{"id":962848,"date":"2024-12-27T04:12:07","date_gmt":"2024-12-26T20:12:07","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/962848.html"},"modified":"2024-12-27T04:12:09","modified_gmt":"2024-12-26T20:12:09","slug":"python%e5%a6%82%e4%bd%95%e6%9f%a5%e7%9c%8b%e5%ad%97%e7%ac%a6%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/962848.html","title":{"rendered":"python\u5982\u4f55\u67e5\u770b\u5b57\u7b26\u7c7b\u578b"},"content":{"rendered":"

\"python\u5982\u4f55\u67e5\u770b\u5b57\u7b26\u7c7b\u578b\"<\/p>\n

\u8981\u67e5\u770bPython\u4e2d\u7684\u5b57\u7b26\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u51fd\u6570type()<\/code>\u3001\u901a\u8fc7isinstance()<\/code>\u51fd\u6570\u8fdb\u884c\u7c7b\u578b\u68c0\u67e5\u3001\u5229\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5224\u65ad\u5b57\u7b26\u7c7b\u578b\u7b49\u65b9\u6cd5\u3002<\/strong>\u4f7f\u7528type()<\/code>\u51fd\u6570\u53ef\u4ee5\u76f4\u63a5\u67e5\u770b\u53d8\u91cf\u7684\u7c7b\u578b\uff0cisinstance()<\/code>\u51fd\u6570\u53ef\u4ee5\u68c0\u67e5\u53d8\u91cf\u662f\u5426\u5c5e\u4e8e\u67d0\u79cd\u7c7b\u578b\uff0c\u800c\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5e2e\u52a9\u5224\u65ad\u5b57\u7b26\u662f\u5426\u4e3a\u7279\u5b9a\u7c7b\u578b\uff08\u5982\u5b57\u6bcd\u3001\u6570\u5b57\u7b49\uff09\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528\u5185\u7f6e\u51fd\u6570type()<\/code><\/p>\n<\/p>\n

\u4f7f\u7528type()<\/code>\u51fd\u6570\u662f\u6700\u7b80\u5355\u76f4\u63a5\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002\u5b83\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u67e5\u770b\u4efb\u4f55\u53d8\u91cf\u7684\u7c7b\u578b\uff0c\u5305\u62ec\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n

