{"id":949530,"date":"2024-12-27T00:13:48","date_gmt":"2024-12-26T16:13:48","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/949530.html"},"modified":"2024-12-27T00:13:50","modified_gmt":"2024-12-26T16:13:50","slug":"python%e5%a6%82%e4%bd%95%e4%bf%ae%e6%94%b9str","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/949530.html","title":{"rendered":"python\u5982\u4f55\u4fee\u6539str"},"content":{"rendered":"

\"python\u5982\u4f55\u4fee\u6539str\"<\/p>\n

Python\u4e2d\u4fee\u6539\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5\u3001\u5b57\u7b26\u4e32\u66ff\u6362\u3001\u8f6c\u6362\u4e3a\u5217\u8868\u5e76\u4fee\u6539\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u3002<\/strong>Python\u4e2d\u7684\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7c7b\u578b\uff0c\u8fd9\u610f\u5473\u7740\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u76f4\u63a5\u4fee\u6539\u3002\u8981\u6539\u53d8\u5b57\u7b26\u4e32\u7684\u5185\u5bb9\uff0c\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e9b\u65b9\u6cd5\u5b9e\u73b0\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5<\/strong>\u53ef\u4ee5\u901a\u8fc7\u5c06\u5b57\u7b26\u4e32\u5206\u5272\u4e3a\u591a\u4e2a\u90e8\u5206\uff0c\u7136\u540e\u91cd\u65b0\u7ec4\u5408\u4ee5\u5b9e\u73b0\u4fee\u6539\u3002\u4e0b\u9762\u8be6\u7ec6\u4ecb\u7ecd\u51e0\u79cd\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u5b57\u7b26\u4e32\u62fc\u63a5<\/p>\n<\/p>\n

\u5b57\u7b26\u4e32\u62fc\u63a5\u662f\u6700\u5e38\u7528\u7684\u4fee\u6539\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002\u901a\u8fc7\u5c06\u5b57\u7b26\u4e32\u5207\u5206\u4e3a\u591a\u4e2a\u90e8\u5206\uff0c\u7136\u540e\u5728\u9700\u8981\u7684\u5730\u65b9\u63d2\u5165\u6216\u4fee\u6539\u5b57\u7b26\uff0c\u518d\u5c06\u8fd9\u4e9b\u90e8\u5206\u62fc\u63a5\u6210\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n

    \n
  1. \n

    \u5b57\u7b26\u4e32\u5207\u7247<\/p>\n<\/p>\n

    \u5b57\u7b26\u4e32\u5207\u7247\u662f\u901a\u8fc7\u7d22\u5f15\u5c06\u5b57\u7b26\u4e32\u62c6\u5206\u4e3a\u591a\u4e2a\u90e8\u5206\u3002\u4f8b\u5982\uff0c\u8981\u4fee\u6539\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e2a\u5b57\u7b26\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u5207\u7247\u5c06\u5b57\u7b26\u4e32\u5206\u4e3a\u4e09\u4e2a\u90e8\u5206\uff1a\u8981\u4fee\u6539\u90e8\u5206\u4e4b\u524d\u7684\u90e8\u5206\u3001\u8981\u4fee\u6539\u7684\u90e8\u5206\uff0c\u4ee5\u53ca\u8981\u4fee\u6539\u90e8\u5206\u4e4b\u540e\u7684\u90e8\u5206\u3002<\/p>\n<\/p>\n

