{"id":921606,"date":"2024-12-26T14:15:51","date_gmt":"2024-12-26T06:15:51","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/921606.html"},"modified":"2024-12-26T14:15:53","modified_gmt":"2024-12-26T06:15:53","slug":"python%e4%b8%ad%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%ad%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/921606.html","title":{"rendered":"python\u4e2d\u5982\u4f55\u5224\u65ad\u6570\u636e\u7c7b\u578b"},"content":{"rendered":"

\"python\u4e2d\u5982\u4f55\u5224\u65ad\u6570\u636e\u7c7b\u578b\"<\/p>\n

\u5728Python\u4e2d\uff0c\u5224\u65ad\u6570\u636e\u7c7b\u578b\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528\u5185\u7f6e\u51fd\u6570type()<\/code>\u3001isinstance()<\/code>\u3001\u5229\u7528collections<\/code>\u6a21\u5757\u4e2d\u7684\u7279\u5b9a\u7c7b\u578b\u7c7b\u8fdb\u884c\u5224\u65ad\u3002<\/strong> \u8fd9\u4e9b\u65b9\u6cd5\u5404\u6709\u4f18\u52a3\uff0c\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u573a\u666f\u3002\u4f7f\u7528type()<\/code>\u53ef\u4ee5\u76f4\u63a5\u83b7\u53d6\u53d8\u91cf\u7684\u7c7b\u578b\uff0c\u4f46\u901a\u5e38\u7528\u4e8e\u8c03\u8bd5\uff0c\u800c\u4e0d\u662f\u8fdb\u884c\u7c7b\u578b\u6bd4\u8f83\uff1bisinstance()<\/code>\u662f\u66f4\u5e38\u7528\u7684\u9009\u62e9\uff0c\u56e0\u4e3a\u5b83\u4e0d\u4ec5\u53ef\u4ee5\u5224\u65ad\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff0c\u8fd8\u80fd\u5224\u65ad\u7ee7\u627f\u5173\u7cfb\uff1bcollections<\/code>\u6a21\u5757\u4e2d\u7684\u7c7b\u578b\u7c7b\u5219\u63d0\u4f9b\u4e86\u5bf9\u66f4\u590d\u6742\u6570\u636e\u7ed3\u6784\u7684\u5224\u65ad\u3002\u4e0b\u9762\u6211\u4eec\u8be6\u7ec6\u63a2\u8ba8\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528type()<\/code>\u51fd\u6570<\/h3>\n<\/p>\n

type()<\/code>\u51fd\u6570\u662fPython\u4e2d\u6700\u76f4\u63a5\u7684\u83b7\u53d6\u53d8\u91cf\u7c7b\u578b\u7684\u65b9\u6cd5\u3002\u5b83\u8fd4\u56de\u4e00\u4e2a\u53d8\u91cf\u7684\u7c7b\u578b\u5bf9\u8c61\uff1a<\/p>\n<\/p>\n

x = 10<\/p>\n
print(type(x))  # <class 'int'><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u573a\u666f<\/h4>\n<\/p>\n
    \n
  1. \u8c03\u8bd5<\/strong>\uff1a\u5f53\u5f00\u53d1\u8005\u9700\u8981\u68c0\u67e5\u7a0b\u5e8f\u4e2d\u53d8\u91cf\u7684\u7c7b\u578b\u65f6\uff0ctype()<\/code>\u662f\u4e00\u4e2a\u5feb\u901f\u7684\u65b9\u6cd5\u3002<\/li>\n
  2. \u7b80\u5355\u7c7b\u578b\u5224\u65ad<\/strong>\uff1a\u9002\u7528\u4e8e\u7b80\u5355\u5224\u65ad\uff0c\u4e0d\u6d89\u53ca\u590d\u6742\u7ee7\u627f\u5173\u7cfb\u3002<\/li>\n<\/ol>\n
    \u4e0d\u8db3\u4e4b\u5904<\/h4>\n<\/p>\n
      \n
    • \u4e0d\u652f\u6301\u7ee7\u627f\u68c0\u67e5<\/strong>\uff1atype()<\/code>\u4e0d\u8003\u8651\u7ee7\u627f\u5c42\u6b21\uff0c\u53ea\u80fd\u68c0\u67e5\u53d8\u91cf\u76f4\u63a5\u7684\u7c7b\u578b\u3002<\/li>\n<\/ul>\n
      \u4e8c\u3001\u4f7f\u7528isinstance()<\/code>\u51fd\u6570<\/h3>\n<\/p>\n
