{"id":1075974,"date":"2025-01-08T11:49:11","date_gmt":"2025-01-08T03:49:11","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1075974.html"},"modified":"2025-01-08T11:49:14","modified_gmt":"2025-01-08T03:49:14","slug":"python%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%ad%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%83%bd%e6%98%af%e6%95%b0%e5%ad%97-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1075974.html","title":{"rendered":"python\u5982\u4f55\u5224\u65ad\u5b57\u7b26\u4e32\u90fd\u662f\u6570\u5b57"},"content":{"rendered":"

\"python\u5982\u4f55\u5224\u65ad\u5b57\u7b26\u4e32\u90fd\u662f\u6570\u5b57\"<\/p>\n

Python\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u90fd\u662f\u6570\u5b57\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u5305\u62ec\u4f7f\u7528str.isdigit()<\/code>\u65b9\u6cd5\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u3001\u4f7f\u7528str.isdecimal()<\/code>\u548cstr.isnumeric()<\/code>\u65b9\u6cd5\u3002<\/strong> \u5176\u4e2d\uff0c\u6700\u5e38\u7528\u548c\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u4f7f\u7528str.isdigit()<\/code>\u65b9\u6cd5\u3002\u63a5\u4e0b\u6765\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\u5e76\u8ba8\u8bba\u5b83\u4eec\u7684\u4f18\u7f3a\u70b9\u3002<\/p>\n<\/p>\n

\u4e00\u3001str.isdigit()\u65b9\u6cd5<\/p>\n<\/p>\n

str.isdigit()<\/code>\u662f\u4e00\u4e2a\u5185\u7f6e\u7684\u5b57\u7b26\u4e32\u65b9\u6cd5\uff0c\u7528\u4e8e\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u5b57\u7b26\u662f\u5426\u90fd\u662f\u6570\u5b57\u5b57\u7b26\u3002\u5982\u679c\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u5b57\u7b26\u90fd\u662f\u6570\u5b57\u5b57\u7b26\uff0c\u5219\u8fd4\u56deTrue\uff0c\u5426\u5219\u8fd4\u56deFalse\u3002\u8fd9\u4e2a\u65b9\u6cd5\u6700\u5e38\u7528\uff0c\u56e0\u4e3a\u5b83\u7b80\u5355\u6613\u7528\u3002<\/p>\n<\/p>\n

# \u793a\u4f8b\u4ee3\u7801<\/p>\n
s = "12345"<\/p>\n
print(s.isdigit())  # \u8f93\u51fa: True<\/p>\n
s = "123a5"<\/p>\n
print(s.isdigit())  # \u8f93\u51fa: False<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n
    \n
  • \u7b80\u5355\u6613\u7528\uff0c\u4ee3\u7801\u7b80\u6d01\u3002<\/li>\n
  • \u80fd\u591f\u5904\u7406\u57fa\u672c\u7684\u6570\u5b57\u5b57\u7b26\u3002<\/li>\n<\/ul>\n
    \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n
      \n
    • \u4e0d\u80fd\u5904\u7406\u5305\u542b\u5c0f\u6570\u70b9\u3001\u8d1f\u53f7\u7b49\u7684\u6570\u5b57\u3002<\/li>\n<\/ul>\n
      \u4e8c\u3001\u6b63\u5219\u8868\u8fbe\u5f0f<\/p>\n<\/p>\n
      \u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u7075\u6d3b\u5730\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u7531\u6570\u5b57\u7ec4\u6210\u3002\u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5b57\u7b26\u4e32\u5339\u914d\u529f\u80fd\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u5b9a\u4e49\u590d\u6742\u7684\u5339\u914d\u89c4\u5219\u3002<\/p>\n<\/p>\n
      import re<\/p>\n
      \u793a\u4f8b\u4ee3\u7801<\/strong><\/h2>\n
      s = "12345"<\/p>\n
      pattern = re.compile(r'^\\d+$')<\/p>\n
      print(bool(pattern.match(s)))  # \u8f93\u51fa: True<\/p>\n
      s = "123a5"<\/p>\n
      print(bool(pattern.match(s)))  # \u8f93\u51fa: False<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n
        \n
      • \u80fd\u591f\u5904\u7406\u66f4\u590d\u6742\u7684\u60c5\u51b5\uff0c\u4f8b\u5982\u53ef\u4ee5\u5339\u914d\u8d1f\u6570\u3001\u5c0f\u6570\u7b49\u3002<\/li>\n
