{"id":987887,"date":"2024-12-27T07:57:29","date_gmt":"2024-12-26T23:57:29","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/987887.html"},"modified":"2024-12-27T07:57:31","modified_gmt":"2024-12-26T23:57:31","slug":"replace%e5%87%bd%e6%95%b0%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8python","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/987887.html","title":{"rendered":"replace\u51fd\u6570\u5982\u4f55\u4f7f\u7528python"},"content":{"rendered":"

\"replace\u51fd\u6570\u5982\u4f55\u4f7f\u7528python\"<\/p>\n

\u5728Python\u4e2d\uff0creplace<\/code>\u51fd\u6570\u662f\u7528\u4e8e\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u6307\u5b9a\u90e8\u5206\u7684\u4e00\u4e2a\u975e\u5e38\u5b9e\u7528\u7684\u65b9\u6cd5\u3002replace\u51fd\u6570\u7684\u57fa\u672c\u7528\u6cd5\u662f\u7528\u65b0\u5b57\u7b26\u4e32\u66ff\u6362\u6389\u65e7\u5b57\u7b26\u4e32\u3001\u652f\u6301\u5bf9\u5b57\u7b26\u4e32\u7684\u5c40\u90e8\u66ff\u6362\u3001\u53ef\u4ee5\u6307\u5b9a\u66ff\u6362\u7684\u6b21\u6570<\/strong>\u3002\u4e0b\u9762\u6211\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528replace<\/code>\u51fd\u6570\uff0c\u5e76\u4e3a\u60a8\u63d0\u4f9b\u4e00\u4e9b\u793a\u4f8b\u548c\u6280\u5de7\u3002<\/p>\n<\/p>\n

\u4e00\u3001REPLACE\u51fd\u6570\u7684\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n

replace<\/code>\u51fd\u6570\u4e3b\u8981\u7528\u4e8e\u5b57\u7b26\u4e32\u4e2d\u67d0\u4e00\u90e8\u5206\u7684\u66ff\u6362\u3002\u5b83\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<\/p>\n

