{"id":1133369,"date":"2025-01-08T21:05:49","date_gmt":"2025-01-08T13:05:49","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1133369.html"},"modified":"2025-01-08T21:05:52","modified_gmt":"2025-01-08T13:05:52","slug":"python%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%ad%e4%b8%80%e4%b8%aa%e5%80%bc%e6%98%af%e5%90%a6%e4%b8%ba%e6%95%b4%e6%95%b0-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1133369.html","title":{"rendered":"python\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u503c\u662f\u5426\u4e3a\u6574\u6570"},"content":{"rendered":"

\"python\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u503c\u662f\u5426\u4e3a\u6574\u6570\"<\/p>\n

Python\u5224\u65ad\u4e00\u4e2a\u503c\u662f\u5426\u4e3a\u6574\u6570\u7684\u4e3b\u8981\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528\u5185\u7f6e\u51fd\u6570isinstance()<\/code>\u3001\u4f7f\u7528float.is_integer()<\/code>\u65b9\u6cd5\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u3001try-except<\/code>\u8bed\u53e5\u6355\u83b7\u5f02\u5e38\u3002<\/strong> \u5176\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u5185\u7f6e\u51fd\u6570isinstance()<\/code>\uff0c\u56e0\u4e3a\u5b83\u80fd\u591f\u9ad8\u6548\u4e14\u51c6\u786e\u5730\u5224\u65ad\u4e00\u4e2a\u503c\u662f\u5426\u4e3a\u6574\u6570\u7c7b\u578b\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u5e76\u63a2\u8ba8\u5b83\u4eec\u7684\u4f18\u7f3a\u70b9\u548c\u9002\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528isinstance()<\/code>\u51fd\u6570<\/h3>\n<\/p>\n

\u4f7f\u7528isinstance()<\/code>\u51fd\u6570\u662f\u5224\u65ad\u4e00\u4e2a\u503c\u662f\u5426\u4e3a\u6574\u6570\u7684\u6700\u76f4\u63a5\u4e14\u9ad8\u6548\u7684\u65b9\u6cd5\u3002\u8be5\u51fd\u6570\u7684\u8bed\u6cd5\u4e3aisinstance(object, classinfo)<\/code>\uff0c\u7528\u4e8e\u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u4e3a\u67d0\u4e00\u7279\u5b9a\u7c7b\u578b\u3002<\/p>\n<\/p>\n

value = 5<\/p>\n
if isinstance(value, int):<\/p>\n
    print(f"{value} \u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
else:<\/p>\n
    print(f"{value} \u4e0d\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f18\u70b9\uff1a<\/h4>\n<\/p>\n
    \n
  1. \u9ad8\u6548\u4e14\u7b80\u6d01<\/strong>\uff1a\u4ee3\u7801\u7b80\u6d01\u660e\u4e86\uff0c\u6267\u884c\u6548\u7387\u9ad8\u3002<\/li>\n
  2. \u51c6\u786e<\/strong>\uff1a\u80fd\u591f\u51c6\u786e\u5730\u5224\u65ad\u4e00\u4e2a\u503c\u662f\u5426\u4e3a\u6574\u6570\u7c7b\u578b\u3002<\/li>\n<\/ol>\n
    \u7f3a\u70b9\uff1a<\/h4>\n<\/p>\n
      \n
    1. \u7c7b\u578b\u9650\u5236<\/strong>\uff1a\u53ea\u80fd\u5224\u65ad Python \u5185\u7f6e\u7684\u6574\u6570\u7c7b\u578b\uff0c\u65e0\u6cd5\u5224\u65ad\u5b57\u7b26\u4e32\u5f62\u5f0f\u7684\u6570\u5b57\u3002<\/li>\n<\/ol>\n
      \u4e8c\u3001\u4f7f\u7528float.is_integer()<\/code>\u65b9\u6cd5<\/h3>\n<\/p>\n
      \u5bf9\u4e8e\u6d6e\u70b9\u6570\u7c7b\u578b\u7684\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528float.is_integer()<\/code>\u65b9\u6cd5\u6765\u5224\u65ad\u5176\u662f\u5426\u4e3a\u6574\u6570\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u5e03\u5c14\u503c\uff0c\u8868\u793a\u6d6e\u70b9\u6570\u662f\u5426\u4e3a\u6574\u6570\u3002<\/p>\n<\/p>\n
