{"id":1097998,"date":"2025-01-08T15:17:09","date_gmt":"2025-01-08T07:17:09","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1097998.html"},"modified":"2025-01-08T15:17:11","modified_gmt":"2025-01-08T07:17:11","slug":"python%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%ad%e8%be%93%e5%85%a5%e7%9a%84%e6%98%af%e5%90%a6%e4%b8%ba%e6%95%b0%e5%ad%97-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1097998.html","title":{"rendered":"python\u5982\u4f55\u5224\u65ad\u8f93\u5165\u7684\u662f\u5426\u4e3a\u6570\u5b57"},"content":{"rendered":"

\"python\u5982\u4f55\u5224\u65ad\u8f93\u5165\u7684\u662f\u5426\u4e3a\u6570\u5b57\"<\/p>\n

\u5f00\u5934\u6bb5\u843d: \u5728Python\u4e2d\u5224\u65ad\u8f93\u5165\u662f\u5426\u4e3a\u6570\u5b57\uff0c\u53ef\u4ee5\u4f7f\u7528isdigit()\u65b9\u6cd5\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u3001try-except\u5757\u3001isnumeric()\u65b9\u6cd5<\/strong>\u3002\u8fd9\u4e9b\u65b9\u6cd5\u5404\u6709\u4f18\u7f3a\u70b9\uff0c\u6839\u636e\u5177\u4f53\u60c5\u51b5\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u5c24\u4e3a\u91cd\u8981\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u51e0\u79cd\u65b9\u6cd5\u7684\u7528\u6cd5\u53ca\u5176\u9002\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n

\u4e00\u3001isdigit()\u65b9\u6cd5<\/p>\n<\/p>\n

isdigit()\u65b9\u6cd5\u662fPython\u5b57\u7b26\u4e32\u65b9\u6cd5\u4e4b\u4e00\uff0c\u7528\u4e8e\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u5b57\u7b26\u662f\u5426\u90fd\u662f\u6570\u5b57\u5b57\u7b26\u3002\u8fd9\u662f\u4e00\u4e2a\u7b80\u5355\u4e14\u5e38\u7528\u7684\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5224\u65ad\u975e\u8d1f\u6574\u6570\u3002\u8be5\u65b9\u6cd5\u7684\u4f18\u70b9\u662f\u4f7f\u7528\u7b80\u5355\uff0c\u7f3a\u70b9\u662f\u4e0d\u652f\u6301\u8d1f\u6570\u548c\u5c0f\u6570\u3002<\/p>\n<\/p>\n

