{"id":3424,"date":"2025-05-28T15:19:14","date_gmt":"2025-06-04T07:51:13","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3424"},"modified":"2025-06-04T15:19:14","modified_gmt":"2025-06-04T07:51:13","slug":"%e4%ba%86%e8%a7%a3pythondecorator%ef%bc%9a%e7%b0%a1%e5%96%ae%e6%98%93%e7%94%a8%e7%9a%84%e5%87%bd%e6%95%b8%e4%bf%ae%e9%a3%be%e5%99%a8","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%ba%86%e8%a7%a3pythondecorator%ef%bc%9a%e7%b0%a1%e5%96%ae%e6%98%93%e7%94%a8%e7%9a%84%e5%87%bd%e6%95%b8%e4%bf%ae%e9%a3%be%e5%99%a8\/","title":{"rendered":"2025\u5e74\u6700\u65b0Python Decorator\u6559\u5b78\uff1a\u6df1\u5165\u7406\u89e3\u51fd\u6578\u4fee\u98fe\u5668\u7684\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

<\/p>\n

2025\u5e74\u6700\u65b0Python Decorator\u6559\u5b78<\/h1>\n

Python Decorator \u662f\u4e00\u500b\u975e\u5e38\u6709\u8da3\u7684\u6982\u5ff5\uff0c\u5b83\u53ef\u4ee5\u8b93\u4f60\u5728\u4e0d\u6539\u8b8a\u539f\u6709\u51fd\u5f0f\u7684\u60c5\u6cc1\u4e0b\uff0c\u5c0d\u51fd\u5f0f\u505a\u4e00\u4e9b\u984d\u5916\u7684\u8655\u7406\u3002\u9019\u4f7f\u5f97 Decorator \u6210\u70ba\u63d0\u9ad8\u4ee3\u78bc\u91cd\u7528\u6027\u548c\u53ef\u8b80\u6027\u7684\u4e00\u500b\u91cd\u8981\u5de5\u5177\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Python Decorator \u7684\u57fa\u672c\u6982\u5ff5\u3001\u8a9e\u6cd5\u3001\u61c9\u7528\u7bc4\u4f8b\u53ca\u5176\u6700\u4f73\u5be6\u8e10\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u932f\u8aa4\u6392\u9664\u7684\u5efa\u8b70\u3002<\/p>\n

\u4ec0\u9ebc\u662fPython Decorator\uff1f<\/h2>\n

Python Decorator \u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u51fd\u5f0f\uff0c\u5b83\u63a5\u53d7\u53e6\u4e00\u500b\u51fd\u5f0f\u4f5c\u70ba\u53c3\u6578\uff0c\u4e26\u56de\u50b3\u4e00\u500b\u65b0\u7684\u51fd\u5f0f\u3002\u9019\u500b\u65b0\u7684\u51fd\u5f0f\u901a\u5e38\u6703\u5c0d\u539f\u59cb\u51fd\u5f0f\u9032\u884c\u67d0\u4e9b\u64cd\u4f5c\uff0c\u4f8b\u5982\u589e\u5f37\u529f\u80fd\u6216\u4fee\u6539\u884c\u70ba\uff0c\u800c\u7121\u9700\u76f4\u63a5\u4fee\u6539\u539f\u59cb\u51fd\u5f0f\u7684\u4ee3\u78bc\u3002<\/p>\n

Python Decorator\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n

Python Decorator \u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

“`python
\n@decorator
\ndef func():
\n pass
\n“`<\/p>\n

\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c`@decorator` \u662f\u4e00\u500b Decorator\uff0c\u5b83\u6703\u5c07 `func` \u51fd\u5f0f\u5305\u88dd\u8d77\u4f86\uff0c\u4e26\u56de\u50b3\u4e00\u500b\u65b0\u7684\u51fd\u5f0f\u3002<\/p>\n

\u5982\u4f55\u5be6\u4f5c\u4e00\u500b\u7c21\u55ae\u7684Decorator<\/h2>\n

\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684 Decorator \u5be6\u4f5c\u7bc4\u4f8b\uff0c\u5b83\u6703\u5728\u51fd\u5f0f\u57f7\u884c\u524d\u5f8c\u6253\u5370\u8a0a\u606f\uff1a<\/p>\n

