{"id":3364,"date":"2025-06-03T15:39:06","date_gmt":"2025-06-04T08:08:06","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3364"},"modified":"2025-06-04T15:39:06","modified_gmt":"2025-06-04T08:08:06","slug":"%e4%ba%86%e8%a7%a3python%e4%b8%ad%e7%9a%84weakref%e5%87%bd%e6%95%b8-2","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%ba%86%e8%a7%a3python%e4%b8%ad%e7%9a%84weakref%e5%87%bd%e6%95%b8-2\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Python \u4e2d\u7684 weakref() \u51fd\u6578\uff1a2025 \u6700\u65b0\u8a9e\u6cd5\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

<\/p>\n

\u6df1\u5165\u4e86\u89e3 Python \u4e2d\u7684 weakref() \u51fd\u6578<\/h1>\n

\u5728 Python \u4e2d\uff0c`weakref()` \u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u51fd\u6578\uff0c\u5b83\u5141\u8a31\u4f60\u5efa\u7acb\u4e00\u500b\u5f31\u53c3\u8003\uff0c\u9019\u610f\u5473\u8457\u9019\u500b\u53c3\u8003\u4e0d\u6703\u963b\u6b62\u5176\u6240\u6307\u5411\u7684\u7269\u4ef6\u88ab\u5783\u573e\u56de\u6536\u3002\u9019\u4e00\u7279\u6027\u5c0d\u65bc\u8a18\u61b6\u9ad4\u7ba1\u7406\u5c24\u5176\u91cd\u8981\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u578b\u6578\u64da\u7d50\u69cb\u6216\u7de9\u5b58\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e `weakref()` \u7684\u7528\u6cd5\u3001\u512a\u9ede\u53ca\u7f3a\u9ede\uff0c\u4e26\u63d0\u4f9b\u5be6\u4f5c\u7bc4\u4f8b\u3002<\/p>\n

\u4ec0\u9ebc\u662f weakref()\uff1f<\/h2>\n

`weakref()` \u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u5275\u5efa\u4e00\u500b\u5f31\u53c3\u8003\uff0c\u9019\u610f\u5473\u8457\u7576\u539f\u59cb\u7269\u4ef6\u88ab\u5783\u573e\u56de\u6536\u6642\uff0c\u9019\u500b\u53c3\u8003\u4e5f\u6703\u81ea\u52d5\u88ab\u56de\u6536\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8a18\u61b6\u9ad4\u4f54\u7528\uff0c\u4e26\u4e14\u4e0d\u6703\u5f71\u97ff\u539f\u6709\u7269\u4ef6\u7684\u751f\u547d\u9031\u671f\u3002<\/p>\n

\u4f7f\u7528 weakref() \u7684\u57fa\u672c\u65b9\u6cd5<\/h2>\n

\u4f7f\u7528 `weakref` \u51fd\u6578\u975e\u5e38\u7c21\u55ae\uff0c\u53ea\u9700\u5c0e\u5165\u6a21\u7d44\u4e26\u50b3\u5165\u4e00\u500b\u7269\u4ef6\u5373\u53ef\uff1a<\/p>\n

“`python
\nimport weakref<\/p>\n

class SomeObject:
\n pass<\/p>\n

obj = SomeObject()
\nref = weakref.ref(obj)
\n“`<\/p>\n

\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b `SomeObject` \u7684\u5be6\u4f8b\uff0c\u4e26\u7528 `weakref.ref` \u5275\u5efa\u4e86\u4e00\u500b\u6307\u5411\u8a72\u5be6\u4f8b\u7684\u5f31\u53c3\u8003\u3002\u7576 `obj` \u88ab\u5783\u573e\u56de\u6536\u6642\uff0c`ref()` \u5c07\u8fd4\u56de `None`\u3002<\/p>\n

\u8a2d\u7f6e\u56de\u8abf\u51fd\u6578<\/h2>\n

`weakref()` \u4e5f\u53ef\u4ee5\u63a5\u53d7\u4e00\u500b\u56de\u8abf\u51fd\u6578\uff0c\u7576\u539f\u6709\u7269\u4ef6\u88ab\u5783\u573e\u56de\u6536\u6642\uff0c\u8a72\u51fd\u6578\u5c07\u88ab\u8abf\u7528\u3002\u9019\u5c0d\u65bc\u57f7\u884c\u6e05\u7406\u64cd\u4f5c\u975e\u5e38\u6709\u7528\uff1a<\/p>\n

