{"id":1140370,"date":"2025-01-08T22:20:06","date_gmt":"2025-01-08T14:20:06","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1140370.html"},"modified":"2025-01-08T22:20:09","modified_gmt":"2025-01-08T14:20:09","slug":"python3%e4%b8%ad%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%ad%e8%be%93%e5%85%a5%e7%9a%84%e6%98%af%e4%b8%8d%e6%98%af%e6%95%b0%e5%ad%97","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1140370.html","title":{"rendered":"python3\u4e2d\u5982\u4f55\u5224\u65ad\u8f93\u5165\u7684\u662f\u4e0d\u662f\u6570\u5b57"},"content":{"rendered":"

\"python3\u4e2d\u5982\u4f55\u5224\u65ad\u8f93\u5165\u7684\u662f\u4e0d\u662f\u6570\u5b57\"<\/p>\n

\u5728Python3\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5224\u65ad\u8f93\u5165\u7684\u5185\u5bb9\u662f\u5426\u4e3a\u6570\u5b57<\/strong>\uff0c\u5305\u62ec\u4f7f\u7528\u5185\u7f6e\u51fd\u6570\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u548c\u7c7b\u578b\u8f6c\u6362\u7b49\u3002\u5176\u4e2d\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528.isdigit()<\/code>\u65b9\u6cd5\u3001try-except<\/code>\u5757\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\u3001\u4ee5\u53ca\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u8fdb\u884c\u5339\u914d\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u51e0\u79cd\u65b9\u6cd5\uff0c\u5e76\u89e3\u91ca\u5982\u4f55\u5728\u4e0d\u540c\u573a\u666f\u4e0b\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

1\u3001\u4f7f\u7528.isdigit()\u65b9\u6cd5<\/strong><\/p>\n

.isdigit()<\/code>\u65b9\u6cd5\u662f\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u53ea\u5305\u542b\u6570\u5b57\u5b57\u7b26\u7684\u6700\u7b80\u5355\u65b9\u6cd5\u4e4b\u4e00\u3002\u8fd9\u79cd\u65b9\u6cd5\u5bf9\u4e8e\u7eaf\u6570\u5b57\u5b57\u7b26\u4e32\uff08\u4e0d\u542b\u5c0f\u6570\u70b9\u6216\u8d1f\u53f7\uff09\u975e\u5e38\u6709\u6548\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n

