{"id":936475,"date":"2024-12-26T19:26:52","date_gmt":"2024-12-26T11:26:52","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/936475.html"},"modified":"2024-12-26T19:26:55","modified_gmt":"2024-12-26T11:26:55","slug":"python-def%e5%a6%82%e4%bd%95%e7%bb%93%e6%9d%9f","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/936475.html","title":{"rendered":"python def\u5982\u4f55\u7ed3\u675f"},"content":{"rendered":"

\"python<\/p>\n

\u5728Python\u4e2d\uff0c\u51fd\u6570\u5b9a\u4e49\u4f7f\u7528def<\/code>\u5173\u952e\u5b57\uff0c\u5e76\u901a\u8fc7\u7f29\u8fdb\u6765\u786e\u5b9a\u51fd\u6570\u4f53\u7684\u8303\u56f4\u3002\u8981\u7ed3\u675f\u4e00\u4e2a\u51fd\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528return<\/code>\u8bed\u53e5\u3001\u5230\u8fbe\u51fd\u6570\u4f53\u7684\u672b\u5c3e\u6216\u8005\u5728\u7279\u5b9a\u60c5\u51b5\u4e0b\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u3002<\/strong>\u51fd\u6570\u53ef\u4ee5\u901a\u8fc7return<\/code>\u8bed\u53e5\u8fd4\u56de\u4e00\u4e2a\u503c\u6216\u591a\u4e2a\u503c\uff0c\u4e5f\u53ef\u4ee5\u4e0d\u8fd4\u56de\u4efb\u4f55\u503c\uff08\u9ed8\u8ba4\u4e3aNone<\/code>\uff09\u3002\u5728Python\u4e2d\uff0c\u7f29\u8fdb\u662f\u8bed\u6cd5\u7684\u4e00\u90e8\u5206\uff0c\u56e0\u6b64\u5f53\u51fd\u6570\u4f53\u4e2d\u7684\u4ee3\u7801\u4e0d\u518d\u7f29\u8fdb\u65f6\uff0c\u51fd\u6570\u5b9a\u4e49\u5c31\u7ed3\u675f\u4e86\u3002\u6b64\u5916\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u6765\u63d0\u524d\u9000\u51fa\u51fd\u6570\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528return<\/code>\u8bed\u53e5\u7ed3\u675f\u51fd\u6570<\/p>\n<\/p>\n

return<\/code>\u8bed\u53e5\u662fPython\u4e2d\u7528\u4e8e\u7ed3\u675f\u51fd\u6570\u6267\u884c\u5e76\u8fd4\u56de\u503c\u7684\u5173\u952e\u5b57\u3002\u5f53\u51fd\u6570\u6267\u884c\u5230return<\/code>\u8bed\u53e5\u65f6\uff0c\u5b83\u4f1a\u7acb\u5373\u505c\u6b62\u6267\u884c\uff0c\u5e76\u5c06\u540e\u9762\u7684\u503c\u8fd4\u56de\u7ed9\u8c03\u7528\u8005\u3002return<\/code>\u8bed\u53e5\u53ef\u4ee5\u7528\u4e8e\u8fd4\u56de\u5355\u4e2a\u503c\u3001\u591a\u4e2a\u503c\uff08\u4ee5\u5143\u7ec4\u5f62\u5f0f\uff09\u6216\u4e0d\u8fd4\u56de\u4efb\u4f55\u503c\uff08\u8fd4\u56deNone<\/code>\uff09\u3002\u4f7f\u7528return<\/code>\u8bed\u53e5\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\uff0c\u56e0\u4e3a\u5b83\u660e\u786e\u8868\u793a\u51fd\u6570\u7684\u7ed3\u675f\u70b9\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n

def add(a, b):<\/p>\n
    return a + b<\/p>\n
result = add(3, 5)  # result = 8<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5f53add<\/code>\u51fd\u6570\u6267\u884c\u5230return a + b<\/code>\u65f6\uff0c\u51fd\u6570\u7acb\u5373\u7ed3\u675f\uff0c\u5e76\u5c06\u7ed3\u679c\u8fd4\u56de\u7ed9\u8c03\u7528\u8005\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u5230\u8fbe\u51fd\u6570\u4f53\u672b\u5c3e\u7ed3\u675f\u51fd\u6570<\/p>\n<\/p>\n