      isinstance()<\/code>\u51fd\u6570\u662f\u5224\u65ad\u53d8\u91cf\u7c7b\u578b\u7684\u6700\u4f73\u5b9e\u8df5\uff0c\u5b83\u4e0d\u4ec5\u53ef\u4ee5\u5224\u65ad\u53d8\u91cf\u7684\u76f4\u63a5\u7c7b\u578b\uff0c\u8fd8\u80fd\u5224\u65ad\u53d8\u91cf\u7684\u7ee7\u627f\u7c7b\u578b\uff1a<\/p>\n<\/p>\n
      class Animal:<\/p>\n
          pass<\/p>\n
      class Dog(Animal):<\/p>\n
          pass<\/p>\n
      d = Dog()<\/p>\n
      print(isinstance(d, Dog))  # True<\/p>\n
      print(isinstance(d, Animal))  # True<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      \u4f18\u52bf<\/h4>\n<\/p>\n
        \n
      1. \u652f\u6301\u7ee7\u627f\u5173\u7cfb<\/strong>\uff1a\u80fd\u5224\u65ad\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u662f\u67d0\u4e2a\u7c7b\u6216\u5176\u5b50\u7c7b\u7684\u5b9e\u4f8b\u3002<\/li>\n
      2. \u591a\u7c7b\u578b\u68c0\u67e5<\/strong>\uff1a\u53ef\u4ee5\u68c0\u67e5\u591a\u4e2a\u7c7b\u578b\uff0c\u53c2\u6570\u53ef\u4ee5\u662f\u4e00\u4e2a\u5143\u7ec4\uff1a<\/li>\n<\/ol>\n
        x = 10<\/p>\n
        print(isinstance(x, (int, float)))  # True<\/p>\n
        <\/code><\/pre>\n<\/p>\n
        \u4f7f\u7528\u573a\u666f<\/h4>\n<\/p>\n
          \n
        • \u9762\u5411\u5bf9\u8c61\u7f16\u7a0b<\/strong>\uff1a\u5728\u9700\u8981\u8003\u8651\u7ee7\u627f\u5173\u7cfb\u7684\u60c5\u51b5\u4e0b\uff0cisinstance()<\/code>\u662f\u9996\u9009\u3002<\/li>\n
        • \u591a\u7c7b\u578b\u5224\u65ad<\/strong>\uff1a\u5f53\u4e00\u4e2a\u53d8\u91cf\u53ef\u80fd\u662f\u591a\u79cd\u7c7b\u578b\u4e4b\u4e00\u65f6\uff0cisinstance()<\/code>\u53ef\u4ee5\u63d0\u4f9b\u65b9\u4fbf\u7684\u5224\u65ad\u3002<\/li>\n<\/ul>\n
          \u4e09\u3001\u5229\u7528collections<\/code>\u6a21\u5757\u8fdb\u884c\u590d\u6742\u7c7b\u578b\u5224\u65ad<\/h3>\n<\/p>\n
          Python\u7684collections<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86\u4e00\u4e9b\u9ad8\u7ea7\u7684\u5bb9\u5668\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u4ee5\u5e2e\u52a9\u5224\u65ad\u66f4\u590d\u6742\u7684\u6570\u636e\u7ed3\u6784\u7c7b\u578b\uff0c\u4f8b\u5982\uff1anamedtuple<\/code>\u3001deque<\/code>\u3001Counter<\/code>\u7b49\u3002<\/p>\n<\/p>\n
          from collections import deque<\/p>\n
          d = deque([1, 2, 3])<\/p>\n
          print(isinstance(d, deque))  # True<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u4f7f\u7528\u573a\u666f<\/h4>\n<\/p>\n
            \n
          • \u590d\u6742\u6570\u636e\u7ed3\u6784<\/strong>\uff1a\u5f53\u9700\u8981\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u662f\u7279\u5b9a\u7684\u590d\u6742\u6570\u636e\u7ed3\u6784\u65f6\uff0c\u4f7f\u7528collections<\/code>\u6a21\u5757\u7684\u7c7b\u8fdb\u884c\u5224\u65ad\u662f\u5408\u9002\u7684\u3002<\/li>\n<\/ul>\n
            \u56db\u3001\u6570\u636e\u7c7b\u578b\u7684\u5e38\u89c1\u5e94\u7528\u573a\u666f<\/h3>\n<\/p>\n
            \u5b57\u7b26\u4e32\u548c\u6570\u5b57\u7c7b\u578b\u8f6c\u6362<\/h4>\n<\/p>\n
