{"id":2186,"date":"2026-04-25T09:40:01","date_gmt":"2026-04-25T01:40:01","guid":{"rendered":"http:\/\/www.preluna.xyz\/?p=2186"},"modified":"2026-04-25T09:40:02","modified_gmt":"2026-04-25T01:40:02","slug":"current_part-stringii-sub_len","status":"publish","type":"post","link":"http:\/\/www.preluna.xyz\/index.php\/2026\/04\/25\/current_part-stringii-sub_len\/preluna\/text\/","title":{"rendered":"current_part = string[i:i + sub_len]"},"content":{"rendered":"\n
\"\"<\/div><\/figure>\n\n\n\n

\u9898\u76ee\u8003\u70b9<\/h2>\n\n\n\n

\u8fd9\u9053\u9898\u4e3b\u8981\u8003\uff1a<\/p>\n\n\n\n

    \n
  1. \u5b57\u7b26\u4e32\u904d\u5386<\/li>\n\n\n\n
  2. len()<\/code> \u83b7\u53d6\u5b57\u7b26\u4e32\u957f\u5ea6<\/li>\n\n\n\n
  3. for<\/code> \u5faa\u73af\u548c range()<\/code><\/li>\n\n\n\n
  4. \u5b57\u7b26\u4e32\u5207\u7247<\/li>\n\n\n\n
  5. \u6761\u4ef6\u5224\u65ad if<\/code><\/li>\n\n\n\n
  6. \u8ba1\u6570\u5668\u53d8\u91cf count<\/code><\/li>\n<\/ol>\n\n\n\n

    \u8fd9\u9898\u7684\u6838\u5fc3\u4e0d\u662f\u7b80\u5355\u4f7f\u7528 string.count(sub_string)<\/code>\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u9898\u76ee\u8981\u6c42\u4ece\u5de6\u5230\u53f3\u9010\u4e2a\u4f4d\u7f6e\u68c0\u67e5\uff0c\u901a\u5e38\u8981\u5141\u8bb8\u91cd\u53e0\u5339\u914d\u3002<\/p>\n\n\n\n

    \u4f8b\u5982\uff1a<\/p>\n\n\n\n

    ABCDCDC\nCDC\n<\/code><\/pre>\n\n\n\n
    CDC<\/code> \u51fa\u73b0\u4e86\u4e24\u6b21\uff1a<\/p>\n\n\n\n
    ABCDCDC\n  CDC\n    CDC\n<\/code><\/pre>\n\n\n\n
    \u6240\u4ee5\u7b54\u6848\u662f 2<\/code>\u3002<\/p>\n\n\n\n
    \n\n\n\n
    \u5ba1\u9898<\/h2>\n\n\n\n
    \u9898\u76ee\u8f93\u5165\u4e24\u884c\uff1a<\/p>\n\n\n\n
    \u7b2c\u4e00\u884c\u662f\u539f\u5b57\u7b26\u4e32\uff1a<\/p>\n\n\n\n
    ABCDCDC\n<\/code><\/pre>\n\n\n\n
    \u7b2c\u4e8c\u884c\u662f\u8981\u67e5\u627e\u7684\u5b50\u5b57\u7b26\u4e32\uff1a<\/p>\n\n\n\n
    CDC\n<\/code><\/pre>\n\n\n\n
    \u9898\u76ee\u8981\u6c42\u8f93\u51fa\uff1a\u5b50\u5b57\u7b26\u4e32\u5728\u539f\u5b57\u7b26\u4e32\u4e2d\u51fa\u73b0\u7684\u6b21\u6570\u3002<\/p>\n\n\n\n
    \u9700\u8981\u6ce8\u610f\u4e24\u4e2a\u70b9\u3002<\/p>\n\n\n\n
    \u7b2c\u4e00\uff0c\u5927\u5c0f\u5199\u654f\u611f\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n
    abc\nABC\n<\/code><\/pre>\n\n\n\n
    \u8fd9\u4e24\u4e2a\u4e0d\u4e00\u6837\u3002<\/p>\n\n\n\n
    \u7b2c\u4e8c\uff0c\u8981\u4ece\u5de6\u5230\u53f3\u68c0\u67e5\u6bcf\u4e00\u4e2a\u53ef\u80fd\u7684\u4f4d\u7f6e\uff0c\u800c\u4e0d\u662f\u53ea\u627e\u4e0d\u91cd\u53e0\u7684\u90e8\u5206\u3002<\/p>\n\n\n\n
    \n\n\n\n
    \u601d\u8def\u63d0\u793a<\/h2>\n\n\n\n
    \u4f60\u53ef\u4ee5\u628a\u8fd9\u9053\u9898\u60f3\u6210\u201c\u62ff\u4e00\u4e2a\u5c0f\u7a97\u53e3\u5728\u5927\u5b57\u7b26\u4e32\u4e0a\u4ece\u5de6\u5f80\u53f3\u6ed1\u52a8\u201d\u3002<\/p>\n\n\n\n