user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u503c: ")<\/p>\n
if user_input.isdigit():<\/p>\n
    print("\u8f93\u5165\u7684\u662f\u6570\u5b57")<\/p>\n
else:<\/p>\n
    print("\u8f93\u5165\u7684\u4e0d\u662f\u6570\u5b57")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528isdigit()\u65b9\u6cd5\u53ef\u4ee5\u5224\u65ad\u7528\u6237\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u662f\u5426\u5168\u90e8\u7531\u6570\u5b57\u5b57\u7b26\u7ec4\u6210\u3002\u5982\u679c\u662f\uff0c\u5219\u8fd4\u56deTrue\uff0c\u5426\u5219\u8fd4\u56deFalse\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u6b63\u5219\u8868\u8fbe\u5f0f<\/p>\n<\/p>\n
\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5b57\u7b26\u4e32\u5339\u914d\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u4e8e\u66f4\u52a0\u590d\u6742\u7684\u5339\u914d\u9700\u6c42\u3002\u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\u5224\u65ad\u8f93\u5165\u662f\u5426\u4e3a\u6574\u6570\u3001\u6d6e\u70b9\u6570\u6216\u8d1f\u6570\u3002<\/p>\n<\/p>\n
import re<\/p>\n
user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u503c: ")<\/p>\n
if re.match(r'^-?\\d+(\\.\\d+)?$', user_input):<\/p>\n
    print("\u8f93\u5165\u7684\u662f\u6570\u5b57")<\/p>\n
else:<\/p>\n
    print("\u8f93\u5165\u7684\u4e0d\u662f\u6570\u5b57")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f^-?\\d+(\\.\\d+)?$<\/code>\u6765\u5339\u914d\u7528\u6237\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u6570\u5b57\u3002\u8fd9\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5339\u914d\u6574\u6570\u3001\u8d1f\u6570\u548c\u6d6e\u70b9\u6570\u3002\u901a\u8fc7re\u6a21\u5757\u7684match()\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5224\u65ad\u8f93\u5165\u662f\u5426\u7b26\u5408\u8be5\u6b63\u5219\u8868\u8fbe\u5f0f\u3002<\/p>\n<\/p>\n
\u4e09\u3001try-except\u5757<\/p>\n<\/p>\n
try-except\u5757\u662fPython\u5f02\u5e38\u5904\u7406\u673a\u5236\u7684\u4e00\u90e8\u5206\uff0c\u53ef\u4ee5\u7528\u4e8e\u6355\u83b7\u548c\u5904\u7406\u5f02\u5e38\u3002\u901a\u8fc7\u5c06\u7528\u6237\u8f93\u5165\u8f6c\u6362\u4e3a\u6570\u5b57\u7c7b\u578b\uff0c\u53ef\u4ee5\u5224\u65ad\u8f93\u5165\u662f\u5426\u4e3a\u6709\u6548\u7684\u6570\u5b57\u3002<\/p>\n<\/p>\n
user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u503c: ")<\/p>\n
try:<\/p>\n
    float(user_input)<\/p>\n
    print("\u8f93\u5165\u7684\u662f\u6570\u5b57")<\/p>\n
except ValueError:<\/p>\n
    print("\u8f93\u5165\u7684\u4e0d\u662f\u6570\u5b57")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u901a\u8fc7\u5c06\u7528\u6237\u8f93\u5165\u8f6c\u6362\u4e3a\u6d6e\u70b9\u6570\u7c7b\u578b\uff0c\u5982\u679c\u8f6c\u6362\u6210\u529f\uff0c\u5219\u8bf4\u660e\u8f93\u5165\u7684\u662f\u6570\u5b57\uff1b\u5982\u679c\u629b\u51faValueError\u5f02\u5e38\uff0c\u5219\u8bf4\u660e\u8f93\u5165\u7684\u4e0d\u662f\u6570\u5b57\u3002try-except\u5757\u7684\u4f18\u70b9\u662f\u53ef\u4ee5\u5904\u7406\u6240\u6709\u7c7b\u578b\u7684\u6570\u5b57\uff0c\u5305\u62ec\u6574\u6570\u3001\u8d1f\u6570\u548c\u6d6e\u70b9\u6570\u3002<\/p>\n<\/p>\n
\u56db\u3001isnumeric()\u65b9\u6cd5<\/p>\n<\/p>\n
isnumeric()\u65b9\u6cd5\u662fPython\u5b57\u7b26\u4e32\u65b9\u6cd5\u4e4b\u4e00\uff0c\u7528\u4e8e\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u5b57\u7b26\u662f\u5426\u90fd\u662f\u6570\u5b57\u5b57\u7b26\u6216Unicode\u6570\u5b57\u5b57\u7b26\u3002\u8be5\u65b9\u6cd5\u7684\u4f18\u70b9\u662f\u53ef\u4ee5\u5904\u7406\u66f4\u591a\u7c7b\u578b\u7684\u6570\u5b57\u5b57\u7b26\uff0c\u7f3a\u70b9\u662f\u4e0eisdigit()\u65b9\u6cd5\u7c7b\u4f3c\uff0c\u4e0d\u652f\u6301\u8d1f\u6570\u548c\u5c0f\u6570\u3002<\/p>\n<\/p>\n
user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u503c: ")<\/p>\n
if user_input.isnumeric():<\/p>\n
    print("\u8f93\u5165\u7684\u662f\u6570\u5b57")<\/p>\n
else:<\/p>\n
    print("\u8f93\u5165\u7684\u4e0d\u662f\u6570\u5b57")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528isnumeric()\u65b9\u6cd5\u53ef\u4ee5\u5224\u65ad\u7528\u6237\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u662f\u5426\u5168\u90e8\u7531\u6570\u5b57\u5b57\u7b26\u6216Unicode\u6570\u5b57\u5b57\u7b26\u7ec4\u6210\u3002\u5982\u679c\u662f\uff0c\u5219\u8fd4\u56deTrue\uff0c\u5426\u5219\u8fd4\u56deFalse\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u603b\u7ed3<\/p>\n<\/p>\n
