4ec0\u4e48\uff1f<\/p>\n\n\n\n<p>\u56e0\u4e3a <code>for<\/code> \u8fd9\u5957\u8bed\u6cd5\u673a\u5236\u4f1a\u81ea\u52a8\u4ece <code>items<\/code> \u91cc\u4e00\u4e2a\u4e00\u4e2a\u53d6\u5143\u7d20\uff0c\u8d4b\u7ed9 <code>x<\/code>\u3002<\/p>\n\n\n\n<p>\u540c\u6837\u5730\uff0c\u5728\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>key=lambda x: ...\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u4f60\u4e5f\u6ca1\u6709\u624b\u52a8\u7ed9 <code>x<\/code> \u8d4b\u503c\u3002<\/p>\n\n\n\n<p>\u4f46\u662f <code>sort<\/code> \u4f1a\u81ea\u52a8\u628a\u6bcf\u4e2a\u5143\u7d20\u4f20\u7ed9\u8fd9\u4e2a\u51fd\u6570\uff0c\u4e8e\u662f <code>x<\/code> \u5c31\u4f9d\u6b21\u4ee3\u8868\u6bcf\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u4e24\u79cd\u611f\u89c9\u5f88\u50cf\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5faa\u73af\u91cc<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>for x in items:\n<\/code><\/pre>\n\n\n\n<p>\u662f\u201c\u5faa\u73af\u673a\u5236\u201d\u81ea\u52a8\u7ed9 <code>x<\/code> \u8d4b\u503c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6392\u5e8f\u91cc<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>key=lambda x: ...\n<\/code><\/pre>\n\n\n\n<p>\u662f\u201csort \u673a\u5236\u201d\u81ea\u52a8\u628a\u5143\u7d20\u4f20\u7ed9 <code>x<\/code>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u53c2\u6570\u540d\u4e3a\u4ec0\u4e48\u504f\u504f\u5199 <code>x<\/code><\/h2>\n\n\n\n<p>\u5176\u5b9e\u4e0d\u4e00\u5b9a\u975e\u5f97\u5199 <code>x<\/code>\u3002<\/p>\n\n\n\n<p>\u4f60\u5199\u6210\u522b\u7684\u540d\u5b57\u4e5f\u884c\uff0c\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda item: (-item&#91;1], item&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u6216\u8005\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda pair: (-pair&#91;1], pair&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e9b\u90fd\u53ef\u4ee5\u3002<\/p>\n\n\n\n<p>\u56e0\u4e3a\u53c2\u6570\u540d\u53ea\u662f\u4e00\u4e2a\u201c\u5360\u4f4d\u540d\u5b57\u201d\uff0c\u7528\u6765\u8868\u793a\uff1a<\/p>\n\n\n\n<p>\u201c\u5c06\u6765\u522b\u4eba\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u65f6\uff0c\u4f20\u8fdb\u6765\u7684\u90a3\u4e2a\u4e1c\u897f\uff0c\u6211\u5728\u51fd\u6570\u5185\u90e8\u600e\u4e48\u79f0\u547c\u5b83\u3002\u201d<\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5199 <code>x<\/code> \u53ef\u4ee5<\/li>\n\n\n\n<li>\u5199 <code>item<\/code> \u53ef\u4ee5<\/li>\n\n\n\n<li>\u5199 <code>pair<\/code> \u4e5f\u53ef\u4ee5<\/li>\n<\/ul>\n\n\n\n<p>\u4e4b\u6240\u4ee5\u5f88\u591a\u793a\u4f8b\u7231\u5199 <code>x<\/code>\uff0c\u53ea\u662f\u56e0\u4e3a\u77ed\u3001\u65b9\u4fbf\u3002<\/p>\n\n\n\n<p>\u4f46\u4ece\u5b66\u4e60\u89d2\u5ea6\u6765\u8bf4\uff0c\u521d\u5b66\u8005\u5176\u5b9e\u5199\u6210 <code>item<\/code> \u5f80\u5f80\u66f4\u6e05\u695a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda item: (-item&#91;1], item&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u6837\u4f60\u66f4\u5bb9\u6613\u770b\u61c2\uff1a<\/p>\n\n\n\n<p>\u201c\u54e6\uff0c<code>item<\/code> \u5c31\u662f\u5217\u8868\u91cc\u7684\u4e00\u4e2a\u5143\u7d20\u3002\u201d<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u518d\u770b\u4e00\u4e2a\u4f60\u81ea\u5df1\u80fd\u5b8c\u5168\u63a7\u5236\u7684\u4f8b\u5b50<\/h2>\n\n\n\n<p>\u4e3a\u4e86\u628a\u201c\u8c01\u5728\u4f20\u53c2\u6570\u201d\u8fd9\u4ef6\u4e8b\u5f7b\u5e95\u770b\u6e05\uff0c\u6211\u4eec\u81ea\u5df1\u5199\u4e00\u4e2a\u7b80\u5316\u7248\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def my_sort_like(data, key_func):\n    for item in data:\n        print('\u5f53\u524d\u5143\u7d20:', item)\n        print('key\u7ed3\u679c:', key_func(item))\n<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\u8fd9\u6837\u8c03\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items = &#91;('a', 2), ('b', 3), ('c', 2)]\nmy_sort_like(items, lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u6267\u884c\u8fc7\u7a0b\u53ef\u4ee5\u7406\u89e3\u6210\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b21\u5faa\u73af<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>item = ('a', 2)\nkey_func(item)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\u76f8\u5f53\u4e8e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(lambda x: (-x&#91;1], x&#91;0]))(('a', 2))\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5 <code>x = ('a', 2)<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b21\u5faa\u73af<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>item = ('b', 3)\nkey_func(item)\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5 <code>x = ('b', 3)<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b21\u5faa\u73af<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>item = ('c', 2)\nkey_func(item)\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5 <code>x = ('c', 