      value = 5.0<\/p>\n
      if isinstance(value, float) and value.is_integer():<\/p>\n
          print(f"{value} \u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
      else:<\/p>\n
          print(f"{value} \u4e0d\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      \u4f18\u70b9\uff1a<\/h4>\n<\/p>\n
        \n
      1. \u9002\u7528\u4e8e\u6d6e\u70b9\u6570<\/strong>\uff1a\u80fd\u591f\u5224\u65ad\u6d6e\u70b9\u6570\u662f\u5426\u4e3a\u6574\u6570\u3002<\/li>\n
      2. \u7b80\u6d01<\/strong>\uff1a\u4ee3\u7801\u7b80\u6d01\u660e\u4e86\u3002<\/li>\n<\/ol>\n
        \u7f3a\u70b9\uff1a<\/h4>\n<\/p>\n
          \n
        1. \u4ec5\u9002\u7528\u4e8e\u6d6e\u70b9\u6570<\/strong>\uff1a\u53ea\u80fd\u7528\u4e8e\u6d6e\u70b9\u6570\u7c7b\u578b\uff0c\u65e0\u6cd5\u5224\u65ad\u5176\u4ed6\u7c7b\u578b\u3002<\/li>\n<\/ol>\n
          \u4e09\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f<\/h3>\n<\/p>\n
          \u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5224\u65ad\u5b57\u7b26\u4e32\u5f62\u5f0f\u7684\u503c\u662f\u5426\u4e3a\u6574\u6570\u3002\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u5f3a\u5927\u4e14\u7075\u6d3b\uff0c\u80fd\u591f\u5904\u7406\u590d\u6742\u7684\u5b57\u7b26\u4e32\u5339\u914d\u3002<\/p>\n<\/p>\n
          import re<\/p>\n
          value = "123"<\/p>\n
          if re.match(r"^-?\\d+$", value):<\/p>\n
              print(f"{value} \u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
          else:<\/p>\n
              print(f"{value} \u4e0d\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u4f18\u70b9\uff1a<\/h4>\n<\/p>\n
            \n
          1. \u7075\u6d3b<\/strong>\uff1a\u80fd\u591f\u5904\u7406\u5b57\u7b26\u4e32\u5f62\u5f0f\u7684\u6570\u5b57\u3002<\/li>\n
          2. \u5f3a\u5927<\/strong>\uff1a\u53ef\u4ee5\u5904\u7406\u590d\u6742\u7684\u5b57\u7b26\u4e32\u5339\u914d\u3002<\/li>\n<\/ol>\n
            \u7f3a\u70b9\uff1a<\/h4>\n<\/p>\n
              \n
            1. \u590d\u6742\u5ea6\u9ad8<\/strong>\uff1a\u4ee3\u7801\u76f8\u5bf9\u590d\u6742\uff0c\u4e0d\u9002\u5408\u521d\u5b66\u8005\u3002<\/li>\n
            2. \u6027\u80fd\u8f83\u4f4e<\/strong>\uff1a\u6267\u884c\u6548\u7387\u76f8\u5bf9\u8f83\u4f4e\u3002<\/li>\n<\/ol>\n
              \u56db\u3001\u4f7f\u7528try-except<\/code>\u8bed\u53e5\u6355\u83b7\u5f02\u5e38<\/h3>\n<\/p>\n
              \u901a\u8fc7\u5c06\u503c\u8f6c\u6362\u4e3a\u6574\u6570\u7c7b\u578b\uff0c\u5e76\u4f7f\u7528try-except<\/code>\u8bed\u53e5\u6355\u83b7\u53ef\u80fd\u7684\u5f02\u5e38\uff0c\u53ef\u4ee5\u5224\u65ad\u4e00\u4e2a\u503c\u662f\u5426\u4e3a\u6574\u6570\u3002<\/p>\n<\/p>\n
              value = "123"<\/p>\n
              try:<\/p>\n
                  int_value = int(value)<\/p>\n
                  print(f"{value} \u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
              except ValueError:<\/p>\n
                  print(f"{value} \u4e0d\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
              <\/code><\/pre>\n<\/p>\n
              \u4f18\u70b9\uff1a<\/h4>\n<\/p>\n
                \n
              1. \u9002\u7528\u8303\u56f4\u5e7f<\/strong>\uff1a\u80fd\u591f\u5904\u7406\u5b57\u7b26\u4e32\u3001\u6d6e\u70b9\u6570\u7b49\u591a\u79cd\u7c7b\u578b\u3002<\/li>\n