      • \u7075\u6d3b\u6027\u9ad8\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u81ea\u5b9a\u4e49\u5339\u914d\u89c4\u5219\u3002<\/li>\n<\/ul>\n
        \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n
          \n
        • \u4ee3\u7801\u76f8\u5bf9\u590d\u6742\uff0c\u9700\u8981\u4e00\u5b9a\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u77e5\u8bc6\u3002<\/li>\n
        • \u53ef\u8bfb\u6027\u8f83\u4f4e\uff0c\u4e0d\u5982str.isdigit()<\/code>\u65b9\u6cd5\u76f4\u89c2\u3002<\/li>\n<\/ul>\n
          \u4e09\u3001str.isdecimal()\u65b9\u6cd5<\/p>\n<\/p>\n
          str.isdecimal()<\/code>\u65b9\u6cd5\u7c7b\u4f3c\u4e8estr.isdigit()<\/code>\u65b9\u6cd5\uff0c\u7528\u4e8e\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u5b57\u7b26\u662f\u5426\u90fd\u662f\u5341\u8fdb\u5236\u5b57\u7b26\u3002\u8fd9\u4e2a\u65b9\u6cd5\u901a\u5e38\u7528\u4e8e\u5904\u7406\u5341\u8fdb\u5236\u6570\u5b57\u5b57\u7b26\u3002<\/p>\n<\/p>\n
          # \u793a\u4f8b\u4ee3\u7801<\/p>\n
          s = "12345"<\/p>\n
          print(s.isdecimal())  # \u8f93\u51fa: True<\/p>\n
          s = "123a5"<\/p>\n
          print(s.isdecimal())  # \u8f93\u51fa: False<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n
            \n
          • \u7b80\u5355\u6613\u7528\uff0c\u4ee3\u7801\u7b80\u6d01\u3002<\/li>\n
          • \u80fd\u591f\u5904\u7406\u57fa\u672c\u7684\u5341\u8fdb\u5236\u6570\u5b57\u5b57\u7b26\u3002<\/li>\n<\/ul>\n
            \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n
              \n
            • \u4e0d\u80fd\u5904\u7406\u5305\u542b\u5c0f\u6570\u70b9\u3001\u8d1f\u53f7\u7b49\u7684\u6570\u5b57\u3002<\/li>\n<\/ul>\n
              \u56db\u3001str.isnumeric()\u65b9\u6cd5<\/p>\n<\/p>\n
              str.isnumeric()<\/code>\u65b9\u6cd5\u7528\u4e8e\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u5b57\u7b26\u662f\u5426\u90fd\u662f\u6570\u5b57\u5b57\u7b26\uff0c\u5305\u62ec\u7f57\u9a6c\u6570\u5b57\u3001\u5206\u6570\u7b49\u3002\u8fd9\u4e2a\u65b9\u6cd5\u6bd4str.isdigit()<\/code>\u548cstr.isdecimal()<\/code>\u65b9\u6cd5\u66f4\u5e7f\u6cdb\u3002<\/p>\n<\/p>\n
              # \u793a\u4f8b\u4ee3\u7801<\/p>\n
              s = "12345"<\/p>\n
              print(s.isnumeric())  # \u8f93\u51fa: True<\/p>\n
              s = "123a5"<\/p>\n
              print(s.isnumeric())  # \u8f93\u51fa: False<\/p>\n
              s = "\u2163"<\/p>\n
              print(s.isnumeric())  # \u8f93\u51fa: True<\/p>\n
              <\/code><\/pre>\n<\/p>\n
              \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n
                \n
              • \u80fd\u591f\u5904\u7406\u66f4\u591a\u7c7b\u578b\u7684\u6570\u5b57\u5b57\u7b26\uff0c\u4f8b\u5982\u7f57\u9a6c\u6570\u5b57\u3001\u5206\u6570\u7b49\u3002<\/li>\n
              • \u6bd4str.isdigit()<\/code>\u548cstr.isdecimal()<\/code>\u65b9\u6cd5\u66f4\u5e7f\u6cdb\u3002<\/li>\n<\/ul>\n
                \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n
                  \n
                • \u4e0d\u80fd\u5904\u7406\u5305\u542b\u5c0f\u6570\u70b9\u3001\u8d1f\u53f7\u7b49\u7684\u6570\u5b57\u3002<\/li>\n<\/ul>\n
                  \u4e94\u3001\u5176\u4ed6\u65b9\u6cd5<\/p>\n<\/p>\n