\u5f53\u51fd\u6570\u6267\u884c\u5230\u51fd\u6570\u4f53\u7684\u672b\u5c3e\u65f6\uff0c\u51fd\u6570\u4f1a\u81ea\u52a8\u7ed3\u675f\uff0c\u5e76\u8fd4\u56deNone<\/code>\u3002\u8fd9\u79cd\u65b9\u5f0f\u9002\u7528\u4e8e\u4e0d\u9700\u8981\u8fd4\u56de\u503c\u7684\u51fd\u6570\uff0c\u6216\u8005\u51fd\u6570\u7684\u8fd4\u56de\u503c\u4e0d\u91cd\u8981\u7684\u60c5\u51b5\u3002\u867d\u7136\u51fd\u6570\u53ef\u4ee5\u901a\u8fc7\u5230\u8fbe\u672b\u5c3e\u6765\u7ed3\u675f\uff0c\u4f46\u660e\u786e\u4f7f\u7528return<\/code>\u8bed\u53e5\u901a\u5e38\u662f\u66f4\u597d\u7684\u9009\u62e9\uff0c\u56e0\u4e3a\u5b83\u4f7f\u4ee3\u7801\u66f4\u6e05\u6670\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
def greet(name):<\/p>\n
    print(f"Hello, {name}!")<\/p>\n
greet("Alice")  # Output: Hello, Alice!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cgreet<\/code>\u51fd\u6570\u6253\u5370\u4e00\u6761\u6d88\u606f\u540e\uff0c\u51fd\u6570\u4f53\u7ed3\u675f\uff0c\u51fd\u6570\u81ea\u52a8\u7ed3\u675f\u5e76\u8fd4\u56deNone<\/code>\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u7ed3\u675f\u51fd\u6570<\/p>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u51fd\u6570\u53ef\u80fd\u9700\u8981\u5728\u7279\u5b9a\u6761\u4ef6\u4e0b\u63d0\u524d\u9000\u51fa\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u6765\u7ed3\u675f\u51fd\u6570\u3002\u901a\u8fc7\u5728\u51fd\u6570\u4e2d\u5f15\u53d1\u5f02\u5e38\uff0c\u53ef\u4ee5\u7acb\u5373\u505c\u6b62\u51fd\u6570\u7684\u6267\u884c\uff0c\u5e76\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u5f02\u5e38\u5904\u7406\u7a0b\u5e8f\u3002\u867d\u7136\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u5e38\u89c1\uff0c\u4f46\u5728\u67d0\u4e9b\u573a\u666f\u4e0b\u53ef\u80fd\u662f\u6709\u7528\u7684\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
def divide(a, b):<\/p>\n
    if b == 0:<\/p>\n
        rAI<\/a>se ValueError("Division by zero is not allowed.")<\/p>\n
    return a \/ b<\/p>\n
try:<\/p>\n
    result = divide(10, 0)<\/p>\n
except ValueError as e:<\/p>\n
    print(e)  # Output: Division by zero is not allowed.<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5f53b<\/code>\u4e3a0\u65f6\uff0cdivide<\/code>\u51fd\u6570\u5f15\u53d1\u4e00\u4e2aValueError<\/code>\u5f02\u5e38\uff0c\u4ece\u800c\u63d0\u524d\u7ed3\u675f\u51fd\u6570\u7684\u6267\u884c\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528yield<\/code>\u8bed\u53e5\u7ed3\u675f\u751f\u6210\u5668\u51fd\u6570<\/p>\n<\/p>\n
\u5728Python\u4e2d\uff0c\u751f\u6210\u5668\u51fd\u6570\u662f\u4f7f\u7528yield<\/code>\u8bed\u53e5\u800c\u4e0d\u662freturn<\/code>\u8bed\u53e5\u6765\u4ea7\u751f\u503c\u7684\u3002\u751f\u6210\u5668\u51fd\u6570\u7528\u4e8e\u751f\u6210\u4e00\u4e2a\u503c\u5e8f\u5217\uff0c\u6bcf\u6b21\u8c03\u7528\u65f6\u8fd4\u56de\u4e00\u4e2a\u503c\uff0c\u5e76\u5728\u4e0b\u4e00\u6b21\u8c03\u7528\u65f6\u4ece\u4e0a\u6b21\u4e2d\u65ad\u7684\u5730\u65b9\u7ee7\u7eed\u6267\u884c\u3002\u5f53\u751f\u6210\u5668\u51fd\u6570\u6267\u884c\u5230yield<\/code>\u8bed\u53e5\u65f6\uff0c\u5b83\u4f1a\u6682\u505c\u6267\u884c\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u503c\u7ed9\u8c03\u7528\u8005\u3002\u751f\u6210\u5668\u51fd\u6570\u4f1a\u5728\u6ca1\u6709\u66f4\u591a\u503c\u53ef\u4ee5\u751f\u6210\u65f6\u7ed3\u675f\uff0c\u901a\u5e38\u662f\u56e0\u4e3a\u5230\u8fbe\u51fd\u6570\u4f53\u672b\u5c3e\u6216\u663e\u5f0f\u4f7f\u7528return<\/code>\u8bed\u53e5\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