    \u5047\u8bbe\uff1a<\/p>\n\n\n\n
    string = \"ABCDCDC\"\nsub_string = \"CDC\"\n<\/code><\/pre>\n\n\n\n
    sub_string<\/code> \u7684\u957f\u5ea6\u662f 3<\/code>\uff0c\u6240\u4ee5\u6211\u4eec\u6bcf\u6b21\u90fd\u4ece\u539f\u5b57\u7b26\u4e32\u91cc\u622a\u53d6\u957f\u5ea6\u4e3a 3<\/code> \u7684\u4e00\u6bb5\uff0c\u770b\u770b\u5b83\u662f\u4e0d\u662f \"CDC\"<\/code>\u3002<\/p>\n\n\n\n
    \u4ece\u5de6\u5230\u53f3\u68c0\u67e5\uff1a<\/p>\n\n\n\n
    i = 0  \u53d6 string[0:3]  \u5f97\u5230 \"ABC\"\ni = 1  \u53d6 string[1:4]  \u5f97\u5230 \"BCD\"\ni = 2  \u53d6 string[2:5]  \u5f97\u5230 \"CDC\"  \u5339\u914d\uff0ccount + 1\ni = 3  \u53d6 string[3:6]  \u5f97\u5230 \"DCD\"\ni = 4  \u53d6 string[4:7]  \u5f97\u5230 \"CDC\"  \u5339\u914d\uff0ccount + 1\n<\/code><\/pre>\n\n\n\n
    \u6700\u540e count = 2<\/code>\u3002<\/p>\n\n\n\n
    \n\n\n\n
    \u5b8c\u6574\u8bbe\u8ba1\u601d\u8def<\/h2>\n\n\n\n
    \u7b2c\u4e00\u6b65\uff1a\u5148\u62ff\u5230\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6<\/h3>\n\n\n\n
    \u6211\u4eec\u9700\u8981\u77e5\u9053\uff1a<\/p>\n\n\n\n
    len(string)\nlen(sub_string)\n<\/code><\/pre>\n\n\n\n
    \u4f8b\u5982\uff1a<\/p>\n\n\n\n
    len(\"ABCDCDC\") = 7\nlen(\"CDC\") = 3\n<\/code><\/pre>\n\n\n\n
    \u7b2c\u4e8c\u6b65\uff1a\u786e\u5b9a\u5faa\u73af\u8303\u56f4<\/h3>\n\n\n\n
    \u56e0\u4e3a\u6bcf\u6b21\u8981\u53d6\u957f\u5ea6\u4e3a 3<\/code> \u7684\u5c0f\u7247\u6bb5\uff0c\u6240\u4ee5\u6700\u540e\u4e00\u4e2a\u8d77\u70b9\u4e0d\u80fd\u8d85\u8fc7 4<\/code>\u3002<\/p>\n\n\n\n
    \u5982\u679c\u4ece i = 5<\/code> \u5f00\u59cb\u53d6\uff1a<\/p>\n\n\n\n
    string[5:8]\n<\/code><\/pre>\n\n\n\n
    \u5c31\u4e0d\u591f 3 \u4e2a\u5b57\u7b26\u4e86\u3002<\/p>\n\n\n\n
    \u6240\u4ee5\u5faa\u73af\u8303\u56f4\u5e94\u8be5\u662f\uff1a<\/p>\n\n\n\n
    range(0, len(string) - len(sub_string) + 1)\n<\/code><\/pre>\n\n\n\n
    \u4e3a\u4ec0\u4e48\u8981 + 1<\/code>\uff1f<\/p>\n\n\n\n
    \u56e0\u4e3a range()<\/code> \u7684\u53f3\u8fb9\u754c\u53d6\u4e0d\u5230\u3002<\/p>\n\n\n\n
    \u4f8b\u5982\uff1a<\/p>\n\n\n\n
    range(0, 5)\n<\/code><\/pre>\n\n\n\n
    \u5b9e\u9645\u5f97\u5230\u7684\u662f\uff1a<\/p>\n\n\n\n
    0, 1, 2, 3, 4\n<\/code><\/pre>\n\n\n\n
    \u5bf9\u4e8e\u6837\u4f8b\uff1a<\/p>\n\n\n\n
    len(string) = 7\nlen(sub_string) = 3\n<\/code><\/pre>\n\n\n\n
    \u6240\u4ee5\uff1a<\/p>\n\n\n\n
    len(string) - len(sub_string) + 1\n= 7 - 3 + 1\n= 5\n<\/code><\/pre>\n\n\n\n
    \u5faa\u73af\u5c31\u662f\uff1a<\/p>\n\n\n\n
    range(0, 5)\n<\/code><\/pre>\n\n\n\n
    \u5b9e\u9645\u68c0\u67e5\u7684\u4f4d\u7f6e\u662f\uff1a<\/p>\n\n\n\n
    0, 1, 2, 3, 4\n<\/code><\/pre>\n\n\n\n