                  \u9664\u4e86\u4e0a\u8ff0\u65b9\u6cd5\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u5176\u4ed6\u65b9\u6cd5\u6765\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u7531\u6570\u5b57\u7ec4\u6210\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6574\u6570\u6216\u6d6e\u70b9\u6570\uff0c\u5982\u679c\u8f6c\u6362\u6210\u529f\u5219\u8bf4\u660e\u5b57\u7b26\u4e32\u662f\u6570\u5b57\u3002<\/p>\n<\/p>\n
                  # \u793a\u4f8b\u4ee3\u7801<\/p>\n
                  s = "12345"<\/p>\n
                  try:<\/p>\n
                      int(s)<\/p>\n
                      is_number = True<\/p>\n
                  except ValueError:<\/p>\n
                      is_number = False<\/p>\n
                  print(is_number)  # \u8f93\u51fa: True<\/p>\n
                  s = "123a5"<\/p>\n
                  try:<\/p>\n
                      int(s)<\/p>\n
                      is_number = False<\/p>\n
                  except ValueError:<\/p>\n
                      is_number = False<\/p>\n
                  print(is_number)  # \u8f93\u51fa: False<\/p>\n
                  <\/code><\/pre>\n<\/p>\n
                  \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n
                    \n
                  • \u80fd\u591f\u5904\u7406\u66f4\u590d\u6742\u7684\u60c5\u51b5\uff0c\u4f8b\u5982\u5c0f\u6570\u3001\u8d1f\u6570\u7b49\u3002<\/li>\n
                  • \u7075\u6d3b\u6027\u9ad8\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u81ea\u5b9a\u4e49\u5904\u7406\u903b\u8f91\u3002<\/li>\n<\/ul>\n
                    \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n
                      \n
                    • \u4ee3\u7801\u76f8\u5bf9\u590d\u6742\uff0c\u4e0d\u5982str.isdigit()<\/code>\u65b9\u6cd5\u7b80\u6d01\u3002<\/li>\n
                    • \u53ef\u8bfb\u6027\u8f83\u4f4e\uff0c\u4e0d\u5982str.isdigit()<\/code>\u65b9\u6cd5\u76f4\u89c2\u3002<\/li>\n<\/ul>\n
                      \u603b\u7ed3<\/p>\n<\/p>\n
                      \u5728Python\u4e2d\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u90fd\u662f\u6570\u5b57\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u5305\u62ec\u4f7f\u7528str.isdigit()<\/code>\u65b9\u6cd5\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u3001str.isdecimal()<\/code>\u65b9\u6cd5\u3001str.isnumeric()<\/code>\u65b9\u6cd5\u7b49\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u4f18\u7f3a\u70b9\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n
                      \u5982\u679c\u53ea\u662f\u9700\u8981\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u662f\u5426\u90fd\u662f\u57fa\u672c\u7684\u6570\u5b57\u5b57\u7b26\uff0cstr.isdigit()<\/code>\u65b9\u6cd5\u662f\u6700\u7b80\u5355\u548c\u5e38\u7528\u7684\u65b9\u6cd5\u3002<\/strong> \u5982\u679c\u9700\u8981\u5904\u7406\u66f4\u590d\u6742\u7684\u60c5\u51b5\uff0c\u4f8b\u5982\u5c0f\u6570\u3001\u8d1f\u6570\u7b49\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6216\u5c1d\u8bd5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6570\u5b57\u7684\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
                      \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
                       \u5982\u4f55\u4f7f\u7528Python\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u5305\u542b\u6570\u5b57\uff1f<\/strong>