2)<\/code><\/p>\n\n\n\n<p>\u4f60\u770b\uff0c\u53ea\u8981\u81ea\u5df1\u6a21\u62df\u4e00\u6b21\uff0c\u5c31\u5f88\u6e05\u695a\u4e86\uff1a<\/p>\n\n\n\n<p><strong>\u53c2\u6570\u662f\u8c01\u4f20\u7684\uff0c\u53d6\u51b3\u4e8e\u662f\u8c01\u5728\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u3002<\/strong><\/p>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u91cc\uff0c\u662f <code>my_sort_like<\/code> \u4f20\u7684\u3002<br>\u5728\u771f\u6b63\u7684\u6392\u5e8f\u91cc\uff0c\u662f <code>sort<\/code> \u4f20\u7684\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u539f\u5219<\/h2>\n\n\n\n<p>\u4ee5\u540e\u53ea\u8981\u4f60\u770b\u5230\u8fd9\u79cd\u7ed3\u6784\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u67d0\u4e2a\u51fd\u6570(\u53e6\u4e00\u4e2a\u51fd\u6570)\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u90fd\u8981\u7acb\u523b\u60f3\u5230\uff1a<\/p>\n\n\n\n<p><strong>\u90a3\u4e2a\u201c\u53e6\u4e00\u4e2a\u51fd\u6570\u201d\u5f88\u53ef\u80fd\u4e0d\u662f\u4f60\u9a6c\u4e0a\u81ea\u5df1\u8c03\u7528\uff0c\u800c\u662f\u88ab\u5916\u5c42\u51fd\u6570\u7559\u7740\uff0c\u7b49\u4f1a\u513f\u5185\u90e8\u518d\u8c03\u7528\u3002<\/strong><\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=...)\nmap(...)\nfilter(...)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u7c7b\u5199\u6cd5\u90fd\u6709\u4e00\u4e2a\u5171\u540c\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f60\u63d0\u4f9b\u89c4\u5219<\/li>\n\n\n\n<li>\u7cfb\u7edf\u5185\u90e8\u53bb\u53cd\u590d\u8c03\u7528\u8fd9\u4e2a\u89c4\u5219<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u53c2\u6570\u662f\u201c\u5185\u90e8\u673a\u5236\u201d\u4f20\u8fdb\u53bb\u7684\uff0c\u4e0d\u662f\u4f60\u624b\u52a8\u4e00\u4e2a\u4e2a\u4f20\u7684\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7528\u201c\u8001\u5e08\u70b9\u540d\u201d\u6765\u7406\u89e3\u4e5f\u5f88\u76f4\u89c2<\/h2>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u628a <code>items<\/code> \u60f3\u6210\u4e00\u6392\u5b66\u751f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;('a', 2), ('b', 3), ('c', 2)]\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u628a\u4e00\u4e2a\u89c4\u5219\u4ea4\u7ed9\u8001\u5e08\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda x: (-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\u8001\u5e08\u5f00\u59cb\u70b9\u540d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c\u4e00\u4e2a\u540c\u5b66\u4e0a\u6765\uff0c\u8bb0\u4f5c <code>x<\/code><\/li>\n\n\n\n<li>\u7b2c\u4e8c\u4e2a\u540c\u5b66\u4e0a\u6765\uff0c\u8bb0\u4f5c <code>x<\/code><\/li>\n\n\n\n<li>\u7b2c\u4e09\u4e2a\u540c\u5b66\u4e0a\u6765\uff0c\u8bb0\u4f5c <code>x<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6bcf\u6b21 <code>x<\/code> \u90fd\u662f\u201c\u5f53\u524d\u6b63\u5728\u5904\u7406\u7684\u90a3\u4e00\u4e2a\u201d\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5 <code>x<\/code> \u5e76\u4e0d\u662f\u67d0\u4e2a\u6c38\u8fdc\u4e0d\u53d8\u7684\u4eba\uff0c\u800c\u662f\u4e00\u4e2a\u4e34\u65f6\u79f0\u547c\uff1a<\/p>\n\n\n\n<p><strong>\u8c01\u5f53\u524d\u88ab\u4f20\u8fdb\u6765\uff0c\u8c01\u5c31\u53eb <code>x<\/code>\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56de\u5230\u4f60\u6700\u60f3\u77e5\u9053\u7684\u90a3\u53e5\u8bdd<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48 <code>key=lambda x: ...<\/code> \u91cc\u5199\u7684\u662f <code>x<\/code>\uff0c\u4f46\u6211\u4eec\u4ece\u6765\u6ca1\u6709\u624b\u52a8\u7ed9\u5b83\u4f20\u53c2\u6570\uff1f<\/h3>\n\n\n\n<p>\u56e0\u4e3a\u8fd9\u4e2a <code>lambda<\/code> \u51fd\u6570\u4e0d\u662f\u4f60\u81ea\u5df1\u5728\u5916\u9762\u8c03\u7528\u7684\uff0c\u800c\u662f <code>sort()<\/code> \u5728\u5185\u90e8\u8c03\u7528\u7684\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b83\u5230\u5e95\u662f\u8c01\u4f20\u8fdb\u6765\u7684\uff1f<\/h3>\n\n\n\n<p>\u662f <code>sort()<\/code> \u5728\u6392\u5e8f\u8fc7\u7a0b\u4e2d\uff0c\u628a\u5217\u8868\u91cc\u7684\u6bcf\u4e2a\u5143\u7d20\u4f9d\u6b21\u4f20\u8fdb\u53bb\u7684\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u90a3 <code>x<\/code> \u6bcf\u6b21\u4ee3\u8868\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<p>\u4ee3\u8868\u5f53\u524d\u6b63\u5728\u88ab\u6392\u5e8f\u89c4\u5219\u5904\u7406\u7684\u90a3\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u5728\u8fd9\u9053\u9898\u91cc\uff0c<code>items<\/code> \u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u4e2a\u5143\u7ec4\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(\u5b57\u7b26, \u6b21\u6570)\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5 <code>x<\/code> \u6bcf\u6b21\u5c31\u662f\u5176\u4e2d\u4e00\u4e2a\u8fd9\u6837\u7684\u5143\u7ec4\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u672c\u8282\u5c0f\u7ed3<\/h2>\n\n\n\n<p>\u8fd9\u8282\u6700\u91cd\u8981\u7684\u4e00\u53e5\u8bdd\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u51fd\u6570\u53c2\u6570\u7684\u503c\uff0c\u4e0d\u4e00\u5b9a\u975e\u8981\u4f60\u624b\u52a8\u5199\u5728\u62ec\u53f7\u91cc\uff1b\u8c01\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\uff0c\u8c01\u5c31\u8d1f\u8d23\u7ed9\u53c2\u6570\u8d4b\u503c\u3002<\/strong><\/p>\n\n\n\n<p>\u5728\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u91cc\uff0c<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f60\u8d1f\u8d23\u63d0\u4f9b\u51fd\u6570<\/li>\n\n\n\n<li><code>sort<\/code> \u8d1f\u8d23\u8c03\u7528\u51fd\u6570<\/li>\n\n\n\n<li><code>sort<\/code> \u8c03\u7528\u65f6\u628a <code>items<\/code> \u4e2d\u7684\u5143\u7d20\u4f20\u8fdb\u53bb<\/li>\n\n\n\n<li>\u6240\u4ee5 <code>x<\/code> \u5c31\u81ea\u52a8\u6709\u503c\u4e86<\/li>\n<\/ul>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u628a\u8fd9\u4ef6\u4e8b\u8bb0\u6210\u4e00\u4e2a\u56fa\u5b9a\u601d\u7ef4\uff1a<\/p>\n\n\n\n<p><strong><code>key<\/code> \u540e\u9762\u5199\u7684\u662f\u201c\u89c4\u5219\u51fd\u6570\u201d\uff0c\u800c\u89c4\u5219\u51fd\u6570\u91cc\u7684\u53c2\u6570\uff0c\u6765\u81ea Python \u5185\u90e8\u5728\u6392\u5e8f\u65f6\u4f20\u8fdb\u6765\u7684\u5f53\u524d\u5143\u7d20\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7ec3\u4e60<\/h2>\n\n\n\n<p>\u8fd9\u6b21\u8fd8\u662f\u53ea\u7ed9\u9898\u76ee\u548c\u63d0\u793a\uff0c\u4f60\u5148\u81ea\u5df1\u60f3\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 1<\/h3>\n\n\n\n<p>\u770b\u4e0b\u9762\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>words = &#91;'apple', 'banana', 'kiwi']\nwords.sort(key=lambda s: len(s))\n<\/code><\/pre>\n\n\n\n<p>\u95ee\u9898\uff1a\u8fd9\u91cc\u7684 <code>s<\/code> \u662f\u8c01\u4f20\u8fdb\u53bb\u7684\uff1f<\/p>\n\n\n\n<p>\u63d0\u793a\uff1a\u60f3\u6e05\u695a\u662f\u8c01\u5728\u8c03\u7528 <code>lambda s: len(s)<\/code>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 2<\/h3>\n\n\n\n<p>\u770b\u4e0b\u9762\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>nums = &#91;30, 12, 25]\nnums.sort(key=lambda n: n % 10)\n<\/code><\/pre>\n\n\n\n<p>\u95ee\u9898\uff1a\u8fd9\u91cc <code>n<\/code> \u6bcf\u6b21\u53ef\u80fd\u5206\u522b\u662f\u4ec0\u4e48\uff1f<\/p>\n\n\n\n<p>\u63d0\u793a\uff1a\u5b83\u4f1a\u4f9d\u6b21\u53d8\u6210\u5217\u8868\u91cc\u7684\u6bcf\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 3<\/h3>\n\n\n\n<p>\u628a\u8fd9\u53e5\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u6539\u5199\u6210\u201c\u5148\u628a lambda \u8d4b\u503c\u7ed9\u53d8\u91cf <code>rule<\/code>\uff0c\u518d\u4f20\u7ed9 <code>sort<\/code>\u201d\u7684\u5f62\u5f0f\u3002<\/p>\n\n\n\n<p>\u63d0\u793a\uff1a\u4f60\u4e00\u65e6\u80fd\u5199\u51fa\u8fd9\u4e00\u6b65\uff0c\u5c31\u8bf4\u660e\u4f60\u5df2\u7ecf\u5f00\u59cb\u771f\u6b63\u7406\u89e3\u201c\u51fd\u6570\u662f\u53ef\u4ee5\u5148\u5b58\u8d77\u6765\uff0c\u518d\u4ea4\u7ed9\u522b\u4eba\u8c03\u7528\u201d\u7684\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u8fd9\u53c8\u662f\u4e00\u4e2a\u5173\u952e\u95ee\u9898<\/h2>\n\n\n\n<p>\u4f60\u73b0\u5728\u95ee\u7684\u8fd9\u4e2a\u95ee\u9898\uff0c\u5df2\u7ecf\u975e\u5e38\u63a5\u8fd1\u672c\u8d28\u4e86\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u660e\u660e\u5199\u4e86\u4e00\u4e2a\u53c2\u6570 <code>x<\/code>\uff0c\u4f46\u6211\u4eec\u81ea\u5df1\u4ece\u5934\u5230\u5c3e\u90fd\u6ca1\u6709\u624b\u52a8\u5199\u8fc7\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda(\u67d0\u4e2a\u4e1c\u897f)\n<\/code><\/pre>\n\n\n\n<p>\u90a3\u8fd9\u4e2a <code>x<\/code> \u5230\u5e95\u662f\u8c01\u7ed9\u7684\uff1f<\/p>\n\n\n\n<p>\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u4e0d\u662f\u4f60\u4f20\u7684\uff0c\u662f <code>sort()<\/code> \u5728\u5185\u90e8\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u65f6\u4f20\u8fdb\u53bb\u7684\u3002<\/strong><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c<code>x<\/code> \u7684\u503c\u6765\u81ea <code>sort<\/code> \u6392\u5e8f\u8fc7\u7a0b\u4e2d\uff0c\u4f9d\u6b21\u62ff\u51fa\u6765\u7684\u5217\u8868\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u8fd9\u8282\u6211\u4eec\u5c31\u628a\u8fd9\u4ef6\u4e8b\u5f7b\u5e95\u8bb2\u900f\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5148\u7ed9\u4e00\u53e5\u6700\u76f4\u63a5\u7684\u4eba\u8bdd\u7248<\/h2>\n\n\n\n<p>\u5f53\u4f60\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u5176\u5b9e\u662f\u5728\u5bf9 Python \u8bf4\uff1a<\/p>\n\n\n\n<p>\u201c\u6211\u7ed9\u4f60\u4e00\u4e2a\u89c4\u5219\u51fd\u6570\u3002\u4f60\u5728\u6392\u5e8f <code>items<\/code> \u7684\u65f6\u5019\uff0c\u6bcf\u62ff\u5230\u4e00\u4e2a\u5143\u7d20\uff0c\u5c31\u628a\u8fd9\u4e2a\u5143\u7d20\u4f20\u7ed9\u8fd9\u4e2a\u51fd\u6570\u3002\u51fd\u6570\u53c2\u6570\u540d\u6211\u8fd9\u91cc\u5199\u6210 <code>x<\/code>\u3002\u201d<\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>x<\/code> \u4e0d\u662f\u4f60\u624b\u52a8\u4f20\u7684<\/li>\n\n\n\n<li><code>x<\/code> \u662f <code>sort()<\/code> \u5185\u90e8\u5e2e\u4f60\u4f20\u7684<\/li>\n\n\n\n<li><code>x<\/code> \u6bcf\u6b21\u90fd\u4f1a\u53d8\u6210\u5217\u8868\u4e2d\u7684\u4e00\u4e2a\u5143\u7d20<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5148\u56de\u5fc6\u4e00\u4e0b\uff1a\u51fd\u6570\u53c2\u6570\u4e0d\u4e00\u5b9a\u975e\u8981\u4f60\u4eb2\u624b\u4f20<\/h2>\n\n\n\n<p>\u5f88\u591a\u521d\u5b66\u8005\u8111\u5b50\u91cc\u9ed8\u8ba4\u6709\u4e00\u79cd\u5370\u8c61\uff1a<\/p>\n\n\n\n<p>\u201c\u51fd\u6570\u53c2\u6570\uff0c\u4e00\u5b9a\u8981\u6211\u81ea\u5df1\u5728\u62ec\u53f7\u91cc\u5199\u51fa\u6765\u3002\u201d<\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def add_one(n):\n    return n + 1\n\nprint(add_one(5))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u786e\u5b9e\u662f\u4f60\u624b\u52a8\u4f20\u4e86 <code>5<\/code> \u7ed9 <code>n<\/code>\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u4f60\u4f1a\u5f62\u6210\u4e00\u4e2a\u5370\u8c61\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>n<\/code> \u7684\u503c\u662f\u6211\u5199\u8fdb\u53bb\u7684<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e2a\u5370\u8c61\u6ca1\u9519\uff0c\u4f46\u5b83\u53ea\u662f\u201c\u6700\u5e38\u89c1\u60c5\u51b5\u201d\uff0c\u4e0d\u662f\u552f\u4e00\u60c5\u51b5\u3002<\/p>\n\n\n\n<p>\u56e0\u4e3a\u8fd8\u6709\u53e6\u4e00\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n<p><strong>\u4f60\u628a\u51fd\u6570\u4ea4\u7ed9\u522b\u7684\u51fd\u6570\uff0c\u90a3\u4e2a\u522b\u7684\u51fd\u6570\u4f1a\u66ff\u4f60\u8c03\u7528\u5b83\u3002<\/strong><\/p>\n\n\n\n<p>\u8fd9\u65f6\uff0c\u53c2\u6570\u5c31\u4e0d\u662f\u4f60\u4eb2\u624b\u4f20\uff0c\u800c\u662f\u201c\u5916\u5c42\u51fd\u6570\u201d\u5e2e\u4f60\u4f20\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5148\u770b\u4e00\u4e2a\u6700\u7b80\u5355\u7684\u7c7b\u6bd4<\/h2>\n\n\n\n<p>\u6211\u4eec\u5148\u81ea\u5df1\u5199\u4e00\u4e2a\u51fd\u6570\uff0c\u6a21\u62df\u8fd9\u79cd\u201c\u51fd\u6570\u91cc\u9762\u518d\u8c03\u7528\u51fd\u6570\u201d\u7684\u611f\u89c9\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def use_function(f):\n    print(f(10))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc <code>use_function<\/code> \u63a5\u6536\u4e00\u4e2a\u53c2\u6570 <code>f<\/code>\uff0c\u800c\u4e14\u5b83\u5047\u8bbe <code>f<\/code> \u662f\u4e00\u4e2a\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u7136\u540e\u5b83\u5185\u90e8\u505a\u4e86\u8fd9\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>f(10)\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c<strong>\u662f <code>use_function<\/code> \u5728\u8c03\u7528 <code>f<\/code>\uff0c\u5e76\u4e14\u7ed9\u5b83\u4f20\u4e86\u53c2\u6570 <code>10<\/code>\u3002<\/strong><\/p>\n\n\n\n<p>\u73b0\u5728\u6211\u4eec\u8fd9\u6837\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>use_function(lambda x: x + 1)\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u4f1a\u53d1\u73b0\u8fd9\u91cc\u6211\u4eec\u6ca1\u6709\u624b\u52a8\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(lambda x: x + 1)(10)\n<\/code><\/pre>\n\n\n\n<p>\u4f46\u7a0b\u5e8f\u4f9d\u7136\u80fd\u8fd0\u884c\u3002<\/p>\n\n\n\n<p>\u4e3a\u4ec0\u4e48\uff1f<\/p>\n\n\n\n<p>\u56e0\u4e3a\u8c03\u7528\u8fc7\u7a0b\u5b9e\u9645\u4e0a\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65<\/h3>\n\n\n\n<p>\u4f60\u628a\u8fd9\u4e2a\u51fd\u6570\u4ea4\u7ed9 <code>use_function<\/code>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda x: x + 1\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65<\/h3>\n\n\n\n<p><code>use_function<\/code> \u5185\u90e8\u81ea\u5df1\u8c03\u7528\u5b83\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>f(10)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65<\/h3>\n\n\n\n<p>\u4e8e\u662f\u8fd9\u4e2a <code>10<\/code> \u5c31\u53d8\u6210\u4e86 <code>lambda<\/code> \u91cc\u7684 <code>x<\/code><\/p>\n\n\n\n<p>\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x = 10\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\u7ed3\u679c\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>11\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4f8b\u5b50\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u548c <code>sort(key=...)<\/code> \u7684\u5173\u7cfb\u51e0\u4e4e\u4e00\u6a21\u4e00\u6837\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><code>sort(key=...)