    \u521a\u597d\u591f\u7528\u3002<\/p>\n\n\n\n
    \u7b2c\u4e09\u6b65\uff1a\u6bcf\u6b21\u622a\u53d6\u4e00\u6bb5\u5b57\u7b26\u4e32<\/h3>\n\n\n\n
    \u7528\u5207\u7247\uff1a<\/p>\n\n\n\n
    string[i : i + len(sub_string)]\n<\/code><\/pre>\n\n\n\n
    \u5982\u679c\u8fd9\u6bb5\u7b49\u4e8e sub_string<\/code>\uff0c\u8bf4\u660e\u627e\u5230\u4e00\u6b21\u3002<\/p>\n\n\n\n
    \u7b2c\u56db\u6b65\uff1a\u7528\u8ba1\u6570\u5668\u8bb0\u5f55\u6b21\u6570<\/h3>\n\n\n\n
    \u4e00\u5f00\u59cb\uff1a<\/p>\n\n\n\n
    count = 0\n<\/code><\/pre>\n\n\n\n
    \u6bcf\u627e\u5230\u4e00\u6b21\uff1a<\/p>\n\n\n\n
    count += 1\n<\/code><\/pre>\n\n\n\n
    \u6700\u540e\u8fd4\u56de count<\/code>\u3002<\/p>\n\n\n\n
    \n\n\n\n
    \u4ee3\u7801\u5b9e\u73b0<\/h2>\n\n\n\n
    \u6309\u7167 HackerRank \u8fd9\u7c7b\u9898\u76ee\u7684\u6a21\u677f\uff0c\u53ef\u4ee5\u8fd9\u6837\u5199\uff1a<\/p>\n\n\n\n
    def count_substring(string, sub_string):\n    count = 0\n    sub_len = len(sub_string)\n\n    for i in range(0, len(string) - sub_len + 1):\n        current_part = string[i:i + sub_len]\n\n        if current_part == sub_string:\n            count += 1\n\n    return count\n\n\nif __name__ == '__main__':\n    string = input().strip()\n    sub_string = input().strip()\n\n    count = count_substring(string, sub_string)\n    print(count)\n<\/code><\/pre>\n\n\n\n
    \u8fd9\u91cc\u7684\u6a21\u677f\uff1a<\/p>\n\n\n\n
    if __name__ == '__main__':\n<\/code><\/pre>\n\n\n\n
    \u53ef\u4ee5\u5148\u7406\u89e3\u6210\uff1a\u7a0b\u5e8f\u4ece\u8fd9\u91cc\u5f00\u59cb\u6b63\u5f0f\u8bfb\u53d6\u8f93\u5165\u5e76\u6267\u884c\u3002<\/p>\n\n\n\n
    \u8fd9\u4e00\u6bb5\uff1a<\/p>\n\n\n\n
    string = input().strip()\nsub_string = input().strip()\n<\/code><\/pre>\n\n\n\n
    \u610f\u601d\u662f\u8bfb\u53d6\u4e24\u884c\u8f93\u5165\uff0c\u5e76\u53bb\u6389\u9996\u5c3e\u7a7a\u767d\u3002<\/p>\n\n\n\n
    \n\n\n\n
    \u8fd0\u884c\u6f14\u793a<\/h2>\n\n\n\n
    \u8f93\u5165\uff1a<\/p>\n\n\n\n
    ABCDCDC\nCDC\n<\/code><\/pre>\n\n\n\n
    \u7a0b\u5e8f\u4e2d\uff1a<\/p>\n\n\n\n
    string = \"ABCDCDC\"\nsub_string = \"CDC\"\nsub_len = 3\ncount = 0\n<\/code><\/pre>\n\n\n\n
    \u5faa\u73af\u8fc7\u7a0b\uff1a<\/p>\n\n\n\n
    i<\/th>\u622a\u53d6\u5185\u5bb9<\/th>\u662f\u5426\u7b49\u4e8e CDC<\/th>count<\/th><\/tr><\/thead>
    0<\/td>ABC<\/td>\u5426<\/td>0<\/td><\/tr>
    1<\/td>BCD<\/td>\u5426<\/td>0<\/td><\/tr>
    2<\/td>CDC<\/td>\u662f<\/td>1<\/td><\/tr>
    3<\/td>DCD<\/td>\u5426<\/td>1<\/td><\/tr>
    4<\/td>CDC<\/td>\u662f<\/td>2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \u6700\u7ec8\u8f93\u51fa\uff1a<\/p>\n\n\n\n
    2\n<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    \u65b9\u6cd5\u603b\u7ed3<\/h2>\n\n\n\n