“`python
\nimport weakref<\/p>\n

def on_delete(ref):
\n print(‘Object deleted!’)<\/p>\n

obj = SomeObject()
\nref = weakref.ref(obj, on_delete)
\n“`<\/p>\n

\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u7576 `obj` \u88ab\u5783\u573e\u56de\u6536\u6642\uff0c`on_delete` \u51fd\u6578\u5c07\u88ab\u81ea\u52d5\u8abf\u7528\uff0c\u8f38\u51fa `Object deleted!`\u3002<\/p>\n

weakref() \u7684\u512a\u9ede<\/h2>\n

1. **\u8a18\u61b6\u9ad4\u7ba1\u7406**\uff1a\u4f7f\u7528 `weakref()` \u53ef\u4ee5\u907f\u514d\u5faa\u74b0\u5f15\u7528\u5c0e\u81f4\u7684\u8a18\u61b6\u9ad4\u6cc4\u6f0f\uff0c\u9019\u662f\u8a31\u591a\u5927\u578b\u61c9\u7528\u7a0b\u5e8f\u4e2d\u5e38\u898b\u7684\u554f\u984c\u3002
\n2. **\u9ad8\u6548\u7684\u8cc7\u6e90\u4f7f\u7528**\uff1a\u7531\u65bc\u5f31\u53c3\u8003\u4e0d\u6703\u963b\u6b62\u7269\u4ef6\u7684\u56de\u6536\uff0c\u9019\u6709\u52a9\u65bc\u4fdd\u6301\u4f4e\u5167\u5b58\u4f54\u7528\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u578b\u6578\u64da\u7d50\u69cb\u6642\u3002<\/p>\n

weakref() \u7684\u7f3a\u9ede<\/h2>\n

1. **\u4e0d\u53ef\u9810\u6e2c\u6027**\uff1a\u5f31\u53c3\u8003\u7684\u751f\u547d\u9031\u671f\u4e0d\u5982\u5f37\u53c3\u8003\u7a69\u5b9a\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u5728\u8a2a\u554f\u5df2\u88ab\u56de\u6536\u7684\u7269\u4ef6\u6642\u51fa\u73fe `None`\u3002
\n2. **\u8abf\u8a66\u56f0\u96e3**\uff1a\u7531\u65bc\u5783\u573e\u56de\u6536\u884c\u70ba\u7684\u4e0d\u78ba\u5b9a\u6027\uff0c\u8abf\u8a66\u6d89\u53ca\u5f31\u53c3\u8003\u7684\u7a0b\u5f0f\u78bc\u53ef\u80fd\u6703\u8b8a\u5f97\u8907\u96dc\u3002<\/p>\n

\u5ef6\u4f38\u61c9\u7528<\/h2>\n

`weakref` \u5728\u8a31\u591a\u60c5\u5883\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\uff1a<\/p>\n

– **\u7de9\u5b58\u7cfb\u7d71**\uff1a\u5728\u8a2d\u8a08\u7de9\u5b58\u7cfb\u7d71\u6642\uff0c\u4f7f\u7528\u5f31\u53c3\u8003\u53ef\u4ee5\u8b93\u7de9\u5b58\u7269\u4ef6\u5728\u5167\u5b58\u4e0d\u8db3\u6642\u81ea\u52d5\u88ab\u56de\u6536\u3002
\n– **\u4e8b\u4ef6\u76e3\u807d\u5668**\uff1a\u5728\u4e00\u4e9b\u4e8b\u4ef6\u9a45\u52d5\u7684\u67b6\u69cb\u4e2d\uff0c\u4f7f\u7528\u5f31\u53c3\u8003\u53ef\u4ee5\u907f\u514d\u5faa\u74b0\u5f15\u7528\uff0c\u5f9e\u800c\u78ba\u4fdd\u4e8b\u4ef6\u76e3\u807d\u5668\u53ef\u4ee5\u88ab\u6b63\u5e38\u56de\u6536\u3002<\/p>\n