<\/code> \u672c\u8d28\u4e0a\u4e5f\u5728\u505a\u540c\u6837\u7684\u4e8b<\/h2>\n\n\n\n<p>\u5f53\u4f60\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u5e76\u4e0d\u662f\u4f60\u5728\u81ea\u5df1\u8c03\u7528\u8fd9\u4e2a lambda\u3002<\/p>\n\n\n\n<p>\u800c\u662f\u4f60\u628a\u8fd9\u4e2a lambda \u51fd\u6570\u4ea4\u7ed9\u4e86 <code>sort<\/code>\u3002<\/p>\n\n\n\n<p>\u7136\u540e <code>sort<\/code> \u5728\u5185\u90e8\u4f1a\u505a\u7c7b\u4f3c\u8fd9\u6837\u7684\u4e8b\u60c5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>key(\u67d0\u4e2a\u5217\u8868\u5143\u7d20)\n<\/code><\/pre>\n\n\n\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u771f\u6b63\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u7684\u662f <code>sort<\/code>\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5 <code>x<\/code> \u7684\u6765\u6e90\u5c31\u662f\uff1a<\/p>\n\n\n\n<p><strong><code>sort<\/code> \u6bcf\u6b21\u62ff\u51fa\u6765\u5904\u7406\u7684\u90a3\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56de\u5230\u539f\u9898\uff0c<code>x<\/code> \u5230\u5e95\u53ef\u80fd\u662f\u8c01<\/h2>\n\n\n\n<p>\u5047\u8bbe\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items = &#91;('a', 2), ('b', 3), ('c', 2)]\n<\/code><\/pre>\n\n\n\n<p>\u90a3\u4e48\u6392\u5e8f\u65f6\uff0c<code>sort<\/code> \u4f1a\u4f9d\u6b21\u5904\u7406\u8fd9\u4e9b\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u4e8e\u662f\u67d0\u4e00\u6b21\u8c03\u7528\u65f6\uff0c\u53ef\u80fd\u76f8\u5f53\u4e8e\u505a\u4e86\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(lambda x: (-x&#91;1], x&#91;0]))(('a', 2))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x = ('a', 2)\n<\/code><\/pre>\n\n\n\n<p>\u518d\u4e0b\u4e00\u6b21\uff0c\u53ef\u80fd\u76f8\u5f53\u4e8e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(lambda x: (-x&#91;1], x&#91;0]))(('b', 3))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x = ('b', 3)\n<\/code><\/pre>\n\n\n\n<p>\u518d\u4e0b\u4e00\u6b21\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(lambda x: (-x&#91;1], x&#91;0]))(('c', 2))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x = ('c', 2)\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u91cc\u7684 <code>x<\/code> \u5e76\u4e0d\u662f\u4e00\u4e2a\u56fa\u5b9a\u503c\uff0c\u800c\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u6392\u5e8f\u8fc7\u7a0b\u4e2d\uff0c\u5f53\u524d\u6b63\u5728\u88ab\u5904\u7406\u7684\u90a3\u4e2a\u5143\u7d20\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u6211\u4eec\u770b\u4e0d\u5230\u8fd9\u4e2a\u201c\u4f20\u53c2\u52a8\u4f5c\u201d<\/h2>\n\n\n\n<p>\u56e0\u4e3a\u8fd9\u4e2a\u52a8\u4f5c\u53d1\u751f\u5728 <code>sort()<\/code> \u7684\u5185\u90e8\u3002<\/p>\n\n\n\n<p>\u8fd9\u5c31\u50cf\u4f60\u7528\u6d17\u8863\u673a\u6d17\u8863\u670d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f60\u53ea\u8d1f\u8d23\u628a\u8863\u670d\u653e\u8fdb\u53bb\u3001\u6309\u6a21\u5f0f<\/li>\n\n\n\n<li>\u81f3\u4e8e\u6d17\u8863\u673a\u5185\u90e8\u4ec0\u4e48\u65f6\u5019\u8fdb\u6c34\u3001\u4ec0\u4e48\u65f6\u5019\u65cb\u8f6c\u3001\u4ec0\u4e48\u65f6\u5019\u7529\u5e72\uff0c\u4f60\u770b\u4e0d\u5230<\/li>\n<\/ul>\n\n\n\n<p>\u540c\u6837\u7684\u9053\u7406\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f60\u53ea\u8d1f\u8d23\u628a\u89c4\u5219\u51fd\u6570\u4ea4\u7ed9 <code>sort<\/code><\/li>\n\n\n\n<li>\u81f3\u4e8e <code>sort<\/code> \u5185\u90e8\u4ec0\u4e48\u65f6\u5019\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u3001\u8c03\u7528\u591a\u5c11\u6b21\u3001\u6309\u4ec0\u4e48\u987a\u5e8f\u8c03\u7528\uff0c\u8fd9\u4e9b\u90fd\u7531 <code>sort<\/code> \u81ea\u5df1\u5b8c\u6210<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u4f60\u4f1a\u611f\u89c9\uff1a<\/p>\n\n\n\n<p>\u201c\u6211\u6ca1\u4f20\u554a\uff0c\u600e\u4e48 <code>x<\/code> \u5c31\u6709\u503c\u4e86\uff1f\u201d<\/p>\n\n\n\n<p>\u5176\u5b9e\u4e0d\u662f\u6ca1\u4f20\uff0c\u800c\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u4e0d\u662f\u4f60\u76f4\u63a5\u4f20\u7684\uff0c\u662f <code>sort<\/code> \u66ff\u4f60\u4f20\u7684\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u628a\u8fd9\u53e5\u4ee3\u7801\u62c6\u6210\u201c\u9690\u85cf\u7248\u201d\u6765\u770b<\/h2>\n\n\n\n<p>\u4f60\u770b\u5230\u7684\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u4f46\u4f60\u53ef\u4ee5\u628a\u5b83\u8111\u8865\u6210\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1a\u5148\u628a\u51fd\u6570\u4ea4\u7ed9 <code>sort<\/code><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>key_function = lambda x: (-x&#91;1], x&#91;0])\nitems.sort(key=key_function)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1a<code>sort<\/code> \u5185\u90e8\u5f00\u59cb\u5de5\u4f5c<\/h3>\n\n\n\n<p>\u5b83\u4f1a\u505a\u7c7b\u4f3c\u8fd9\u6837\u7684\u4e8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>key_function(('a', 2))\nkey_function(('b', 3))\nkey_function(('c', 2))\n<\/code><\/pre>\n\n\n\n<p>\u4e8e\u662f\u5c31\u5206\u522b\u5f97\u5230\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(-2, 'a')\n(-3, 'b')\n(-2, 'c')\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1a\u6309\u8fd9\u4e9b\u7ed3\u679c\u6392\u5e8f<\/h3>\n\n\n\n<p>\u6700\u540e\u5f97\u5230\u6b63\u786e\u987a\u5e8f\u3002<\/p>\n\n\n\n<p>\u8fd9\u6837\u4e00\u5c55\u5f00\uff0c\u4f60\u5c31\u4f1a\u770b\u5f97\u5f88\u6e05\u695a\uff1a<\/p>\n\n\n\n<p><code>x<\/code> \u4e4b\u6240\u4ee5\u6709\u503c\uff0c\u662f\u56e0\u4e3a <code>sort<\/code> \u5728\u5185\u90e8\u8c03\u7528 <code>key_function<\/code> \u65f6\uff0c\u628a\u5217\u8868\u5143\u7d20\u4f20\u8fdb\u53bb\u4e86\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8fd9\u548c <code>for x in items<\/code> \u5176\u5b9e\u5f88\u50cf<\/h2>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u628a\u5b83\u548c\u5faa\u73af\u5bf9\u6bd4\u7740\u7406\u89e3\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>for x in items:\n    print(x)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u4f60\u4e5f\u6ca1\u6709\u624b\u52a8\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>x = ('a', 2)\nx = ('b', 3)\nx = ('c', 2)\n<\/code><\/pre>\n\n\n\n<p>\u4f46\u662f\u5faa\u73af\u6267\u884c\u65f6\uff0c<code>x<\/code> \u4f1a\u4f9d\u6b21\u53d8\u6210\u6bcf\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u4e3a\u4ec0\u4e48\uff1f<\/p>\n\n\n\n<p>\u56e0\u4e3a <code>for<\/code> \u8fd9\u5957\u8bed\u6cd5\u673a\u5236\u4f1a\u81ea\u52a8\u4ece <code>items<\/code> \u91cc\u4e00\u4e2a\u4e00\u4e2a\u53d6\u5143\u7d20\uff0c\u8d4b\u7ed9 <code>x<\/code>\u3002<\/p>\n\n\n\n<p>\u540c\u6837\u5730\uff0c\u5728\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>key=lambda x: ...\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u4f60\u4e5f\u6ca1\u6709\u624b\u52a8\u7ed9 <code>x<\/code> \u8d4b\u503c\u3002<\/p>\n\n\n\n<p>\u4f46\u662f <code>sort<\/code> \u4f1a\u81ea\u52a8\u628a\u6bcf\u4e2a\u5143\u7d20\u4f20\u7ed9\u8fd9\u4e2a\u51fd\u6570\uff0c\u4e8e\u662f <code>x<\/code> \u5c31\u4f9d\u6b21\u4ee3\u8868\u6bcf\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u8fd9\u4e24\u79cd\u611f\u89c9\u5f88\u50cf\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5faa\u73af\u91cc<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>for x in items:\n<\/code><\/pre>\n\n\n\n<p>\u662f\u201c\u5faa\u73af\u673a\u5236\u201d\u81ea\u52a8\u7ed9 <code>x<\/code> \u8d4b\u503c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6392\u5e8f\u91cc<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>key=lambda x: ...\n<\/code><\/pre>\n\n\n\n<p>\u662f\u201csort \u673a\u5236\u201d\u81ea\u52a8\u628a\u5143\u7d20\u4f20\u7ed9 <code>x<\/code>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u53c2\u6570\u540d\u4e3a\u4ec0\u4e48\u504f\u504f\u5199 <code>x<\/code><\/h2>\n\n\n\n<p>\u5176\u5b9e\u4e0d\u4e00\u5b9a\u975e\u5f97\u5199 <code>x<\/code>\u3002<\/p>\n\n\n\n<p>\u4f60\u5199\u6210\u522b\u7684\u540d\u5b57\u4e5f\u884c\uff0c\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda item: (-item&#91;1], item&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u6216\u8005\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda pair: (-pair&#91;1], pair&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e9b\u90fd\u53ef\u4ee5\u3002<\/p>\n\n\n\n<p>\u56e0\u4e3a\u53c2\u6570\u540d\u53ea\u662f\u4e00\u4e2a\u201c\u5360\u4f4d\u540d\u5b57\u201d\uff0c\u7528\u6765\u8868\u793a\uff1a<\/p>\n\n\n\n<p>\u201c\u5c06\u6765\u522b\u4eba\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u65f6\uff0c\u4f20\u8fdb\u6765\u7684\u90a3\u4e2a\u4e1c\u897f\uff0c\u6211\u5728\u51fd\u6570\u5185\u90e8\u600e\u4e48\u79f0\u547c\u5b83\u3002\u201d<\/p>\n\n\n\n<p>\u6240\u4ee5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5199 <code>x<\/code> \u53ef\u4ee5<\/li>\n\n\n\n<li>\u5199 <code>item<\/code> \u53ef\u4ee5<\/li>\n\n\n\n<li>\u5199 <code>pair<\/code> \u4e5f\u53ef\u4ee5<\/li>\n<\/ul>\n\n\n\n<p>\u4e4b\u6240\u4ee5\u5f88\u591a\u793a\u4f8b\u7231\u5199 <code>x<\/code>\uff0c\u53ea\u662f\u56e0\u4e3a\u77ed\u3001\u65b9\u4fbf\u3002<\/p>\n\n\n\n<p>\u4f46\u4ece\u5b66\u4e60\u89d2\u5ea6\u6765\u8bf4\uff0c\u521d\u5b66\u8005\u5176\u5b9e\u5199\u6210 <code>item<\/code> \u5f80\u5f80\u66f4\u6e05\u695a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda item: (-item&#91;1], item&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u6837\u4f60\u66f4\u5bb9\u6613\u770b\u61c2\uff1a<\/p>\n\n\n\n<p>\u201c\u54e6\uff0c<code>item<\/code> \u5c31\u662f\u5217\u8868\u91cc\u7684\u4e00\u4e2a\u5143\u7d20\u3002\u201d<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u518d\u770b\u4e00\u4e2a\u4f60\u81ea\u5df1\u80fd\u5b8c\u5168\u63a7\u5236\u7684\u4f8b\u5b50<\/h2>\n\n\n\n<p>\u4e3a\u4e86\u628a\u201c\u8c01\u5728\u4f20\u53c2\u6570\u201d\u8fd9\u4ef6\u4e8b\u5f7b\u5e95\u770b\u6e05\uff0c\u6211\u4eec\u81ea\u5df1\u5199\u4e00\u4e2a\u7b80\u5316\u7248\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def my_sort_like(data, key_func):\n    for item in data:\n        print('\u5f53\u524d\u5143\u7d20:', item)\n        print('key\u7ed3\u679c:', key_func(item))\n<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\u8fd9\u6837\u8c03\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items = &#91;('a', 2), ('b', 3), ('c', 2)]\nmy_sort_like(items, lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u6267\u884c\u8fc7\u7a0b\u53ef\u4ee5\u7406\u89e3\u6210\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u6b21\u5faa\u73af<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>item = ('a', 2)\nkey_func(item)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\u76f8\u5f53\u4e8e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(lambda x: (-x&#91;1], x&#91;0]))(('a', 2))\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5 <code>x = ('a', 2)<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b21\u5faa\u73af<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>item = ('b', 3)\nkey_func(item)\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5 <code>x = ('b', 3)<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e09\u6b21\u5faa\u73af<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>item = ('c', 2)\nkey_func(item)\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5 <code>x = ('c', 2)<\/code><\/p>\n\n\n\n<p>\u4f60\u770b\uff0c\u53ea\u8981\u81ea\u5df1\u6a21\u62df\u4e00\u6b21\uff0c\u5c31\u5f88\u6e05\u695a\u4e86\uff1a<\/p>\n\n\n\n<p><strong>\u53c2\u6570\u662f\u8c01\u4f20\u7684\uff0c\u53d6\u51b3\u4e8e\u662f\u8c01\u5728\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u3002<\/strong><\/p>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u91cc\uff0c\u662f <code>my_sort_like<\/code> \u4f20\u7684\u3002<br>\u5728\u771f\u6b63\u7684\u6392\u5e8f\u91cc\uff0c\u662f <code>sort<\/code> \u4f20\u7684\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u539f\u5219<\/h2>\n\n\n\n<p>\u4ee5\u540e\u53ea\u8981\u4f60\u770b\u5230\u8fd9\u79cd\u7ed3\u6784\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u67d0\u4e2a\u51fd\u6570(\u53e6\u4e00\u4e2a\u51fd\u6570)\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u90fd\u8981\u7acb\u523b\u60f3\u5230\uff1a<\/p>\n\n\n\n<p><strong>\u90a3\u4e2a\u201c\u53e6\u4e00\u4e2a\u51fd\u6570\u201d\u5f88\u53ef\u80fd\u4e0d\u662f\u4f60\u9a6c\u4e0a\u81ea\u5df1\u8c03\u7528\uff0c\u800c\u662f\u88ab\u5916\u5c42\u51fd\u6570\u7559\u7740\uff0c\u7b49\u4f1a\u513f\u5185\u90e8\u518d\u8c03\u7528\u3002<\/strong><\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=...)\nmap(...)\nfilter(...)\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u7c7b\u5199\u6cd5\u90fd\u6709\u4e00\u4e2a\u5171\u540c\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f60\u63d0\u4f9b\u89c4\u5219<\/li>\n\n\n\n<li>\u7cfb\u7edf\u5185\u90e8\u53bb\u53cd\u590d\u8c03\u7528\u8fd9\u4e2a\u89c4\u5219<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u53c2\u6570\u662f\u201c\u5185\u90e8\u673a\u5236\u201d\u4f20\u8fdb\u53bb\u7684\uff0c\u4e0d\u662f\u4f60\u624b\u52a8\u4e00\u4e2a\u4e2a\u4f20\u7684\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7528\u201c\u8001\u5e08\u70b9\u540d\u201d\u6765\u7406\u89e3\u4e5f\u5f88\u76f4\u89c2<\/h2>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u628a <code>items<\/code> \u60f3\u6210\u4e00\u6392\u5b66\u751f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;('a', 2), ('b', 3), ('c', 2)]\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u628a\u4e00\u4e2a\u89c4\u5219\u4ea4\u7ed9\u8001\u5e08\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lambda x: (-x&#91;1], x&#91;0])\n<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\u8001\u5e08\u5f00\u59cb\u70b9\u540d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c\u4e00\u4e2a\u540c\u5b66\u4e0a\u6765\uff0c\u8bb0\u4f5c <code>x<\/code><\/li>\n\n\n\n<li>\u7b2c\u4e8c\u4e2a\u540c\u5b66\u4e0a\u6765\uff0c\u8bb0\u4f5c <code>x<\/code><\/li>\n\n\n\n<li>\u7b2c\u4e09\u4e2a\u540c\u5b66\u4e0a\u6765\uff0c\u8bb0\u4f5c <code>x<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6bcf\u6b21 <code>x<\/code> \u90fd\u662f\u201c\u5f53\u524d\u6b63\u5728\u5904\u7406\u7684\u90a3\u4e00\u4e2a\u201d\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5 <code>x<\/code> \u5e76\u4e0d\u662f\u67d0\u4e2a\u6c38\u8fdc\u4e0d\u53d8\u7684\u4eba\uff0c\u800c\u662f\u4e00\u4e2a\u4e34\u65f6\u79f0\u547c\uff1a<\/p>\n\n\n\n<p><strong>\u8c01\u5f53\u524d\u88ab\u4f20\u8fdb\u6765\uff0c\u8c01\u5c31\u53eb <code>x<\/code>\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56de\u5230\u4f60\u6700\u60f3\u77e5\u9053\u7684\u90a3\u53e5\u8bdd<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48 <code>key=lambda x: ...