“`python
\ndef my_decorator(func):
\n def wrapper():
\n print(“\u51fd\u5f0f\u57f7\u884c\u524d”)
\n func()
\n print(“\u51fd\u5f0f\u57f7\u884c\u5f8c”)
\n return wrapper<\/p>\n

@my_decorator
\ndef say_hello():
\n print(“Hello, World!”)<\/p>\n

say_hello()
\n“`<\/p>\n

\u57f7\u884c\u7d50\u679c\u5c07\u6703\u662f\uff1a<\/p>\n

“`
\n\u51fd\u5f0f\u57f7\u884c\u524d
\nHello, World!
\n\u51fd\u5f0f\u57f7\u884c\u5f8c
\n“`<\/p>\n

Decorator\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n

Decorator \u7684\u4e00\u500b\u5e38\u898b\u61c9\u7528\u662f\u8a18\u9304\u51fd\u5f0f\u7684\u57f7\u884c\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 Decorator \u8a18\u9304\u57f7\u884c\u6642\u9593\u7684\u7bc4\u4f8b\uff1a<\/p>\n

“`python
\nimport time<\/p>\n

def timeit(func):
\n def wrapper(*args, **kwargs):
\n start = time.time()
\n result = func(*args, **kwargs)
\n end = time.time()
\n print(f”\u51fd\u5f0f {func.__name__} \u57f7\u884c\u6642\u9593: {end – start:.6f} \u79d2”)
\n return result
\n return wrapper<\/p>\n

@timeit
\ndef foo():
\n time.sleep(1)
\n print(“foo”)<\/p>\n

foo()
\n“`<\/p>\n

\u57f7\u884c\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\uff0c\u5c07\u8f38\u51fa\u51fd\u5f0f\u7684\u57f7\u884c\u6642\u9593\u3002<\/p>\n

Decorator\u7684\u5176\u4ed6\u61c9\u7528\u7bc4\u4f8b<\/h2>\n

Python Decorator \u9664\u4e86\u53ef\u4ee5\u7528\u4f86\u8a18\u9304\u51fd\u5f0f\u7684\u57f7\u884c\u6642\u9593\uff0c\u9084\u53ef\u4ee5\u7528\u4f86\u505a\u5f88\u591a\u5176\u4ed6\u7684\u4e8b\u60c5\uff0c\u4f8b\u5982\uff1a<\/p>\n

– \u6aa2\u67e5\u7528\u6236\u662f\u5426\u6709\u6b0a\u9650\u57f7\u884c\u51fd\u5f0f
\n– \u6aa2\u67e5\u51fd\u5f0f\u7684\u53c3\u6578\u662f\u5426\u6b63\u78ba
\n– \u6aa2\u67e5\u51fd\u5f0f\u7684\u8fd4\u56de\u503c\u662f\u5426\u6b63\u78ba
\n– \u5c0d\u51fd\u5f0f\u7684\u7d50\u679c\u9032\u884c\u7de9\u5b58
\n– \u5c0d\u51fd\u5f0f\u7684\u7d50\u679c\u9032\u884c\u58d3\u7e2e<\/p>\n

\u9019\u4e9b\u61c9\u7528\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u4ee3\u78bc\u7684\u53ef\u7dad\u8b77\u6027\u548c\u53ef\u8b80\u6027\u3002<\/p>\n

\u932f\u8aa4\u6392\u9664\u8207\u6700\u4f73\u5be6\u8e10<\/h2>\n

\u5728\u4f7f\u7528 Decorator \u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u5e38\u898b\u7684\u932f\u8aa4\uff0c\u4f8b\u5982\uff1a<\/p>\n

1. **TypeError\uff1a** \u78ba\u4fdd Decorator \u51fd\u5f0f\u7684\u8fd4\u56de\u503c\u662f\u6b63\u78ba\u7684\u51fd\u5f0f\u3002
\n2. **\u4f7f\u7528 functools.wraps\uff1a** \u4f7f\u7528 `functools.wraps` \u53ef\u4ee5\u4fdd\u7559\u539f\u59cb\u51fd\u5f0f\u7684\u5143\u6578\u64da\u3002<\/p>\n