\u7e3d\u7d50<\/h2>\n

Python \u4e2d\u7684 `weakref()` \u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\uff0c\u5b83\u5141\u8a31\u4f60\u5728\u4e0d\u5f71\u97ff\u539f\u6709\u7269\u4ef6\u7684\u60c5\u6cc1\u4e0b\u5efa\u7acb\u4e00\u500b\u5f31\u53c3\u8003\u3002\u96d6\u7136\u5176\u5b58\u5728\u4e00\u4e9b\u7f3a\u9ede\uff0c\u4f46\u5728\u5408\u9069\u7684\u60c5\u5883\u4e0b\uff0c`weakref()` \u53ef\u4ee5\u70ba\u8a18\u61b6\u9ad4\u7ba1\u7406\u63d0\u4f9b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u4e86\u89e3\u5982\u4f55\u4f7f\u7528\u9019\u4e00\u5de5\u5177\uff0c\u5c07\u4f7f\u4f60\u5728 Python \u7a0b\u5f0f\u8a2d\u8a08\u4e2d\u66f4\u52a0\u5f97\u5fc3\u61c9\u624b\u3002<\/p>\n

\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3 Python \u7684\u8a18\u61b6\u9ad4\u7ba1\u7406\uff0c\u8acb\u53c3\u8003\u9019\u7bc7\u6587\u7ae0\uff1a[\u8a18\u61b6\u9ad4\u7ba1\u7406\u5728 Python \u4e2d\u7684\u61c9\u7528](https:\/\/vocus.cc\/article\/6051b7ef8d2b7400171c0c7d) \u3002<\/p>\n

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

**Q1: weakref \u548c\u666e\u901a\u5f15\u7528\u6709\u4ec0\u9ebc\u5340\u5225\uff1f**
\nA1: \u666e\u901a\u5f15\u7528\u6703\u589e\u52a0\u7269\u4ef6\u7684\u5f15\u7528\u8a08\u6578\uff0c\u5f9e\u800c\u9632\u6b62\u5176\u88ab\u5783\u573e\u56de\u6536\uff0c\u800c weakref \u5247\u4e0d\u6703\u5f71\u97ff\u7269\u4ef6\u7684\u751f\u547d\u9031\u671f\u3002<\/p>\n

**Q2: weakref \u53ef\u4ee5\u7528\u65bc\u6240\u6709\u7269\u4ef6\u55ce\uff1f**
\nA2: \u662f\u7684\uff0c\u6240\u6709 Python \u7269\u4ef6\u90fd\u53ef\u4ee5\u4f7f\u7528 weakref \u5275\u5efa\u5f31\u53c3\u8003\uff0c\u4f46\u67d0\u4e9b\u7269\u4ef6\u53ef\u80fd\u9700\u8981\u7279\u5225\u8655\u7406\uff0c\u4f8b\u5982\u81ea\u5b9a\u7fa9\u985e\u3002<\/p>\n

**Q3: \u5982\u4f55\u6aa2\u67e5 weakref \u662f\u5426\u4ecd\u7136\u6709\u6548\uff1f**
\nA3: \u53ef\u4ee5\u901a\u904e\u8abf\u7528 `ref()` \u65b9\u6cd5\u4f86\u6aa2\u67e5\uff0c\u5982\u679c\u8fd4\u56de `None`\uff0c\u5247\u8868\u793a\u539f\u59cb\u7269\u4ef6\u5df2\u88ab\u56de\u6536\u3002<\/p>\n

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

Weakref()\u51fd\u6578\u662fPython\u4e2d\u7684\u4e00\u7a2e\u5f31\u53c3\u8003\uff0c\u5b83\u53ef\u4ee5\u8b93\u4f60\u5728\u4e0d\u6539\u8b8a\u539f\u6709\u7269\u4ef6\u7684\u60c5\u6cc1\u4e0b\uff0c\u5c0d\u7269\u4ef6\u9032\u884c\u5f31\u53c3\u8003\uff0c\u4ee5\u4fbf\u5728\u5fc5\u8981\u6642\u53ef\u4ee5\u53d6\u5f97\u7269\u4ef6\u7684\u8cc7\u8a0a\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39Python\u4e2d\u7684Weakref()\u51fd\u6578\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\uff0c\u8b93\u4f60\u66f4\u52a0\u4e86\u89e3\u5b83\u7684\u529f\u80fd\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-3364","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-Sg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3364","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=3364"}],"version-history":[{"count":2,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3364\/revisions"}],"predecessor-version":[{"id":12854,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3364\/revisions\/12854"}],"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=3364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}