\u5728Python\u4e2d\u5224\u65ad\u8f93\u5165\u662f\u5426\u4e3a\u6570\u5b57\u7684\u65b9\u6cd5\u6709\u5f88\u591a\uff0c\u5e38\u7528\u7684\u6709isdigit()\u65b9\u6cd5\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u3001try-except\u5757\u548cisnumeric()\u65b9\u6cd5\u3002\u6839\u636e\u5177\u4f53\u60c5\u51b5\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u5c24\u4e3a\u91cd\u8981\u3002isdigit()\u65b9\u6cd5\u548cisnumeric()\u65b9\u6cd5\u9002\u7528\u4e8e\u5224\u65ad\u975e\u8d1f\u6574\u6570\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u9002\u7528\u4e8e\u66f4\u52a0\u590d\u6742\u7684\u5339\u914d\u9700\u6c42\uff0ctry-except\u5757\u9002\u7528\u4e8e\u5904\u7406\u6240\u6709\u7c7b\u578b\u7684\u6570\u5b57\u3002\u901a\u8fc7\u4ee5\u4e0a\u51e0\u79cd\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8f7b\u677e\u5224\u65ad\u7528\u6237\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u6570\u5b57\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u68c0\u67e5\u7528\u6237\u8f93\u5165\u7684\u6570\u636e\u7c7b\u578b\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u51fd\u6570isinstance()<\/code>\u6765\u68c0\u67e5\u8f93\u5165\u6570\u636e\u662f\u5426\u4e3a\u7279\u5b9a\u7c7b\u578b\uff0c\u4f8b\u5982int<\/code>\u6216float<\/code>\u3002\u5bf9\u4e8e\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u8f93\u5165\uff0c\u53ef\u4ee5\u901a\u8fc7\u5c1d\u8bd5\u5c06\u5176\u8f6c\u6362\u4e3a\u6570\u5b57\u6765\u5224\u65ad\u3002\u53ef\u4ee5\u4f7f\u7528try-except<\/code>\u5757\u6765\u5904\u7406\u8f6c\u6362\u8fc7\u7a0b\u4e2d\u7684\u6f5c\u5728\u9519\u8bef\uff0c\u4ece\u800c\u6709\u6548\u5730\u5224\u65ad\u8f93\u5165\u662f\u5426\u4e3a\u6570\u5b57\u3002<\/p>\n
\u5982\u679c\u8f93\u5165\u5305\u542b\u7a7a\u683c\u6216\u7279\u6b8a\u5b57\u7b26\uff0c\u5982\u4f55\u5904\u7406\uff1f<\/strong>
\u5728\u5904\u7406\u8f93\u5165\u65f6\uff0c\u4f7f\u7528strip()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u53bb\u9664\u5b57\u7b26\u4e32\u5f00\u5934\u548c\u7ed3\u5c3e\u7684\u7a7a\u683c\u3002\u5982\u679c\u8f93\u5165\u4e2d\u53ef\u80fd\u5305\u542b\u7279\u6b8a\u5b57\u7b26\uff08\u5982\u5b57\u6bcd\u6216\u7b26\u53f7\uff09\uff0c\u53ef\u4ee5\u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u8fc7\u6ee4\u6389\u8fd9\u4e9b\u5b57\u7b26\u3002\u8fd9\u6837\u53ef\u4ee5\u786e\u4fdd\u8f93\u5165\u88ab\u6b63\u786e\u5224\u65ad\u4e3a\u6570\u5b57\u3002<\/p>\n
\u5982\u4f55\u9a8c\u8bc1\u8f93\u5165\u7684\u6570\u5b57\u662f\u5426\u5728\u7279\u5b9a\u8303\u56f4\u5185\uff1f<\/strong>
\u5728\u786e\u8ba4\u8f93\u5165\u662f\u6570\u5b57\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u7b80\u5355\u7684\u6761\u4ef6\u8bed\u53e5\u6765\u68c0\u67e5\u8be5\u6570\u5b57\u662f\u5426\u5728\u6240\u9700\u7684\u8303\u56f4\u5185\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c06\u8f93\u5165\u7684\u6570\u5b57\u4e0e\u6700\u5c0f\u503c\u548c\u6700\u5927\u503c\u8fdb\u884c\u6bd4\u8f83\uff0c\u4ee5\u786e\u4fdd\u5176\u7b26\u5408\u9884\u671f\u8303\u56f4\uff0c\u8fd9\u5bf9\u4e8e\u7528\u6237\u8f93\u5165\u7684\u6709\u6548\u6027\u9a8c\u8bc1\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5f00\u5934\u6bb5\u843d: \u5728Python\u4e2d\u5224\u65ad\u8f93\u5165\u662f\u5426\u4e3a\u6570\u5b57\uff0c\u53ef\u4ee5\u4f7f\u7528isdigit()\u65b9\u6cd5\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u3001try-excep […]","protected":false},"author":3,"featured_media":1098006,"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\/1097998"}],"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=1097998"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1097998\/revisions"}],"predecessor-version":[{"id":1098007,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1097998\/revisions\/1098007"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1098006"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1097998"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1097998"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1097998"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}