“`python
\nfrom functools import wraps<\/p>\n

def my_decorator(func):
\n @wraps(func)
\n def wrapper(*args, **kwargs):
\n # \u4f60\u7684\u908f\u8f2f
\n return func(*args, **kwargs)
\n return wrapper
\n“`<\/p>\n

\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u5728\u4f7f\u7528 Decorator \u6642\u4e1f\u5931\u51fd\u5f0f\u7684\u540d\u7a31\u548c\u6587\u6a94\u5b57\u7b26\u4e32\u3002<\/p>\n

\u7e3d\u7d50<\/h2>\n

Python Decorator \u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5728\u4e0d\u6539\u8b8a\u539f\u6709\u51fd\u5f0f\u7684\u60c5\u6cc1\u4e0b\u5c0d\u5176\u9032\u884c\u984d\u5916\u8655\u7406\u3002\u5b83\u7684\u57fa\u672c\u8a9e\u6cd5\u548c\u61c9\u7528\u65b9\u6cd5\u5c0d\u65bc\u63d0\u5347 Python \u7a0b\u5f0f\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\u81f3\u95dc\u91cd\u8981\u3002\u6b64\u5916\uff0c\u638c\u63e1 Decorator \u7684\u4f7f\u7528\u9084\u80fd\u5e6b\u52a9\u4f60\u5728\u65e5\u5e38\u958b\u767c\u4e2d\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n

\u60f3\u8981\u6df1\u5165\u5b78\u7fd2 Python \u76f8\u95dc\u7684\u66f4\u591a\u5167\u5bb9\uff0c\u53ef\u4ee5\u53c3\u8003 [\u9019\u88e1\u7684\u6559\u5b78\u6587\u7ae0](https:\/\/vocus.cc)\uff0c\u4ee5\u9032\u4e00\u6b65\u63d0\u5347\u4f60\u7684\u7a0b\u5f0f\u8a2d\u8a08\u6280\u80fd\u3002<\/p>\n

Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n

**Q1: Decorator \u6703\u5f71\u97ff\u51fd\u5f0f\u7684\u57f7\u884c\u901f\u5ea6\u55ce\uff1f**
\nA1: \u662f\u7684\uff0cDecorator \u53ef\u80fd\u6703\u589e\u52a0\u984d\u5916\u7684\u57f7\u884c\u6642\u9593\uff0c\u7279\u5225\u662f\u5728\u9032\u884c\u8a08\u6642\u6216\u8a18\u9304\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n

**Q2: \u5982\u4f55\u5c0d\u5e36\u53c3\u6578\u7684\u51fd\u5f0f\u4f7f\u7528 Decorator\uff1f**
\nA2: \u4f60\u53ef\u4ee5\u5728 Decorator \u4e2d\u5b9a\u7fa9 `*args` \u548c `**kwargs`\uff0c\u9019\u6a23\u53ef\u4ee5\u8655\u7406\u4efb\u610f\u6578\u91cf\u7684\u53c3\u6578\u3002<\/p>\n

**Q3: Decorator \u53ef\u4ee5\u5d4c\u5957\u4f7f\u7528\u55ce\uff1f**
\nA3: \u53ef\u4ee5\uff0cDecorator \u53ef\u4ee5\u5d4c\u5957\u4f7f\u7528\uff0c\u9019\u6a23\u53ef\u4ee5\u540c\u6642\u61c9\u7528\u591a\u500b\u529f\u80fd\u5230\u4e00\u500b\u51fd\u5f0f\u4e0a\u3002<\/p>\n

—<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e86\u89e3PythonDecorator\uff0c\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528\u51fd\u6578\u4fee\u98fe\u5668\uff0c\u7c21\u55ae\u6613\u7528\uff0c\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n","protected":false},"author":1,"featured_media":2518,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[18],"tags":[15],"class_list":["post-3424","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","tag-python"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/badgameshow.com\/steven\/wp-content\/uploads\/2022\/12\/DALL\u00b7E-2022-12-28-14.25.55-\u62f7\u8c9d2.png","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-Te","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3424","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=3424"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3424\/revisions"}],"predecessor-version":[{"id":3425,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3424\/revisions\/3425"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media\/2518"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=3424"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3424"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3424"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}