            \u5728\u8bb8\u591a\u5e94\u7528\u4e2d\uff0c\u5b57\u7b26\u4e32\u548c\u6570\u5b57\u4e4b\u95f4\u7684\u8f6c\u6362\u662f\u5e38\u89c1\u9700\u6c42\u3002Python\u63d0\u4f9b\u4e86\u5185\u7f6e\u7684\u8f6c\u6362\u51fd\u6570\uff0c\u5982int()<\/code>\u3001float()<\/code>\u3001str()<\/code>\u7b49\uff1a<\/p>\n<\/p>\n
            s = "123"<\/p>\n
            num = int(s)<\/p>\n
            print(type(num))  # <class 'int'><\/p>\n
            <\/code><\/pre>\n<\/p>\n
            \u52a8\u6001\u7c7b\u578b\u68c0\u67e5<\/h4>\n<\/p>\n
            \u5728\u67d0\u4e9b\u573a\u666f\u4e0b\uff0c\u7a0b\u5e8f\u9700\u8981\u5bf9\u8f93\u5165\u6570\u636e\u8fdb\u884c\u52a8\u6001\u7c7b\u578b\u68c0\u67e5\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u7684\u6b63\u786e\u6027\u3002<\/p>\n<\/p>\n
            def process_data(data):<\/p>\n
                if isinstance(data, int):<\/p>\n
                    print("Processing an integer")<\/p>\n
                elif isinstance(data, str):<\/p>\n
                    print("Processing a string")<\/p>\n
                else:<\/p>\n
                    print("Unsupported data type")<\/p>\n
            process_data(10)  # Processing an integer<\/p>\n
            process_data("Hello")  # Processing a string<\/p>\n
            <\/code><\/pre>\n<\/p>\n
            \u4e94\u3001\u5982\u4f55\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff1f<\/h3>\n<\/p>\n
            \u5728\u9009\u62e9\u5224\u65ad\u6570\u636e\u7c7b\u578b\u7684\u65b9\u6cd5\u65f6\uff0c\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u548c\u573a\u666f\u8fdb\u884c\u9009\u62e9\uff1a<\/p>\n<\/p>\n
              \n
            • \u7b80\u5355\u7c7b\u578b\u5224\u65ad<\/strong>\uff1a\u5982\u679c\u53ea\u662f\u9700\u8981\u786e\u8ba4\u53d8\u91cf\u7684\u57fa\u672c\u7c7b\u578b\uff0c\u4e14\u4e0d\u6d89\u53ca\u7ee7\u627f\u5173\u7cfb\uff0ctype()<\/code>\u662f\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u3002<\/li>\n
            • \u590d\u6742\u7c7b\u578b\u5224\u65ad<\/strong>\uff1a\u5f53\u6d89\u53ca\u5230\u7ee7\u627f\u5173\u7cfb\u6216\u8005\u9700\u8981\u5bf9\u590d\u6742\u6570\u636e\u7ed3\u6784\u8fdb\u884c\u5224\u65ad\u65f6\uff0cisinstance()<\/code>\u662f\u66f4\u4e3a\u7075\u6d3b\u548c\u5f3a\u5927\u7684\u9009\u62e9\u3002<\/li>\n
            • \u7279\u5b9a\u7ed3\u6784\u7c7b\u578b\u5224\u65ad<\/strong>\uff1a\u5bf9\u4e8e\u7279\u5b9a\u7684\u590d\u6742\u6570\u636e\u7ed3\u6784\uff0c\u53ef\u4ee5\u4f7f\u7528collections<\/code>\u6a21\u5757\u4e2d\u7684\u7c7b\u6765\u8fdb\u884c\u5224\u65ad\u3002<\/li>\n<\/ul>\n
              \u603b\u7ed3\u6765\u8bf4\uff0cPython\u63d0\u4f9b\u4e86\u591a\u79cd\u5224\u65ad\u6570\u636e\u7c7b\u578b\u7684\u65b9\u6cd5\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u4ee5\u786e\u4fdd\u7a0b\u5e8f\u7684\u6b63\u786e\u6027\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n<\/p>\n
              \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
               \u5982\u4f55\u5728Python\u4e2d\u68c0\u67e5\u53d8\u91cf\u7684\u6570\u636e\u7c7b\u578b\uff1f<\/strong>