str.replace(old, new[, count])<\/p>\n
<\/code><\/pre>\n<\/p>\n
    \n
  • old<\/strong>: \u9700\u8981\u88ab\u66ff\u6362\u7684\u65e7\u5b57\u7b26\u4e32\u3002<\/li>\n
  • new<\/strong>: \u7528\u4e8e\u66ff\u6362\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n
  • count<\/strong>: \u53ef\u9009\u53c2\u6570\uff0c\u6307\u5b9a\u66ff\u6362\u7684\u6b21\u6570\u3002\u5982\u679c\u4e0d\u6307\u5b9a\uff0c\u9ed8\u8ba4\u66ff\u6362\u6240\u6709\u5339\u914d\u7684\u90e8\u5206\u3002<\/li>\n<\/ul>\n
    \u4f8b\u5982\uff1a<\/p>\n<\/p>\n
    text = "Hello world! Hello everyone!"<\/p>\n
    new_text = text.replace("Hello", "Hi")<\/p>\n
    print(new_text)  # \u8f93\u51fa: "Hi world! Hi everyone!"<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u7528replace<\/code>\u51fd\u6570\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684"Hello"\u66ff\u6362\u4e3a\u4e86"Hi"\u3002<\/p>\n<\/p>\n
    \u4e8c\u3001\u6307\u5b9a\u66ff\u6362\u6b21\u6570<\/h3>\n<\/p>\n
    replace<\/code>\u51fd\u6570\u5141\u8bb8\u6211\u4eec\u6307\u5b9a\u66ff\u6362\u7684\u6b21\u6570\uff0c\u8fd9\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ea\u60f3\u66ff\u6362\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684"Hello"\uff1a<\/p>\n<\/p>\n
    text = "Hello world! Hello everyone!"<\/p>\n
    new_text = text.replace("Hello", "Hi", 1)<\/p>\n
    print(new_text)  # \u8f93\u51fa: "Hi world! Hello everyone!"<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u53ea\u6709\u7b2c\u4e00\u4e2a"Hello"\u88ab\u66ff\u6362\u6210\u4e86"Hi"\u3002<\/p>\n<\/p>\n
    \u4e09\u3001\u5904\u7406\u4e0d\u53ef\u53d8\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n
    Python\u4e2d\u7684\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u8fd9\u610f\u5473\u7740\u4f7f\u7528replace<\/code>\u51fd\u6570\u5e76\u4e0d\u4f1a\u6539\u53d8\u539f\u59cb\u5b57\u7b26\u4e32\uff0c\u800c\u662f\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002\u56e0\u6b64\uff0c\u60a8\u9700\u8981\u5c06\u7ed3\u679c\u8d4b\u503c\u7ed9\u4e00\u4e2a\u65b0\u7684\u53d8\u91cf\u6216\u539f\u53d8\u91cf\uff1a<\/p>\n<\/p>\n
    text = "Hello world!"<\/p>\n
    text = text.replace("world", "Python")<\/p>\n
    print(text)  # \u8f93\u51fa: "Hello Python!"<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u56db\u3001\u66ff\u6362\u591a\u4e2a\u4e0d\u540c\u7684\u5b50\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n
    \u5982\u679c\u9700\u8981\u66ff\u6362\u591a\u4e2a\u4e0d\u540c\u7684\u5b50\u5b57\u7b26\u4e32\uff0c\u60a8\u53ef\u4ee5\u591a\u6b21\u8c03\u7528replace<\/code>\u51fd\u6570\uff0c\u6216\u8005\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5e93re<\/code>\u6765\u5b9e\u73b0\u66f4\u590d\u6742\u7684\u66ff\u6362\uff1a<\/p>\n<\/p>\n
    import re<\/p>\n
    text = "Hello world! Good morning, world!"<\/p>\n
    \u4f7f\u7528re.sub\u8fdb\u884c\u590d\u6742\u66ff\u6362<\/strong><\/h2>\n
    new_text = re.sub(r"world|morning", "Python", text)<\/p>\n
    print(new_text)  # \u8f93\u51fa: "Hello Python! Good Python, Python!"<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u4e94\u3001\u5904\u7406\u5927\u5c0f\u5199\u654f\u611f<\/h3>\n<\/p>\n
    \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0creplace<\/code>\u51fd\u6570\u662f\u5927\u5c0f\u5199\u654f\u611f\u7684\u3002\u5982\u679c\u9700\u8981\u8fdb\u884c\u5927\u5c0f\u5199\u4e0d\u654f\u611f\u7684\u66ff\u6362\uff0c\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u76f8\u540c\u7684\u5927\u5c0f\u5199\u8fdb\u884c\u66ff\u6362\uff1a<\/p>\n<\/p>\n
    text = "Hello World! hello world!"<\/p>\n
    new_text = text.lower().replace("hello", "hi")<\/p>\n
    print(new_text)  # \u8f93\u51fa: "hi world! hi world!"<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u516d\u3001\u5e94\u7528\u573a\u666f\u4e0e\u6ce8\u610f\u4e8b\u9879<\/h3>\n<\/p>\n
      \n
    1. \n
      \u6570\u636e\u6e05\u7406\u548c\u9884\u5904\u7406<\/strong>\uff1areplace<\/code>\u51fd\u6570\u5728\u6570\u636e\u6e05\u7406\u548c\u9884\u5904\u7406\u4e2d\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u66ff\u6362\u6389\u4e0d\u9700\u8981\u7684\u5b57\u7b26\u6216\u683c\u5f0f\u5316\u6587\u672c\u3002<\/p>\n<\/p>\n<\/li>\n
    2. \n
      \u6a21\u677f\u66ff\u6362<\/strong>\uff1a\u53ef\u4ee5\u7528\u4e8e\u7b80\u5355\u7684\u6a21\u677f\u66ff\u6362\uff0c\u4f8b\u5982\u751f\u6210\u52a8\u6001\u7684HTML\u6216\u6587\u6863\u3002<\/p>\n<\/p>\n<\/li>\n
    3. \n
      \u654f\u611f\u8bcd\u8fc7\u6ee4<\/strong>\uff1a\u5728\u804a\u5929\u7cfb\u7edf\u6216\u8bc4\u8bba\u7cfb\u7edf\u4e2d\uff0c\u53ef\u4ee5\u7528\u6765\u66ff\u6362\u654f\u611f\u8bcd\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
      \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0creplace<\/code>\u51fd\u6570\u66ff\u6362\u662f\u5168\u5c40\u7684\uff0c\u9664\u975e\u6307\u5b9a\u6b21\u6570\uff0c\u5426\u5219\u5b83\u4f1a\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u7684\u5339\u914d\u9879\u3002<\/p>\n<\/p>\n