<\/code> \u91cc\u5199\u7684\u662f <code>x<\/code>\uff0c\u4f46\u6211\u4eec\u4ece\u6765\u6ca1\u6709\u624b\u52a8\u7ed9\u5b83\u4f20\u53c2\u6570\uff1f<\/h3>\n\n\n\n<p>\u56e0\u4e3a\u8fd9\u4e2a <code>lambda<\/code> \u51fd\u6570\u4e0d\u662f\u4f60\u81ea\u5df1\u5728\u5916\u9762\u8c03\u7528\u7684\uff0c\u800c\u662f <code>sort()<\/code> \u5728\u5185\u90e8\u8c03\u7528\u7684\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b83\u5230\u5e95\u662f\u8c01\u4f20\u8fdb\u6765\u7684\uff1f<\/h3>\n\n\n\n<p>\u662f <code>sort()<\/code> \u5728\u6392\u5e8f\u8fc7\u7a0b\u4e2d\uff0c\u628a\u5217\u8868\u91cc\u7684\u6bcf\u4e2a\u5143\u7d20\u4f9d\u6b21\u4f20\u8fdb\u53bb\u7684\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u90a3 <code>x<\/code> \u6bcf\u6b21\u4ee3\u8868\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<p>\u4ee3\u8868\u5f53\u524d\u6b63\u5728\u88ab\u6392\u5e8f\u89c4\u5219\u5904\u7406\u7684\u90a3\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u5728\u8fd9\u9053\u9898\u91cc\uff0c<code>items<\/code> \u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u4e2a\u5143\u7ec4\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(\u5b57\u7b26, \u6b21\u6570)\n<\/code><\/pre>\n\n\n\n<p>\u6240\u4ee5 <code>x<\/code> \u6bcf\u6b21\u5c31\u662f\u5176\u4e2d\u4e00\u4e2a\u8fd9\u6837\u7684\u5143\u7ec4\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u672c\u8282\u5c0f\u7ed3<\/h2>\n\n\n\n<p>\u8fd9\u8282\u6700\u91cd\u8981\u7684\u4e00\u53e5\u8bdd\u662f\uff1a<\/p>\n\n\n\n<p><strong>\u51fd\u6570\u53c2\u6570\u7684\u503c\uff0c\u4e0d\u4e00\u5b9a\u975e\u8981\u4f60\u624b\u52a8\u5199\u5728\u62ec\u53f7\u91cc\uff1b\u8c01\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\uff0c\u8c01\u5c31\u8d1f\u8d23\u7ed9\u53c2\u6570\u8d4b\u503c\u3002<\/strong><\/p>\n\n\n\n<p>\u5728\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u91cc\uff0c<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f60\u8d1f\u8d23\u63d0\u4f9b\u51fd\u6570<\/li>\n\n\n\n<li><code>sort<\/code> \u8d1f\u8d23\u8c03\u7528\u51fd\u6570<\/li>\n\n\n\n<li><code>sort<\/code> \u8c03\u7528\u65f6\u628a <code>items<\/code> \u4e2d\u7684\u5143\u7d20\u4f20\u8fdb\u53bb<\/li>\n\n\n\n<li>\u6240\u4ee5 <code>x<\/code> \u5c31\u81ea\u52a8\u6709\u503c\u4e86<\/li>\n<\/ul>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u628a\u8fd9\u4ef6\u4e8b\u8bb0\u6210\u4e00\u4e2a\u56fa\u5b9a\u601d\u7ef4\uff1a<\/p>\n\n\n\n<p><strong><code>key<\/code> \u540e\u9762\u5199\u7684\u662f\u201c\u89c4\u5219\u51fd\u6570\u201d\uff0c\u800c\u89c4\u5219\u51fd\u6570\u91cc\u7684\u53c2\u6570\uff0c\u6765\u81ea Python \u5185\u90e8\u5728\u6392\u5e8f\u65f6\u4f20\u8fdb\u6765\u7684\u5f53\u524d\u5143\u7d20\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7ec3\u4e60<\/h2>\n\n\n\n<p>\u8fd9\u6b21\u8fd8\u662f\u53ea\u7ed9\u9898\u76ee\u548c\u63d0\u793a\uff0c\u4f60\u5148\u81ea\u5df1\u60f3\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 1<\/h3>\n\n\n\n<p>\u770b\u4e0b\u9762\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>words = &#91;'apple', 'banana', 'kiwi']\nwords.sort(key=lambda s: len(s))\n<\/code><\/pre>\n\n\n\n<p>\u95ee\u9898\uff1a\u8fd9\u91cc\u7684 <code>s<\/code> \u662f\u8c01\u4f20\u8fdb\u53bb\u7684\uff1f<\/p>\n\n\n\n<p>\u63d0\u793a\uff1a\u60f3\u6e05\u695a\u662f\u8c01\u5728\u8c03\u7528 <code>lambda s: len(s)<\/code>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 2<\/h3>\n\n\n\n<p>\u770b\u4e0b\u9762\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>nums = &#91;30, 12, 25]\nnums.sort(key=lambda n: n % 10)\n<\/code><\/pre>\n\n\n\n<p>\u95ee\u9898\uff1a\u8fd9\u91cc <code>n<\/code> \u6bcf\u6b21\u53ef\u80fd\u5206\u522b\u662f\u4ec0\u4e48\uff1f<\/p>\n\n\n\n<p>\u63d0\u793a\uff1a\u5b83\u4f1a\u4f9d\u6b21\u53d8\u6210\u5217\u8868\u91cc\u7684\u6bcf\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ec3\u4e60 3<\/h3>\n\n\n\n<p>\u628a\u8fd9\u53e5\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>items.sort(key=lambda x: (-x&#91;1], x&#91;0]))\n<\/code><\/pre>\n\n\n\n<p>\u6539\u5199\u6210\u201c\u5148\u628a lambda \u8d4b\u503c\u7ed9\u53d8\u91cf <code>rule<\/code>\uff0c\u518d\u4f20\u7ed9 <code>sort<\/code>\u201d\u7684\u5f62\u5f0f\u3002<\/p>\n\n\n\n<p>\u63d0\u793a\uff1a\u4f60\u4e00\u65e6\u80fd\u5199\u51fa\u8fd9\u4e00\u6b65\uff0c\u5c31\u8bf4\u660e\u4f60\u5df2\u7ecf\u5f00\u59cb\u771f\u6b63\u7406\u89e3\u201c\u51fd\u6570\u662f\u53ef\u4ee5\u5148\u5b58\u8d77\u6765\uff0c\u518d\u4ea4\u7ed9\u522b\u4eba\u8c03\u7528\u201d\u7684\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9898\u76ee\u8003\u70b9 \u8fd9\u9053\u9898\u4e3b\u8981\u8003\u8fd9\u51e0\u4e2a\u77e5\u8bc6\u70b9\uff1a \u8fd9\u9898\u7684\u6838\u5fc3\u5176\u5b9e\u5c31\u4e00\u53e5\u8bdd\uff1a \u5148\u7edf\u8ba1\u6bcf\u4e2a\u5b57\u7b26\u51fa\u73b0\u4e86\u51e0\u6b21\uff0c\u518d\u6309\u7167\u201c\u6b21\u6570\u964d\u5e8f\u3001\u5b57 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[],"class_list":["post-2135","post","type-post","status-publish","format-standard","hentry","category-text"],"_links":{"self":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/2135","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=2135"}],"version-history":[{"count":1,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/2135\/revisions"}],"predecessor-version":[{"id":2137,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/2135\/revisions\/2137"}],"wp:attachment":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=2135"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=2135"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=2135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}