{"id":3198,"date":"2025-05-28T16:06:26","date_gmt":"2025-06-04T08:37:25","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3198"},"modified":"2025-06-04T16:06:26","modified_gmt":"2025-06-04T08:37:25","slug":"%e4%ba%86%e8%a7%a3pythondecorator%ef%bc%9a%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%ae%83%e4%be%86%e5%a2%9e%e5%bc%b7%e5%8a%9f%e8%83%bd%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%ba%86%e8%a7%a3pythondecorator%ef%bc%9a%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%ae%83%e4%be%86%e5%a2%9e%e5%bc%b7%e5%8a%9f%e8%83%bd%ef%bc%9f\/","title":{"rendered":"\u638c\u63e1 Python Decorator\uff1a2025 \u6700\u65b0\u6700\u4f73\u5be6\u8e10\u8207\u7bc4\u4f8b\u6559\u5b78"},"content":{"rendered":"

<\/p>\n

Python Decorator \u8a73\u89e3<\/h1>\n

Python Decorator \u662f\u4e00\u500b\u5f37\u5927\u4e14\u9748\u6d3b\u7684\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u8b93\u4f60\u5728\u4e0d\u6539\u8b8a\u539f\u6709\u51fd\u5f0f\u7684\u60c5\u6cc1\u4e0b\uff0c\u5c0d\u51fd\u5f0f\u9032\u884c\u984d\u5916\u8655\u7406\u3002\u9019\u4e0d\u50c5\u63d0\u9ad8\u4e86\u4ee3\u78bc\u7684\u91cd\u7528\u6027\uff0c\u9084\u4f7f\u5f97\u4ee3\u78bc\u7d50\u69cb\u66f4\u52a0\u6e05\u6670\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Decorator \u7684\u4f7f\u7528\u65b9\u5f0f\uff0c\u4e26\u63d0\u4f9b2025\u5e74\u6700\u65b0\u7684\u8a9e\u6cd5\u53ca\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n

## \u4ec0\u9ebc\u662f Decorator\uff1f<\/p>\n

Decorator \u662f\u4e00\u500b\u51fd\u5f0f\uff0c\u80fd\u5920\u63a5\u53d7\u53e6\u4e00\u500b\u51fd\u5f0f\u4f5c\u70ba\u53c3\u6578\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u51fd\u5f0f\u3002\u9019\u8b93\u6211\u5011\u80fd\u5920\u5728\u51fd\u5f0f\u57f7\u884c\u524d\u5f8c\u6dfb\u52a0\u81ea\u5b9a\u7fa9\u7684\u884c\u70ba\uff0c\u800c\u4e0d\u9700\u8981\u4fee\u6539\u539f\u59cb\u51fd\u5f0f\u7684\u5be6\u73fe\u3002<\/p>\n

### \u57fa\u672c\u8a9e\u6cd5\u7bc4\u4f8b<\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684 Decorator \u7bc4\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u5305\u88dd\u539f\u59cb\u51fd\u5f0f\uff0c\u4e26\u5728\u547c\u53eb\u4e4b\u524d\u57f7\u884c\u984d\u5916\u7684\u908f\u8f2f\uff1a<\/p>\n

“`python
\ndef decorator_function(original_function):
\n def wrapper_function(*args, **kwargs):
\n print(‘wrapper executed this before {}’.format(original_function.__name__))
\n return original_function(*args, **kwargs)
\n return wrapper_function
\n“`<\/p>\n

\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c`decorator_function` \u63a5\u53d7\u4e00\u500b\u51fd\u5f0f `original_function`\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u51fd\u5f0f `wrapper_function`\u3002\u7576 `wrapper_function` \u88ab\u8abf\u7528\u6642\uff0c\u5b83\u6703\u9996\u5148\u5370\u51fa\u4e00\u689d\u6d88\u606f\uff0c\u7136\u5f8c\u8abf\u7528\u539f\u59cb\u51fd\u5f0f\u3002<\/p>\n

### \u4f7f\u7528 Decorator \u7684\u7bc4\u4f8b<\/p>\n

\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u4f86\u770b\u770b\u5982\u4f55\u5c07\u9019\u500b Decorator \u61c9\u7528\u5230\u4e00\u500b\u51fd\u5f0f\u4e2d\uff1a<\/p>\n

“`python
\n@decorator_function
\ndef display():
\n print(‘display function ran’)<\/p>\n

display()
\n“`<\/p>\n

\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c`display` \u51fd\u5f0f\u88ab `@decorator_function` \u88dd\u98fe\uff0c\u7576\u6211\u5011\u547c\u53eb `display()` \u6642\uff0c\u5c07\u6703\u9996\u5148\u57f7\u884c Decorator \u4e2d\u7684\u908f\u8f2f\uff0c\u7136\u5f8c\u624d\u57f7\u884c `display` \u51fd\u5f0f\u672c\u8eab\u3002<\/p>\n

## \u932f\u8aa4\u6392\u9664<\/p>\n

\u5728\u4f7f\u7528 Decorator \u6642\uff0c\u4f60\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u5e38\u898b\u7684\u932f\u8aa4\uff0c\u5982\u4e0b\uff1a<\/p>\n