              \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684type()<\/code>\u51fd\u6570\u6765\u83b7\u53d6\u53d8\u91cf\u7684\u6570\u636e\u7c7b\u578b\u3002\u4f8b\u5982\uff0ctype(variable)<\/code>\u5c06\u8fd4\u56de\u53d8\u91cf\u7684\u7c7b\u578b\u3002\u5bf9\u4e8e\u66f4\u8be6\u7ec6\u7684\u5224\u65ad\uff0c\u53ef\u4ee5\u4f7f\u7528isinstance()<\/code>\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u4e0d\u4ec5\u53ef\u4ee5\u5224\u65ad\u53d8\u91cf\u7684\u7c7b\u578b\uff0c\u8fd8\u80fd\u68c0\u67e5\u5176\u662f\u5426\u5c5e\u4e8e\u67d0\u4e2a\u7279\u5b9a\u7684\u7c7b\u6216\u5143\u7ec4\u4e2d\u7684\u7c7b\u3002<\/p>\n
              Python\u4e2d\u6709\u54ea\u4e9b\u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\uff1f<\/strong>
              Python\u652f\u6301\u591a\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\uff1a\u6574\u6570\uff08int\uff09\u3001\u6d6e\u70b9\u6570\uff08float\uff09\u3001\u5b57\u7b26\u4e32\uff08str\uff09\u3001\u5217\u8868\uff08list\uff09\u3001\u5143\u7ec4\uff08tuple\uff09\u3001\u5b57\u5178\uff08dict\uff09\u3001\u96c6\u5408\uff08set\uff09\u7b49\u3002\u6bcf\u79cd\u7c7b\u578b\u90fd\u6709\u5176\u7279\u5b9a\u7684\u7528\u9014\u548c\u7279\u6027\uff0c\u4e86\u89e3\u8fd9\u4e9b\u7c7b\u578b\u6709\u52a9\u4e8e\u66f4\u6709\u6548\u5730\u4f7f\u7528Python\u8fdb\u884c\u7f16\u7a0b\u3002<\/p>\n
              \u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u662f\u7279\u5b9a\u7c7b\u578b\u7684\u5b9e\u4f8b\uff1f<\/strong>
              \u4f7f\u7528isinstance()<\/code>\u51fd\u6570\u53ef\u4ee5\u8f7b\u677e\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u7279\u5b9a\u6570\u636e\u7c7b\u578b\u7684\u5b9e\u4f8b\u3002\u4f8b\u5982\uff0cisinstance(variable, int)<\/code>\u5c06\u8fd4\u56deTrue<\/code>\u5982\u679c\u53d8\u91cf\u662f\u6574\u6570\u7c7b\u578b\uff0c\u8fd4\u56deFalse<\/code>\u5219\u8868\u793a\u4e0d\u662f\u3002\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u7075\u6d3b\uff0c\u9002\u7528\u4e8e\u68c0\u67e5\u591a\u79cd\u6570\u636e\u7c7b\u578b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u5224\u65ad\u6570\u636e\u7c7b\u578b\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528\u5185\u7f6e\u51fd\u6570type()\u3001isinstance()\u3001\u5229\u7528collect […]","protected":false},"author":3,"featured_media":921612,"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\/921606"}],"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=921606"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/921606\/revisions"}],"predecessor-version":[{"id":921614,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/921606\/revisions\/921614"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/921612"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=921606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=921606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=921606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}