user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u503c: ")<\/p>\n
if user_input.isdigit():<\/p>\n
    print("\u8fd9\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
else:<\/p>\n
    print("\u8fd9\u4e0d\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001try-except\u5757\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362<\/h3>\n<\/p>\n
\u53e6\u4e00\u79cd\u5e38\u89c1\u7684\u65b9\u6cd5\u662f\u4f7f\u7528try-except<\/code>\u5757\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u70b9\u662f\u53ef\u4ee5\u5904\u7406\u5305\u62ec\u5c0f\u6570\u548c\u8d1f\u6570\u5728\u5185\u7684\u5404\u79cd\u6570\u5b57\u683c\u5f0f\u3002\u53ef\u4ee5\u4f7f\u7528int()<\/code>\u548cfloat()<\/code>\u51fd\u6570\u8fdb\u884c\u8f6c\u6362\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u503c: ")<\/p>\n
try:<\/p>\n
    val = float(user_input)<\/p>\n
    print("\u8fd9\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
except ValueError:<\/p>\n
    print("\u8fd9\u4e0d\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u80fd\u5904\u7406\u6574\u6570\uff0c\u8fd8\u80fd\u5904\u7406\u6d6e\u70b9\u6570\u548c\u79d1\u5b66\u8ba1\u6570\u6cd5\u8868\u793a\u7684\u6570\u5b57\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u6b63\u5219\u8868\u8fbe\u5f0f<\/h3>\n<\/p>\n
\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u5f3a\u5927\u4e14\u7075\u6d3b\u7684\u5de5\u5177\uff0c\u7528\u4e8e\u5b57\u7b26\u4e32\u6a21\u5f0f\u5339\u914d\u3002\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u5224\u65ad\u8f93\u5165\u662f\u5426\u662f\u6570\u5b57\uff0c\u5305\u62ec\u5904\u7406\u5c0f\u6570\u70b9\u548c\u8d1f\u53f7\u3002\u4f8b\u5982\uff1a<\/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("\u8fd9\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
else:<\/p>\n
    print("\u8fd9\u4e0d\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u66f4\u7cbe\u786e\u5730\u63a7\u5236\u5339\u914d\u89c4\u5219\uff0c\u4f46\u4e5f\u76f8\u5bf9\u590d\u6742\u4e00\u4e9b\u3002<\/p>\n<\/p>\n
\u56db\u3001\u7ed3\u5408\u591a\u79cd\u65b9\u6cd5\u7684\u7efc\u5408\u5224\u65ad<\/h3>\n<\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5f80\u5f80\u9700\u8981\u7efc\u5408\u591a\u79cd\u65b9\u6cd5\u6765\u8fdb\u884c\u66f4\u52a0\u4e25\u8c28\u7684\u5224\u65ad\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7efc\u5408\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import re<\/p>\n
def is_number(s):<\/p>\n
    if s.isdigit():<\/p>\n
        return True<\/p>\n
    try:<\/p>\n
        float(s)<\/p>\n
        return True<\/p>\n
    except ValueError:<\/p>\n
        return False<\/p>\n
user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u503c: ")<\/p>\n
if is_number(user_input):<\/p>\n
    print("\u8fd9\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
else:<\/p>\n
    print("\u8fd9\u4e0d\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001\u5904\u7406\u7279\u6b8a\u5b57\u7b26\u548c\u975e\u6807\u51c6\u6570\u5b57\u683c\u5f0f<\/h3>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165\u53ef\u80fd\u5305\u542b\u4e00\u4e9b\u7279\u6b8a\u5b57\u7b26\uff0c\u5982\u7a7a\u683c\u3001\u9017\u53f7\u7b49\uff0c\u9700\u8981\u8fdb\u884c\u9884\u5904\u7406\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
def preprocess_input(s):<\/p>\n
    return s.replace(",", "").strip()<\/p>\n
user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u503c: ")<\/p>\n
user_input = preprocess_input(user_input)<\/p>\n
if is_number(user_input):<\/p>\n
    print("\u8fd9\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
else:<\/p>\n
    print("\u8fd9\u4e0d\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u516d\u3001\u5904\u7406\u79d1\u5b66\u8ba1\u6570\u6cd5\u548c\u590d\u6570<\/h3>\n<\/p>\n
\u5728\u79d1\u5b66\u8ba1\u7b97\u4e2d\uff0c\u6709\u65f6\u9700\u8981\u5904\u7406\u79d1\u5b66\u8ba1\u6570\u6cd5\u8868\u793a\u7684\u6570\u5b57\u548c\u590d\u6570\u3002\u53ef\u4ee5\u6269\u5c55is_number<\/code>\u51fd\u6570\u6765\u5904\u7406\u8fd9\u4e9b\u60c5\u51b5\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
def is_number(s):<\/p>\n
    try:<\/p>\n
        complex(s)<\/p>\n
        return True<\/p>\n
    except ValueError:<\/p>\n
        return False<\/p>\n
user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u503c: ")<\/p>\n
if is_number(user_input):<\/p>\n
    print("\u8fd9\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