char = 'a'<\/p>\n
print(type(char))  # \u8f93\u51fa\uff1a<class 'str'><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728Python\u4e2d\uff0c\u5355\u4e2a\u5b57\u7b26\u4e5f\u662f\u5b57\u7b26\u4e32\u7c7b\u578b\uff08str<\/code>\uff09\u3002\u56e0\u6b64\uff0c\u65e0\u8bba\u662f\u5355\u4e2a\u5b57\u7b26\u8fd8\u662f\u5b57\u7b26\u4e32\uff0c\u4f7f\u7528type()<\/code>\u51fd\u6570\u90fd\u4f1a\u8fd4\u56de<class 'str'><\/code>\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u901a\u8fc7isinstance()<\/code>\u8fdb\u884c\u7c7b\u578b\u68c0\u67e5<\/p>\n<\/p>\n
isinstance()<\/code>\u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u68c0\u67e5\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u5c5e\u4e8e\u67d0\u79cd\u7c7b\u578b\u3002\u8fd9\u5728\u9700\u8981\u5904\u7406\u591a\u79cd\u6570\u636e\u7c7b\u578b\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
char = 'a'<\/p>\n
if isinstance(char, str):<\/p>\n
    print("\u8fd9\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u7c7b\u578b")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u53ef\u4ee5\u7528\u4e8e\u68c0\u67e5\u5b57\u7b26\u7c7b\u578b\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u68c0\u67e5\u5176\u4ed6\u6570\u636e\u7c7b\u578b\uff0c\u5982\u6574\u6570\u3001\u6d6e\u70b9\u6570\u7b49\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u5229\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5224\u65ad\u5b57\u7b26\u7c7b\u578b<\/p>\n<\/p>\n
\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u6765\u5339\u914d\u5b57\u7b26\u4e32\u4e2d\u7684\u6a21\u5f0f\u3002\u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u5224\u65ad\u5b57\u7b26\u662f\u5426\u4e3a\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u6807\u70b9\u7b26\u53f7\u7b49\u3002<\/p>\n<\/p>\n
    \n
  1. \u5224\u65ad\u662f\u5426\u4e3a\u5b57\u6bcd\uff1a<\/li>\n<\/ol>\n
    import re<\/p>\n
    char = 'a'<\/p>\n
    if re.match(r'[A-Za-z]', char):<\/p>\n
        print("\u8fd9\u662f\u4e00\u4e2a\u5b57\u6bcd")<\/p>\n
    <\/code><\/pre>\n<\/p>\n
      \n
    1. \u5224\u65ad\u662f\u5426\u4e3a\u6570\u5b57\uff1a<\/li>\n<\/ol>\n
      char = '3'<\/p>\n
      if re.match(r'\\d', char):<\/p>\n
          print("\u8fd9\u662f\u4e00\u4e2a\u6570\u5b57")<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      \u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u5bf9\u5b57\u7b26\u8fdb\u884c\u66f4\u7cbe\u7ec6\u7684\u5206\u7c7b\u548c\u5224\u65ad\u3002<\/p>\n<\/p>\n
      \u56db\u3001\u5229\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u8fdb\u884c\u5224\u65ad<\/p>\n<\/p>\n
      Python\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\u63d0\u4f9b\u4e86\u8bb8\u591a\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5224\u65ad\u5b57\u7b26\u7c7b\u578b\u3002<\/p>\n<\/p>\n
        \n
      1. \u4f7f\u7528str.isalpha()<\/code>\u5224\u65ad\u662f\u5426\u4e3a\u5b57\u6bcd\uff1a<\/li>\n<\/ol>\n
        char = 'a'<\/p>\n
        if char.isalpha():<\/p>\n
            print("\u8fd9\u662f\u4e00\u4e2a\u5b57\u6bcd")<\/p>\n
        <\/code><\/pre>\n<\/p>\n
          \n
        1. \u4f7f\u7528str.isdigit()<\/code>\u5224\u65ad\u662f\u5426\u4e3a\u6570\u5b57\uff1a<\/li>\n<\/ol>\n
          char = '3'<\/p>\n
          if char.isdigit():<\/p>\n
              print("\u8fd9\u662f\u4e00\u4e2a\u6570\u5b57")<\/p>\n
          <\/code><\/pre>\n<\/p>\n
            \n
          1. \u4f7f\u7528str.isalnum()<\/code>\u5224\u65ad\u662f\u5426\u4e3a\u5b57\u6bcd\u6216\u6570\u5b57\uff1a<\/li>\n<\/ol>\n
            char = 'a3'<\/p>\n
            if char.isalnum():<\/p>\n
                print("\u8fd9\u662f\u4e00\u4e2a\u5b57\u6bcd\u6216\u6570\u5b57")<\/p>\n
            <\/code><\/pre>\n<\/p>\n
            \u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u5feb\u901f\u5224\u65ad\u5b57\u7b26\u7684\u7c7b\u578b\uff0c\u5e76\u5728\u7a0b\u5e8f\u4e2d\u505a\u51fa\u76f8\u5e94\u7684\u5904\u7406\u3002\u603b\u7ed3\u6765\u8bf4\uff0cPython\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u67e5\u770b\u5b57\u7b26\u7c7b\u578b\uff0c\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6548\u7387\u3002<\/p>\n<\/p>\n
            \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
             \u5982\u4f55\u5728Python\u4e2d\u68c0\u67e5\u4e00\u4e2a\u53d8\u91cf\u7684\u7c7b\u578b\uff1f<\/strong>
            \u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684type()<\/code>\u51fd\u6570\u6765\u68c0\u67e5\u53d8\u91cf\u7684\u7c7b\u578b\u3002\u4f8b\u5982\uff0ctype(variable)<\/code>\u5c06\u8fd4\u56de\u53d8\u91cf\u7684\u7c7b\u578b\u3002\u5982\u679c\u4f60\u60f3\u8981\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u7279\u5b9a\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528isinstance()<\/code>\u51fd\u6570\uff0c\u4f8b\u5982isinstance(variable, str)<\/code>\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff0c\u8868\u793a\u8be5\u53d8\u91cf\u662f\u5426\u4e3a\u5b57\u7b26\u4e32\u7c7b\u578b\u3002<\/p>\n
            Python\u4e2d\u5e38\u7528\u7684\u5b57\u7b26\u7c7b\u578b\u6709\u54ea\u4e9b\uff1f<\/strong>
            \u5728Python\u4e2d\uff0c\u4e3b\u8981\u7684\u5b57\u7b26\u7c7b\u578b\u662f\u5b57\u7b26\u4e32\uff08str<\/code>\uff09\u3002\u5b57\u7b26\u4e32\u662f\u4e00\u7cfb\u5217\u5b57\u7b26\u7684\u96c6\u5408\uff0c\u53ef\u4ee5\u7528\u5355\u5f15\u53f7\u3001\u53cc\u5f15\u53f7\u6216\u4e09\u91cd\u5f15\u53f7\u5b9a\u4e49\u3002\u6b64\u5916\uff0cPython\u8fd8\u652f\u6301Unicode\u5b57\u7b26\uff0c\u8fd9\u4f7f\u5f97\u53ef\u4ee5\u5904\u7406\u5404\u79cd\u8bed\u8a00\u7684\u5b57\u7b26\u3002<\/p>\n
            \u5982\u4f55\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\u6216\u5305\u542b\u7279\u5b9a\u5b57\u7b26\uff1f<\/strong>
            \u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u68c0\u67e5\u5b57\u7b26\u4e32\u7684\u5e03\u5c14\u503c\uff0cif not string:<\/code> \u4f1a\u8fd4\u56deTrue\u3002\u5982\u679c\u60f3\u8981\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u5305\u542b\u7279\u5b9a\u5b57\u7b26\uff0c\u53ef\u4ee5\u4f7f\u7528in<\/code>\u5173\u952e\u5b57\uff0c\u4f8b\u5982if 'a' in string:<\/code>\uff0c\u8fd9\u5c06\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff0c\u6307\u793a\u5b57\u7b26\u662f\u5426\u5b58\u5728\u4e8e\u5b57\u7b26\u4e32\u4e2d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u8981\u67e5\u770bPython\u4e2d\u7684\u5b57\u7b26\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u51fd\u6570type()\u3001\u901a\u8fc7isinstance()\u51fd\u6570\u8fdb\u884c\u7c7b\u578b\u68c0\u67e5\u3001\u5229 […]","protected":false},"author":3,"featured_media":962855,"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\/962848"}],"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=962848"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/962848\/revisions"}],"predecessor-version":[{"id":962856,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/962848\/revisions\/962856"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/962855"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=962848"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=962848"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=962848"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}