      \u4e03\u3001\u6027\u80fd\u8003\u8651<\/h3>\n<\/p>\n
      \u5728\u5904\u7406\u5927\u91cf\u6570\u636e\u65f6\uff0c\u9891\u7e41\u4f7f\u7528replace<\/code>\u53ef\u80fd\u4f1a\u5f71\u54cd\u6027\u80fd\u3002\u5bf9\u4e8e\u7b80\u5355\u66ff\u6362\uff0creplace<\/code>\u51fd\u6570\u975e\u5e38\u9ad8\u6548\uff0c\u4f46\u5bf9\u4e8e\u590d\u6742\u7684\u66ff\u6362\u9700\u6c42\uff0c\u4f7f\u7528re<\/code>\u5e93\u53ef\u80fd\u4f1a\u66f4\u5408\u9002\u3002<\/p>\n<\/p>\n
      \u603b\u7ed3\u6765\u8bf4\uff0cPython\u7684replace<\/code>\u51fd\u6570\u662f\u4e00\u4e2a\u7b80\u5355\u800c\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u9002\u7528\u4e8e\u5b57\u7b26\u4e32\u66ff\u6362\u7684\u591a\u79cd\u573a\u666f\u3002\u901a\u8fc7\u7ed3\u5408\u5176\u4ed6\u5b57\u7b26\u4e32\u64cd\u4f5c\u548c\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u60a8\u53ef\u4ee5\u5904\u7406\u66f4\u590d\u6742\u7684\u6587\u672c\u66ff\u6362\u4efb\u52a1\u3002\u65e0\u8bba\u662f\u6570\u636e\u6e05\u7406\u3001\u6a21\u677f\u751f\u6210\u8fd8\u662f\u654f\u611f\u8bcd\u8fc7\u6ee4\uff0creplace<\/code>\u51fd\u6570\u90fd\u80fd\u63d0\u4f9b\u6709\u6548\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<\/p>\n
      \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
       \u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528replace\u51fd\u6570\u6765\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u7279\u5b9a\u5b57\u7b26\uff1f<\/strong>
      replace\u51fd\u6570\u5728Python\u4e2d\u7528\u4e8e\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u7279\u5b9a\u5b57\u7b26\u6216\u5b50\u5b57\u7b26\u4e32\u3002\u5176\u57fa\u672c\u8bed\u6cd5\u4e3astring.replace(old, new, count)<\/code>\uff0c\u5176\u4e2dold<\/code>\u662f\u8981\u88ab\u66ff\u6362\u7684\u5b57\u7b26\u6216\u5b50\u5b57\u7b26\u4e32\uff0cnew<\/code>\u662f\u7528\u4e8e\u66ff\u6362\u7684\u5b57\u7b26\u6216\u5b50\u5b57\u7b26\u4e32\uff0ccount<\/code>\u662f\u53ef\u9009\u7684\uff0c\u8868\u793a\u66ff\u6362\u7684\u6b21\u6570\u3002\u5982\u679c\u4e0d\u6307\u5b9a\uff0c\u9ed8\u8ba4\u4f1a\u66ff\u6362\u6240\u6709\u51fa\u73b0\u7684old<\/code>\u3002\u4f8b\u5982\uff0c"hello world".replace("world", "Python")<\/code>\u5c06\u8fd4\u56de"hello Python"<\/code>\u3002<\/p>\n
      replace\u51fd\u6570\u80fd\u5426\u5904\u7406\u5927\u5c0f\u5199\u7684\u66ff\u6362\uff1f<\/strong>
      \u5728\u4f7f\u7528replace\u51fd\u6570\u65f6\uff0c\u66ff\u6362\u662f\u533a\u5206\u5927\u5c0f\u5199\u7684\u3002\u8fd9\u610f\u5473\u7740\u5982\u679c\u4f60\u5e0c\u671b\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e2a\u5355\u8bcd\u800c\u4e0d\u8003\u8651\u5176\u5927\u5c0f\u5199\uff0c\u4f60\u9700\u8981\u5148\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u7edf\u4e00\u7684\u5927\u5c0f\u5199\u5f62\u5f0f\uff0c\u4f8b\u5982\u4f7f\u7528lower()<\/code>\u6216upper()<\/code>\u65b9\u6cd5\u3002\u8fd9\u6837\u53ef\u4ee5\u786e\u4fdd\u66ff\u6362\u65f6\u4e0d\u4f1a\u9057\u6f0f\u4efb\u4f55\u5339\u914d\u9879\u3002<\/p>\n
      \u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528replace\u51fd\u6570\u6765\u5220\u9664\u5b57\u7b26\uff1f<\/strong>
      \u5982\u679c\u60f3\u8981\u5220\u9664\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e2a\u5b57\u7b26\uff0c\u53ef\u4ee5\u5c06\u8be5\u5b57\u7b26\u4f5c\u4e3aold<\/code>\u4f20\u9012\u7ed9replace\u51fd\u6570\uff0c\u5e76\u5c06new<\/code>\u8bbe\u7f6e\u4e3a\u7a7a\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c"hello world".replace("o", "")<\/code>\u5c06\u8fd4\u56de"hell wrld"<\/code>\uff0c\u8fd9\u6837\u5c31\u6709\u6548\u5730\u5220\u9664\u4e86\u6240\u6709\u7684'o'\u5b57\u7b26\u3002\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u6709\u6548\uff0c\u9002\u5408\u5feb\u901f\u6e05\u9664\u5b57\u7b26\u4e32\u4e2d\u7684\u7279\u5b9a\u5b57\u7b26\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0creplace\u51fd\u6570\u662f\u7528\u4e8e\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u6307\u5b9a\u90e8\u5206\u7684\u4e00\u4e2a\u975e\u5e38\u5b9e\u7528\u7684\u65b9\u6cd5\u3002replace\u51fd\u6570\u7684\u57fa\u672c\u7528 […]","protected":false},"author":3,"featured_media":987895,"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\/987887"}],"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=987887"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/987887\/revisions"}],"predecessor-version":[{"id":987898,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/987887\/revisions\/987898"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/987895"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=987887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=987887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=987887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}