def countdown(n):<\/p>\n
    while n > 0:<\/p>\n
        yield n<\/p>\n
        n -= 1<\/p>\n
for number in countdown(5):<\/p>\n
    print(number)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0ccountdown<\/code>\u51fd\u6570\u662f\u4e00\u4e2a\u751f\u6210\u5668\u51fd\u6570\uff0c\u5b83\u4f7f\u7528yield<\/code>\u8bed\u53e5\u9010\u4e2a\u751f\u6210\u5012\u6570\u5e8f\u5217\u7684\u503c\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u51fd\u6570\u7684\u4f5c\u7528\u57df\u548c\u751f\u547d\u5468\u671f<\/p>\n<\/p>\n
\u4e86\u89e3\u51fd\u6570\u7684\u4f5c\u7528\u57df\u548c\u751f\u547d\u5468\u671f\u5bf9\u4e8e\u6b63\u786e\u4f7f\u7528\u548c\u7ed3\u675f\u51fd\u6570\u975e\u5e38\u91cd\u8981\u3002\u5728Python\u4e2d\uff0c\u51fd\u6570\u7684\u4f5c\u7528\u57df\u662f\u6307\u51fd\u6570\u5185\u90e8\u5b9a\u4e49\u7684\u53d8\u91cf\u548c\u5bf9\u8c61\u7684\u53ef\u89c1\u6027\u3002\u5c40\u90e8\u53d8\u91cf\u662f\u5728\u51fd\u6570\u5185\u90e8\u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u53ea\u5728\u51fd\u6570\u5185\u90e8\u53ef\u89c1\u3002\u5f53\u51fd\u6570\u7ed3\u675f\u65f6\uff0c\u5c40\u90e8\u53d8\u91cf\u7684\u751f\u547d\u5468\u671f\u4e5f\u7ed3\u675f\uff0c\u5185\u5b58\u4f1a\u88ab\u91ca\u653e\u3002<\/p>\n<\/p>\n
\u6b64\u5916\uff0cPython\u4e2d\u7684\u51fd\u6570\u4e5f\u662f\u5bf9\u8c61\uff0c\u53ef\u4ee5\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff0c\u8d4b\u503c\u7ed9\u5176\u4ed6\u53d8\u91cf\uff0c\u751a\u81f3\u5728\u5176\u4ed6\u51fd\u6570\u4e2d\u5b9a\u4e49\u3002\u8fd9\u79cd\u7279\u6027\u4f7f\u5f97Python\u652f\u6301\u9ad8\u9636\u51fd\u6570\u548c\u95ed\u5305\u3002\u5728\u4f7f\u7528\u8fd9\u4e9b\u7279\u6027\u65f6\uff0c\u7406\u89e3\u51fd\u6570\u7684\u4f5c\u7528\u57df\u548c\u751f\u547d\u5468\u671f\u5bf9\u4e8e\u907f\u514d\u6f5c\u5728\u7684\u9519\u8bef\u548c\u5185\u5b58\u6cc4\u6f0f\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002<\/p>\n<\/p>\n
\u603b\u7ed3<\/p>\n<\/p>\n
\u5728Python\u4e2d\uff0c\u51fd\u6570\u53ef\u4ee5\u901a\u8fc7return<\/code>\u8bed\u53e5\u3001\u5230\u8fbe\u51fd\u6570\u4f53\u672b\u5c3e\u6216\u5f02\u5e38\u5904\u7406\u6765\u7ed3\u675f\u3002\u4f7f\u7528return<\/code>\u8bed\u53e5\u53ef\u4ee5\u660e\u786e\u5730\u8868\u793a\u51fd\u6570\u7684\u7ed3\u675f\uff0c\u5e76\u8fd4\u56de\u503c\u7ed9\u8c03\u7528\u8005\u3002\u5230\u8fbe\u51fd\u6570\u4f53\u672b\u5c3e\u65f6\uff0c\u51fd\u6570\u4f1a\u81ea\u52a8\u7ed3\u675f\u5e76\u8fd4\u56deNone<\/code>\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u6765\u63d0\u524d\u9000\u51fa\u51fd\u6570\u3002\u6b64\u5916\uff0c\u5bf9\u4e8e\u751f\u6210\u5668\u51fd\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528yield<\/code>\u8bed\u53e5\u6765\u4ea7\u751f\u503c\uff0c\u5e76\u5728\u6ca1\u6709\u66f