              2. \u7b80\u5355<\/strong>\uff1a\u4ee3\u7801\u76f8\u5bf9\u7b80\u5355\u6613\u61c2\u3002<\/li>\n<\/ol>\n
                \u7f3a\u70b9\uff1a<\/h4>\n<\/p>\n
                  \n
                1. \u6027\u80fd\u8f83\u4f4e<\/strong>\uff1a\u6355\u83b7\u5f02\u5e38\u7684\u6027\u80fd\u8f83\u4f4e\u3002<\/li>\n
                2. \u4ee3\u7801\u5197\u957f<\/strong>\uff1a\u76f8\u5bf9\u4e8e\u5176\u4ed6\u65b9\u6cd5\uff0c\u4ee3\u7801\u8f83\u4e3a\u5197\u957f\u3002<\/li>\n<\/ol>\n
                  \u4e94\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
                  \u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u9700\u6c42\u548c\u573a\u666f\u3002\u5982\u679c\u9700\u8981\u5224\u65ad\u7684\u503c\u662f\u5185\u7f6e\u6574\u6570\u7c7b\u578b\uff0c\u63a8\u8350\u4f7f\u7528isinstance()<\/code>\u51fd\u6570\uff0c\u56e0\u4e3a\u5b83\u9ad8\u6548\u4e14\u7b80\u6d01\u3002\u5982\u679c\u9700\u8981\u5224\u65ad\u6d6e\u70b9\u6570\u662f\u5426\u4e3a\u6574\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528float.is_integer()<\/code>\u65b9\u6cd5\u3002\u5982\u679c\u9700\u8981\u5904\u7406\u5b57\u7b26\u4e32\u5f62\u5f0f\u7684\u6570\u5b57\uff0c\u53ef\u4ee5\u9009\u62e9\u6b63\u5219\u8868\u8fbe\u5f0f\u6216try-except<\/code>\u8bed\u53e5\u3002<\/p>\n<\/p>\n
                  \u516d\u3001\u6df1\u5165\u63a2\u8ba8\u4e0e\u793a\u4f8b<\/h3>\n<\/p>\n
                  \u4e3a\u4e86\u66f4\u6df1\u5165\u5730\u7406\u89e3\u8fd9\u4e9b\u65b9\u6cd5\u7684\u5e94\u7528\u573a\u666f\u548c\u5b9e\u73b0\u7ec6\u8282\uff0c\u4e0b\u9762\u5c06\u901a\u8fc7\u51e0\u4e2a\u5177\u4f53\u7684\u793a\u4f8b\u6765\u5c55\u793a\u5b83\u4eec\u7684\u4f7f\u7528\u3002<\/p>\n<\/p>\n
                  \u793a\u4f8b1\uff1a\u5224\u65ad\u7528\u6237\u8f93\u5165\u662f\u5426\u4e3a\u6574\u6570<\/h4>\n<\/p>\n
                  \u5728\u5f00\u53d1\u7528\u6237\u4ea4\u4e92\u7684\u5e94\u7528\u7a0b\u5e8f\u65f6\uff0c\u5224\u65ad\u7528\u6237\u8f93\u5165\u662f\u5426\u4e3a\u6574\u6570\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u9700\u6c42\u3002\u53ef\u4ee5\u4f7f\u7528try-except<\/code>\u8bed\u53e5\u6765\u5904\u7406\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n<\/p>\n
                  user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u503c\uff1a")<\/p>\n
                  try:<\/p>\n
                      int_value = int(user_input)<\/p>\n
                      print(f"\u7528\u6237\u8f93\u5165\u7684 {user_input} \u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
                  except ValueError:<\/p>\n
                      print(f"\u7528\u6237\u8f93\u5165\u7684 {user_input} \u4e0d\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
                  <\/code><\/pre>\n<\/p>\n
                  \u793a\u4f8b2\uff1a\u5904\u7406\u6d6e\u70b9\u6570\u5217\u8868<\/h4>\n<\/p>\n
                  \u5728\u5904\u7406\u5305\u542b\u6d6e\u70b9\u6570\u7684\u5217\u8868\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528float.is_integer()<\/code>\u65b9\u6cd5\u6765\u7b5b\u9009\u51fa\u6574\u6570\u3002<\/p>\n<\/p>\n
                  values = [1.0, 2.5, 3.0, 4.1, 5.0]<\/p>\n