    original_str = "Hello World"<\/p>\n
    modified_str = original_str[:6] + "Python"<\/p>\n
    print(modified_str)  # \u8f93\u51fa: Hello Python<\/p>\n
    <\/code><\/pre>\n<\/p>\n<\/li>\n
  2. \n
    \u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/p>\n<\/p>\n
    \u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\uff08\u5982format<\/code>\u3001f-string<\/code>\u7b49\uff09\u53ef\u4ee5\u66f4\u7075\u6d3b\u5730\u4fee\u6539\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c06\u53d8\u91cf\u76f4\u63a5\u63d2\u5165\u5b57\u7b26\u4e32\u4e2d\uff1a<\/p>\n<\/p>\n
    name = "Python"<\/p>\n
    greeting = f"Hello {name}"<\/p>\n
    print(greeting)  # \u8f93\u51fa: Hello Python<\/p>\n
    <\/code><\/pre>\n<\/p>\n<\/li>\n<\/ol>\n
    \u4e8c\u3001\u5b57\u7b26\u4e32\u66ff\u6362<\/p>\n<\/p>\n
    \u5b57\u7b26\u4e32\u66ff\u6362\u662f\u901a\u8fc7\u5185\u5efa\u7684replace()<\/code>\u65b9\u6cd5\u6765\u5b9e\u73b0\u7684\u3002\u6b64\u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e2a\u5b50\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
      \n
    1. \n
      \u4f7f\u7528replace()<\/code>\u65b9\u6cd5<\/p>\n<\/p>\n
      replace()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u65e7\u5b50\u4e32\u4e3a\u65b0\u5b50\u4e32\u3002\u6b64\u65b9\u6cd5\u4e0d\u4f1a\u6539\u53d8\u539f\u5b57\u7b26\u4e32\uff0c\u800c\u662f\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
      text = "Hello World"<\/p>\n
      new_text = text.replace("World", "Python")<\/p>\n
      print(new_text)  # \u8f93\u51fa: Hello Python<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0creplace()<\/code>\u65b9\u6cd5\u662f\u533a\u5206\u5927\u5c0f\u5199\u7684\uff0c\u56e0\u6b64\u5728\u66ff\u6362\u65f6\u9700\u8981\u786e\u4fdd\u66ff\u6362\u9879\u4e0e\u76ee\u6807\u5b57\u7b26\u4e32\u4e2d\u7684\u5b50\u4e32\u5927\u5c0f\u5199\u5339\u914d\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
      \u4e09\u3001\u8f6c\u6362\u4e3a\u5217\u8868\u5e76\u4fee\u6539<\/p>\n<\/p>\n
      \u7531\u4e8e\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5217\u8868\uff0c\u4fee\u6539\u540e\u518d\u8f6c\u6362\u56de\u5b57\u7b26\u4e32\u3002\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u5bf9\u5b57\u7b26\u4e32\u4e2d\u7684\u591a\u4e2a\u5b57\u7b26\u8fdb\u884c\u590d\u6742\u4fee\u6539\u7684\u60c5\u51b5\u3002<\/p>\n<\/p>\n
        \n
      1. \n
        \u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5217\u8868<\/p>\n<\/p>\n
        \u53ef\u4ee5\u4f7f\u7528list()<\/code>\u51fd\u6570\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5217\u8868\uff0c\u7136\u540e\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u4fee\u6539\u5217\u8868\u4e2d\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n
        text = "Hello World"<\/p>\n
        text_list = list(text)<\/p>\n
        text_list[6:11] = list("Python")<\/p>\n
        modified_str = ''.join(text_list)<\/p>\n
        print(modified_str)  # \u8f93\u51fa: Hello Python<\/p>\n
        <\/code><\/pre>\n<\/p>\n<\/li>\n<\/ol>\n
        \u56db\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f<\/p>\n<\/p>\n
        \u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u6587\u672c\u5904\u7406\u5de5\u5177\uff0c\u9002\u7528\u4e8e\u590d\u6742\u7684\u5b57\u7b26\u4e32\u66ff\u6362\u548c\u6a21\u5f0f\u5339\u914d\u3002Python\u63d0\u4f9b\u4e86re<\/code>\u6a21\u5757\u7528\u4e8e\u6b63\u5219\u8868\u8fbe\u5f0f\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
          \n
        1. \n
          \u4f7f\u7528re.sub()<\/code>\u65b9\u6cd5<\/p>\n<\/p>\n
          re.sub()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u5e76\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u5185\u5bb9\u3002<\/p>\n<\/p>\n
          import re<\/p>\n
          text = "Hello 123, Hello 456"<\/p>\n
          new_text = re.sub(r'\\d+', 'Python', text)<\/p>\n
          print(new_text)  # \u8f93\u51fa: Hello Python, Hello Python<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\\d+<\/code>\u662f\u4e00\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5f0f\uff0c\u7528\u4e8e\u5339\u914d\u4e00\u4e2a\u6216\u591a\u4e2a\u6570\u5b57\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
          \u4e94\u3001\u603b\u7ed3<\/p>\n<\/p>\n