4\u591a\u503c\u53ef\u751f\u6210\u65f6\u7ed3\u675f\u51fd\u6570\u3002\u7406\u89e3\u51fd\u6570\u7684\u4f5c\u7528\u57df\u548c\u751f\u547d\u5468\u671f\u5bf9\u4e8e\u6b63\u786e\u4f7f\u7528\u548c\u7ed3\u675f\u51fd\u6570\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u7ed3\u675f\u4e00\u4e2a\u51fd\u6570\u7684\u6267\u884c\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528return<\/code>\u8bed\u53e5\u6765\u7ed3\u675f\u51fd\u6570\u7684\u6267\u884c\u3002return<\/code>\u4e0d\u4ec5\u4f1a\u505c\u6b62\u51fd\u6570\u7684\u8fd0\u884c\uff0c\u8fd8\u53ef\u4ee5\u9009\u62e9\u6027\u5730\u8fd4\u56de\u4e00\u4e2a\u503c\u7ed9\u8c03\u7528\u8be5\u51fd\u6570\u7684\u5730\u65b9\u3002\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u8fd4\u56de\u503c\uff0cPython\u4f1a\u9ed8\u8ba4\u8fd4\u56deNone<\/code>\u3002<\/p>\n
\u5728\u4ec0\u4e48\u60c5\u51b5\u4e0b\u9700\u8981\u7ed3\u675f\u4e00\u4e2aPython\u51fd\u6570\uff1f<\/strong>
\u7ed3\u675f\u4e00\u4e2a\u51fd\u6570\u7684\u6267\u884c\u901a\u5e38\u5728\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u65f6\u8fdb\u884c\u3002\u4f8b\u5982\uff0c\u5f53\u67d0\u4e2a\u8f93\u5165\u53c2\u6570\u4e0d\u7b26\u5408\u8981\u6c42\u65f6\uff0c\u60a8\u53ef\u80fd\u5e0c\u671b\u7acb\u5373\u8fd4\u56de\u9519\u8bef\u4fe1\u606f\u6216\u9ed8\u8ba4\u503c\uff0c\u4ece\u800c\u907f\u514d\u540e\u7eed\u4ee3\u7801\u7684\u6267\u884c\u5f15\u53d1\u5f02\u5e38\u3002<\/p>\n
Python\u4e2d\u662f\u5426\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u505c\u6b62\u51fd\u6570\u7684\u8fd0\u884c\uff1f<\/strong>
\u9664\u4e86\u4f7f\u7528return<\/code>\u8bed\u53e5\u5916\uff0c\u60a8\u8fd8\u53ef\u4ee5\u901a\u8fc7\u629b\u51fa\u5f02\u5e38\u6765\u505c\u6b62\u51fd\u6570\u7684\u6267\u884c\u3002\u4f7f\u7528raise<\/code>\u8bed\u53e5\u53ef\u4ee5\u521b\u5efa\u81ea\u5b9a\u4e49\u7684\u5f02\u5e38\uff0c\u8fd9\u6837\u5f53\u6761\u4ef6\u4e0d\u6ee1\u8db3\u65f6\uff0c\u60a8\u53ef\u4ee5\u901a\u77e5\u8c03\u7528\u8005\u53d1\u751f\u4e86\u9519\u8bef\u3002\u8fd9\u79cd\u65b9\u6cd5\u5728\u8fdb\u884c\u9519\u8bef\u5904\u7406\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u51fd\u6570\u5b9a\u4e49\u4f7f\u7528def\u5173\u952e\u5b57\uff0c\u5e76\u901a\u8fc7\u7f29\u8fdb\u6765\u786e\u5b9a\u51fd\u6570\u4f53\u7684\u8303\u56f4\u3002\u8981\u7ed3\u675f\u4e00\u4e2a\u51fd\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528return […]","protected":false},"author":3,"featured_media":936476,"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\/936475"}],"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=936475"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/936475\/revisions"}],"predecessor-version":[{"id":936477,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/936475\/revisions\/936477"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/936476"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=936475"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=936475"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=936475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}