                      \u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u7684isdigit()<\/code>\u65b9\u6cd5\u6765\u5224\u65ad\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u5b8c\u5168\u7531\u6570\u5b57\u7ec4\u6210\u3002\u5982\u679c\u5b57\u7b26\u4e32\u4e2d\u53ea\u5305\u542b\u6570\u5b57\u5b57\u7b26\uff0cisdigit()<\/code>\u5c06\u8fd4\u56deTrue<\/code>\uff0c\u5426\u5219\u8fd4\u56deFalse<\/code>\u3002\u4f8b\u5982\uff1a  <\/p>\n
                      string = "12345"\nprint(string.isdigit())  # \u8f93\u51fa: True\n<\/code><\/pre>\n
                      \u5728Python\u4e2d\u5982\u4f55\u5904\u7406\u5305\u542b\u7a7a\u683c\u6216\u7279\u6b8a\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\uff1f<\/strong>
                      \u5982\u679c\u5b57\u7b26\u4e32\u53ef\u80fd\u5305\u542b\u7a7a\u683c\u6216\u7279\u6b8a\u5b57\u7b26\uff0c\u53ef\u4ee5\u5728\u4f7f\u7528isdigit()<\/code>\u65b9\u6cd5\u4e4b\u524d\uff0c\u5148\u4f7f\u7528strip()<\/code>\u65b9\u6cd5\u79fb\u9664\u5f00\u5934\u548c\u7ed3\u5c3e\u7684\u7a7a\u683c\u3002\u5bf9\u4e8e\u7279\u6b8a\u5b57\u7b26\uff0c\u9700\u8981\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u8fdb\u884c\u66f4\u590d\u6742\u7684\u5224\u65ad\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n
                      import re\n\nstring = " 12345 "\ncleaned_string = string.strip()\nprint(cleaned_string.isdigit())  # \u8f93\u51fa: True\n\n# \u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\ndef is_numeric(s):\n    return bool(re.match(r'^\\d+$', s))\n\nprint(is_numeric("12345"))  # \u8f93\u51fa: True\nprint(is_numeric("123a45"))  # \u8f93\u51fa: False\n<\/code><\/pre>\n
                      \u5728Python\u4e2d\u5982\u4f55\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u6d6e\u70b9\u6570\uff1f<\/strong>
                      \u5982\u679c\u9700\u8981\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u6d6e\u70b9\u6570\uff0cisdigit()<\/code>\u65b9\u6cd5\u4e0d\u9002\u7528\uff0c\u56e0\u4e3a\u5b83\u53ea\u68c0\u6d4b\u6574\u6570\u3002\u53ef\u4ee5\u4f7f\u7528try...except<\/code>\u7ed3\u6784\u5c1d\u8bd5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3afloat<\/code>\uff0c\u5982\u679c\u6210\u529f\u5219\u8bf4\u660e\u5b57\u7b26\u4e32\u662f\u4e00\u4e2a\u6709\u6548\u7684\u6d6e\u70b9\u6570\u3002\u4f8b\u5982\uff1a  <\/p>\n
                      def is_float(s):\n    try:\n        float(s)\n        return True\n    except ValueError:\n        return False\n\nprint(is_float("123.45"))  # \u8f93\u51fa: True\nprint(is_float("123.45a"))  # \u8f93\u51fa: False\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"Python\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u90fd\u662f\u6570\u5b57\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u5305\u62ec\u4f7f\u7528str.isdigit()\u65b9\u6cd5\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u3001\u4f7f\u7528s […]","protected":false},"author":3,"featured_media":1075987,"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\/1075974"}],"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=1075974"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1075974\/revisions"}],"predecessor-version":[{"id":1075989,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1075974\/revisions\/1075989"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1075987"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1075974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1075974"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1075974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}