                  integers = [value for value in values if value.is_integer()]<\/p>\n
                  print(f"\u6d6e\u70b9\u6570\u5217\u8868\u4e2d\u7684\u6574\u6570\u6709\uff1a{integers}")<\/p>\n
                  <\/code><\/pre>\n<\/p>\n
                  \u793a\u4f8b3\uff1a\u9a8c\u8bc1\u5b57\u7b26\u4e32\u683c\u5f0f<\/h4>\n<\/p>\n
                  \u5728\u5904\u7406\u7528\u6237\u63d0\u4f9b\u7684\u5b57\u7b26\u4e32\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u9a8c\u8bc1\u5176\u662f\u5426\u4e3a\u6574\u6570\u683c\u5f0f\u3002<\/p>\n<\/p>\n
                  import re<\/p>\n
                  user_input = "123"<\/p>\n
                  if re.match(r"^-?\\d+$", user_input):<\/p>\n
                      print(f"\u5b57\u7b26\u4e32 {user_input} \u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
                  else:<\/p>\n
                      print(f"\u5b57\u7b26\u4e32 {user_input} \u4e0d\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
                  <\/code><\/pre>\n<\/p>\n
                  \u901a\u8fc7\u8fd9\u4e9b\u793a\u4f8b\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3\u4e0d\u540c\u65b9\u6cd5\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u4f18\u7f3a\u70b9\u548c\u9002\u7528\u573a\u666f\u3002\u65e0\u8bba\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\uff0c\u90fd\u5e94\u6839\u636e\u5177\u4f53\u9700\u6c42\u548c\u573a\u666f\u6765\u7075\u6d3b\u5e94\u7528\uff0c\u4ee5\u8fbe\u5230\u6700\u4f73\u6548\u679c\u3002<\/p>\n<\/p>\n
                  \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
                   \u5982\u4f55\u5728Python\u4e2d\u68c0\u67e5\u4e00\u4e2a\u503c\u7684\u7c7b\u578b\uff1f<\/strong>
                  \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684type()<\/code>\u51fd\u6570\u6765\u68c0\u67e5\u4e00\u4e2a\u503c\u7684\u7c7b\u578b\u3002\u4f8b\u5982\uff0c\u901a\u8fc7type(value) == int<\/code>\u53ef\u4ee5\u5224\u65advalue<\/code>\u662f\u5426\u4e3a\u6574\u6570\u3002\u6b64\u5916\uff0c\u4f7f\u7528isinstance(value, int)<\/code>\u4e5f\u662f\u4e00\u79cd\u63a8\u8350\u7684\u65b9\u6cd5\uff0c\u5b83\u4e0d\u4ec5\u53ef\u4ee5\u68c0\u67e5\u503c\u7684\u7c7b\u578b\uff0c\u8fd8\u80fd\u8003\u8651\u5230\u5b50\u7c7b\u7684\u60c5\u51b5\u3002<\/p>\n
                  Python\u4e2d\u5982\u4f55\u5904\u7406\u975e\u6574\u6570\u7c7b\u578b\u7684\u503c\uff1f<\/strong>
                  \u5f53\u4f60\u9700\u8981\u5904\u7406\u975e\u6574\u6570\u7c7b\u578b\u7684\u503c\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u673a\u5236\u6765\u6355\u83b7\u9519\u8bef\u3002\u4f8b\u5982\uff0c\u5c1d\u8bd5\u5c06\u4e00\u4e2a\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6574\u6570\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528try<\/code>\u548cexcept<\/code>\u8bed\u53e5\u6765\u907f\u514d\u7a0b\u5e8f\u5d29\u6e83\u3002\u8fd9\u6837\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u7ba1\u7406\u8f93\u5165\u6570\u636e\uff0c\u5e76\u786e\u4fdd\u5b83\u4eec\u7b26\u5408\u9884\u671f\u683c\u5f0f\u3002<\/p>\n
                  \u5728Python\u4e2d\u5982\u4f55\u5224\u65ad\u6d6e\u70b9\u6570\u662f\u5426\u53ef\u4ee5\u8f6c\u5316\u4e3a\u6574\u6570\uff1f<\/strong>
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