          \u4fee\u6539\u5b57\u7b26\u4e32\u5728Python\u4e2d\u867d\u7136\u4e0d\u80fd\u76f4\u63a5\u8fdb\u884c\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u6cd5\u95f4\u63a5\u5b9e\u73b0\uff0c\u5305\u62ec\u5b57\u7b26\u4e32\u62fc\u63a5\u3001\u5b57\u7b26\u4e32\u66ff\u6362\u3001\u8f6c\u6362\u4e3a\u5217\u8868\u5e76\u4fee\u6539\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f<\/strong>\u7b49\u65b9\u6cd5\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u5404\u79cd\u4fee\u6539\u548c\u5904\u7406\uff0c\u6ee1\u8db3\u4e0d\u540c\u7684\u7f16\u7a0b\u9700\u6c42\u3002<\/p>\n<\/p>\n
          \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
           \u5982\u4f55\u5728Python\u4e2d\u66f4\u6539\u5b57\u7b26\u4e32\u7684\u5185\u5bb9\uff1f<\/strong>
          Python\u4e2d\u7684\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u8fd9\u610f\u5473\u7740\u4e00\u65e6\u521b\u5efa\uff0c\u5b83\u4eec\u7684\u5185\u5bb9\u65e0\u6cd5\u76f4\u63a5\u4fee\u6539\u3002\u5982\u679c\u9700\u8981\u4fee\u6539\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u901a\u8fc7\u5b57\u7b26\u4e32\u62fc\u63a5\u3001\u683c\u5f0f\u5316\u6216\u4f7f\u7528\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u6765\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528str.replace()<\/code>\u65b9\u6cd5\u6765\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u7279\u5b9a\u5b57\u7b26\u6216\u5b50\u5b57\u7b26\u4e32\u3002<\/p>\n
          \u5728Python\u4e2d\uff0c\u6709\u54ea\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u7279\u5b9a\u5b57\u7b26\uff1f<\/strong>
          \u53ef\u4ee5\u4f7f\u7528\u51e0\u79cd\u65b9\u6cd5\u6765\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u3002\u6700\u5e38\u7528\u7684\u662fstr.replace(old, new)<\/code>\u65b9\u6cd5\uff0c\u5b83\u5c06\u6240\u6709\u51fa\u73b0\u7684old<\/code>\u5b57\u7b26\u66ff\u6362\u4e3anew<\/code>\u5b57\u7b26\u3002\u8fd8\u53ef\u4ee5\u4f7f\u7528str.translate()<\/code>\u65b9\u6cd5\u7ed3\u5408str.maketrans()<\/code>\u6765\u8fdb\u884c\u66f4\u590d\u6742\u7684\u5b57\u7b26\u66ff\u6362\u3002\u6b64\u5916\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u4e5f\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u6587\u672c\u66ff\u6362\u529f\u80fd\uff0c\u4f7f\u7528re.sub(pattern, replacement, string)<\/code>\u53ef\u4ee5\u6839\u636e\u6a21\u5f0f\u5339\u914d\u8fdb\u884c\u66ff\u6362\u3002<\/p>\n
          \u5982\u4f55\u5728Python\u4e2d\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5927\u5199\u6216\u5c0f\u5199\uff1f<\/strong>
          Python\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u6539\u53d8\u5b57\u7b26\u4e32\u7684\u5927\u5c0f\u5199\u3002\u53ef\u4ee5\u4f7f\u7528str.upper()<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5168\u5927\u5199\uff0c\u4f7f\u7528str.lower()<\/code>\u65b9\u6cd5\u5c06\u5176\u8f6c\u6362\u4e3a\u5168\u5c0f\u5199\u3002\u6b64\u5916\uff0cstr.title()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u7684\u6bcf\u4e2a\u5355\u8bcd\u7684\u9996\u5b57\u6bcd\u8f6c\u6362\u4e3a\u5927\u5199\uff0c\u800cstr.capitalize()<\/code>\u5219\u5c06\u5b57\u7b26\u4e32\u7684\u9996\u5b57\u6bcd\u8f6c\u6362\u4e3a\u5927\u5199\uff0c\u5176\u4f59\u5b57\u6bcd\u8f6c\u6362\u4e3a\u5c0f\u5199\u3002\u8fd9\u4e9b\u65b9\u6cd5\u90fd\u4e0d\u4f1a\u4fee\u6539\u539f\u59cb\u5b57\u7b26\u4e32\uff0c\u800c\u662f\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u4e2d\u4fee\u6539\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5\u3001\u5b57\u7b26\u4e32\u66ff\u6362\u3001\u8f6c\u6362\u4e3a\u5217\u8868\u5e76\u4fee\u6539\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u3002Python […]","protected":false},"author":3,"featured_media":949535,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/949530"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=949530"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/949530\/revisions"}],"predecessor-version":[{"id":949536,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/949530\/revisions\/949536"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/949535"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=949530"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=949530"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=949530"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}