else:<\/p>\n
    print("\u8fd9\u4e0d\u662f\u4e00\u4e2a\u6570\u5b57\u3002")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e03\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u5728Python3\u4e2d\u5224\u65ad\u8f93\u5165\u662f\u5426\u4e3a\u6570\u5b57\u7684\u65b9\u6cd5\u591a\u79cd\u591a\u6837\uff0c\u5e94\u6839\u636e\u5177\u4f53\u5e94\u7528\u573a\u666f\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002\u4f7f\u7528.isdigit()\u65b9\u6cd5\u3001try-except\u5757\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d<\/strong>\u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\uff0c\u7ed3\u5408\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u66f4\u52a0\u5168\u9762\u7684\u5224\u65ad\u3002\u5904\u7406\u7279\u6b8a\u5b57\u7b26\u548c\u975e\u6807\u51c6\u6570\u5b57\u683c\u5f0f\u3001\u79d1\u5b66\u8ba1\u6570\u6cd5\u548c\u590d\u6570\u7b49\u7279\u6b8a\u60c5\u51b5\u65f6\uff0c\u4e5f\u9700\u8981\u8fdb\u884c\u76f8\u5e94\u7684\u9884\u5904\u7406\u548c\u6269\u5c55\u3002\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u5224\u65ad\u8f93\u5165\u662f\u5426\u4e3a\u6570\u5b57\uff0c\u786e\u4fdd\u7a0b\u5e8f\u7684\u6b63\u786e\u6027\u548c\u9c81\u68d2\u6027\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5728Python3\u4e2d\uff0c\u5982\u4f55\u6709\u6548\u5730\u68c0\u67e5\u7528\u6237\u8f93\u5165\u662f\u5426\u4e3a\u6570\u5b57\uff1f<\/strong>
\u53ef\u4ee5\u4f7f\u7528str.isdigit()<\/code>\u65b9\u6cd5\u6765\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u53ea\u5305\u542b\u6570\u5b57\u5b57\u7b26\u3002\u6b64\u5916\uff0ctry...except<\/code>\u7ed3\u6784\u914d\u5408float()<\/code>\u51fd\u6570\u4e5f\u80fd\u6709\u6548\u6355\u6349\u8f93\u5165\u4e2d\u7684\u975e\u6570\u5b57\u5185\u5bb9\uff0c\u4ece\u800c\u5224\u65ad\u8f93\u5165\u662f\u5426\u5408\u6cd5\u3002<\/p>\n
\u5728\u8f93\u5165\u4e2d\u5305\u542b\u5c0f\u6570\u6216\u8d1f\u53f7\u65f6\uff0c\u5982\u4f55\u5224\u65ad\u5b83\u4eec\u662f\u5426\u4e3a\u6570\u5b57\uff1f<\/strong>
\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528float()<\/code>\u51fd\u6570\u662f\u4e2a\u597d\u9009\u62e9\u3002\u901a\u8fc7\u5c1d\u8bd5\u5c06\u8f93\u5165\u8f6c\u6362\u4e3a\u6d6e\u70b9\u6570\uff0c\u53ef\u4ee5\u540c\u65f6\u5904\u7406\u6574\u6570\u3001\u5c0f\u6570\u548c\u8d1f\u6570\u3002\u5982\u679c\u8f6c\u6362\u6210\u529f\uff0c\u5219\u8bf4\u660e\u8f93\u5165\u662f\u6709\u6548\u7684\u6570\u5b57\u3002\u4f7f\u7528try...except<\/code>\u5757\u53ef\u4ee5\u65b9\u4fbf\u5730\u6355\u83b7\u8f6c\u6362\u4e2d\u7684\u5f02\u5e38\u3002<\/p>\n
\u6709\u6ca1\u6709\u7b80\u5355\u7684\u793a\u4f8b\u4ee3\u7801\u53ef\u4ee5\u5c55\u793a\u5982\u4f55\u5224\u65ad\u8f93\u5165\u662f\u5426\u4e3a\u6570\u5b57\uff1f<\/strong>
\u5f53\u7136\u53ef\u4ee5\uff01\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n
user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u6570\u5b57\uff1a")\ntry:\n    number = float(user_input)\n    print(f"{user_input} \u662f\u4e00\u4e2a\u6709\u6548\u7684\u6570\u5b57\u3002")\nexcept ValueError:\n    print(f"{user_input} \u4e0d\u662f\u4e00\u4e2a\u6709\u6548\u7684\u6570\u5b57\u3002")\n<\/code><\/pre>\n
\u8fd9\u6bb5\u4ee3\u7801\u5c06\u63d0\u793a\u7528\u6237\u8f93\u5165\uff0c\u5e76\u68c0\u67e5\u8f93\u5165\u662f\u5426\u53ef\u4ee5\u8f6c\u6362\u4e3a\u6570\u5b57\uff0c\u7ed9\u51fa\u76f8\u5e94\u7684\u53cd\u9988\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python3\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5224\u65ad\u8f93\u5165\u7684\u5185\u5bb9\u662f\u5426\u4e3a\u6570\u5b57\uff0c\u5305\u62ec\u4f7f\u7528\u5185\u7f6e\u51fd\u6570\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u548c\u7c7b\u578b\u8f6c\u6362\u7b49\u3002\u5176\u4e2d\u6700 […]","protected":false},"author":3,"featured_media":1140377,"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\/1140370"}],"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=1140370"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1140370\/revisions"}],"predecessor-version":[{"id":1140378,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1140370\/revisions\/1140378"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1140377"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1140370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1140370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1140370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}