– **TypeError**\uff1a\u5982\u679c\u4f60\u7684 Decorator \u6c92\u6709\u6b63\u78ba\u8655\u7406\u53c3\u6578\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u9019\u7a2e\u932f\u8aa4\u3002\u78ba\u4fdd `wrapper_function` \u4f7f\u7528 `*args` \u548c `**kwargs` \u4f86\u6355\u6349\u6240\u6709\u50b3\u5165\u7684\u53c3\u6578\u3002
\n– **\u4e1f\u5931\u51fd\u5f0f\u5143\u6578\u64da**\uff1a\u4f7f\u7528 `functools.wraps` \u53ef\u4ee5\u4fdd\u7559\u539f\u59cb\u51fd\u5f0f\u7684\u5143\u6578\u64da\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d Decorator \u4f7f\u5f97\u539f\u59cb\u51fd\u5f0f\u7684\u540d\u7a31\u548c\u6587\u6a94\u5b57\u7b26\u4e32\u4e1f\u5931\u3002<\/p>\n

\u4f8b\u5982\uff1a<\/p>\n

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

def decorator_function(original_function):
\n @wraps(original_function)
\n def wrapper_function(*args, **kwargs):
\n print(‘wrapper executed this before {}’.format(original_function.__name__))
\n return original_function(*args, **kwargs)
\n return wrapper_function
\n“`<\/p>\n

## \u5ef6\u4f38\u61c9\u7528<\/p>\n

Decorator \u4e0d\u50c5\u9650\u65bc\u7c21\u55ae\u7684\u65e5\u8a8c\u8f38\u51fa\u3002\u4f60\u9084\u53ef\u4ee5\u64f4\u5c55\u5176\u529f\u80fd\uff0c\u4f8b\u5982\uff1a<\/p>\n

– **\u8a08\u6642\u51fd\u5f0f\u57f7\u884c\u6642\u9593**\uff1a\u53ef\u4ee5\u5275\u5efa\u4e00\u500b Decorator\uff0c\u8a08\u7b97\u51fd\u5f0f\u57f7\u884c\u7684\u6642\u9593\uff0c\u9019\u5728\u6027\u80fd\u8abf\u512a\u4e2d\u975e\u5e38\u6709\u7528\u3002
\n– **\u9a57\u8b49\u7528\u6236\u6b0a\u9650**\uff1a\u5728 Web \u61c9\u7528\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 Decorator \u4f86\u6aa2\u67e5\u7528\u6236\u662f\u5426\u6709\u6b0a\u9650\u57f7\u884c\u67d0\u500b\u64cd\u4f5c\u3002<\/p>\n

## \u7d50\u8ad6<\/p>\n

Python Decorator \u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u5b83\u4f7f\u5f97\u51fd\u5f0f\u7684\u64f4\u5c55\u8b8a\u5f97\u7c21\u55ae\u800c\u9ad8\u6548\u3002\u7121\u8ad6\u662f\u7528\u65bc\u65e5\u8a8c\u3001\u8a08\u6642\u9084\u662f\u6b0a\u9650\u9a57\u8b49\uff0cDecorator \u90fd\u80fd\u63d0\u5347\u4ee3\u78bc\u7684\u6574\u6f54\u6027\u8207\u53ef\u8b80\u6027\u3002\u60f3\u8981\u4e86\u89e3\u66f4\u591a Python \u7684\u9032\u968e\u7528\u6cd5\uff0c\u8acb\u53c3\u8003 [vocus.cc \u7684 Python \u6559\u5b78\u6587\u7ae0](https:\/\/vocus.cc)\u3002<\/p>\n

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

### Q1: Decorator \u53ef\u4ee5\u7528\u4f86\u505a\u4ec0\u9ebc\uff1f
\nA1: Decorator \u53ef\u4ee5\u7528\u4f86\u6dfb\u52a0\u65e5\u8a8c\u3001\u8a08\u6642\u51fd\u5f0f\u57f7\u884c\u6642\u9593\u3001\u6aa2\u67e5\u7528\u6236\u6b0a\u9650\u7b49\uff0c\u5e6b\u52a9\u63d0\u9ad8\u4ee3\u78bc\u7684\u53ef\u91cd\u7528\u6027\u8207\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n

### Q2: \u5982\u4f55\u8655\u7406 Decorator \u4e2d\u7684\u932f\u8aa4\uff1f
\nA2: \u4f7f\u7528 `*args` \u548c `**kwargs` \u4f86\u6355\u6349\u6240\u6709\u50b3\u5165\u7684\u53c3\u6578\uff0c\u4e26\u4f7f\u7528 `functools.wraps` \u4f86\u4fdd\u7559\u539f\u59cb\u51fd\u5f0f\u7684\u5143\u6578\u64da\u3002<\/p>\n

### Q3: Decorator \u7684\u6700\u4f73\u5be6\u8e10\u662f\u4ec0\u9ebc\uff1f
\nA3: \u4f7f\u7528 `functools.wraps` \u4fdd\u5b58\u539f\u59cb\u51fd\u5f0f\u7684\u540d\u7a31\u548c\u6587\u6a94\u5b57\u7b26\u4e32\uff0c\u4e26\u78ba\u4fdd Decorator \u53ef\u4ee5\u9748\u6d3b\u8655\u7406\u4e0d\u540c\u7684\u53c3\u6578\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002
\n—<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e86\u89e3PythonDecorator\uff0c\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u589e\u5f37\u51fd\u6578\u7684\u529f\u80fd\uff0c\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\uff0c\u66f4\u5feb\u5730\u958b\u767c\u51fa\u66f4\u512a\u8cea\u7684\u7a0b\u5f0f\u78bc\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-3198","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-PA","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3198","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=3198"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3198\/revisions"}],"predecessor-version":[{"id":3199,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3198\/revisions\/3199"}],"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=3198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3198"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}