    \u8fd9\u4e00\u7c7b\u9898\u4ee5\u540e\u53ef\u4ee5\u8fd9\u6837\u60f3\uff1a<\/p>\n\n\n\n
    \u770b\u5230\u201c\u7edf\u8ba1\u5b50\u5b57\u7b26\u4e32\u51fa\u73b0\u6b21\u6570\u201d\uff0c\u4e0d\u8981\u6025\u7740\u7528\u73b0\u6210\u51fd\u6570\u3002\u5148\u95ee\u81ea\u5df1\uff1a<\/p>\n\n\n\n
      \n
    1. \u5b50\u5b57\u7b26\u4e32\u80fd\u4e0d\u80fd\u91cd\u53e0\uff1f<\/li>\n\n\n\n
    2. \u662f\u5426\u5927\u5c0f\u5199\u654f\u611f\uff1f<\/li>\n\n\n\n
    3. \u662f\u5426\u8981\u6c42\u4ece\u5de6\u5230\u53f3\u9010\u4e2a\u4f4d\u7f6e\u68c0\u67e5\uff1f<\/li>\n\n\n\n
    4. \u6bcf\u6b21\u5e94\u8be5\u622a\u53d6\u591a\u957f\u7684\u4e00\u6bb5\uff1f<\/li>\n<\/ol>\n\n\n\n
      \u5982\u679c\u5141\u8bb8\u91cd\u53e0\uff0c\u5c31\u7528\u201c\u6ed1\u52a8\u7a97\u53e3\u201d\u7684\u601d\u8def\uff1a<\/p>\n\n\n\n
      for i in range(0, len(string) - len(sub_string) + 1):\n    \u5224\u65ad string[i:i + len(sub_string)] \u662f\u5426\u7b49\u4e8e sub_string\n<\/code><\/pre>\n\n\n\n
      \u8fd9\u662f\u5b57\u7b26\u4e32\u5339\u914d\u9898\u91cc\u975e\u5e38\u5e38\u89c1\u7684\u5165\u95e8\u5199\u6cd5\u3002<\/p>\n\n\n\n
      \n\n\n\n
      \u7ec3\u4e60<\/h2>\n\n\n\n
      \u8bf7\u4f60\u81ea\u5df1\u8bd5\u4e00\u9898\uff1a<\/p>\n\n\n\n
      \u8f93\u5165\uff1a<\/p>\n\n\n\n
      aaaa\naa\n<\/code><\/pre>\n\n\n\n
      \u8bf7\u95ee\u5b50\u5b57\u7b26\u4e32 \"aa\"<\/code> \u51fa\u73b0\u4e86\u51e0\u6b21\uff1f<\/p>\n\n\n\n
      \u63d0\u793a\uff1a\u4e0d\u8981\u53ea\u770b\u4e0d\u91cd\u53e0\u7684\u60c5\u51b5\uff0c\u8981\u4ece\u6bcf\u4e00\u4e2a\u4f4d\u7f6e\u5f00\u59cb\u68c0\u67e5\u3002
      \u8d77\u70b9\u5206\u522b\u662f 0\u30011\u30012<\/code>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u9898\u76ee\u8003\u70b9 \u8fd9\u9053\u9898\u4e3b\u8981\u8003\uff1a \u8fd9\u9898\u7684\u6838\u5fc3\u4e0d\u662f\u7b80\u5355\u4f7f\u7528 string.count(sub_string)\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u9898 […]<\/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-2186","post","type-post","status-publish","format-standard","hentry","category-text"],"_links":{"self":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/2186","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=2186"}],"version-history":[{"count":1,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/2186\/revisions"}],"predecessor-version":[{"id":2188,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/posts\/2186\/revisions\/2188"}],"wp:attachment":[{"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=2186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=2186"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.preluna.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=2186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}