{"id":3172,"date":"2025-05-28T16:10:52","date_gmt":"2025-06-04T08:42:51","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3172"},"modified":"2025-06-04T16:10:52","modified_gmt":"2025-06-04T08:42:51","slug":"%e4%ba%86%e8%a7%a3python%e4%b8%ad%e7%9a%84weakref%e5%87%bd%e6%95%b8","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\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Python \u7684 weakref() \u51fd\u5f0f\uff1a2025 \u6700\u65b0\u7528\u6cd5\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

<\/p>\n

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

\u5728 Python \u4e2d\uff0c`weakref()` \u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u51fd\u5f0f\uff0c\u53ef\u4ee5\u8b93\u4f60\u5728\u4e0d\u5f71\u97ff\u539f\u6709\u7269\u4ef6\u7684\u60c5\u6cc1\u4e0b\uff0c\u53d6\u5f97\u7269\u4ef6\u7684\u5f31\u53c3\u7167\uff08weak reference\uff09\u3002\u9019\u5c0d\u65bc\u7ba1\u7406\u5927\u578b\u7269\u4ef6\u7684\u751f\u547d\u9031\u671f\u548c\u6e1b\u5c11\u8a18\u61b6\u9ad4\u4f7f\u7528\u975e\u5e38\u91cd\u8981\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u5f31\u53c3\u7167\uff1f<\/h2>\n

\u5f31\u53c3\u7167\uff08weak reference\uff09\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u53c3\u7167\u65b9\u5f0f\uff0c\u5b83\u5141\u8a31\u4f60\u53d6\u5f97\u7269\u4ef6\u7684\u53c3\u7167\uff0c\u800c\u4e0d\u6703\u5f71\u97ff\u5230\u7269\u4ef6\u7684\u751f\u547d\u9031\u671f\u3002\u9019\u610f\u5473\u8457\u7576\u539f\u6709\u7269\u4ef6\u4e0d\u518d\u88ab\u5176\u4ed6\u5f37\u53c3\u7167\u6240\u5f15\u7528\u6642\uff0c\u5b83\u5c07\u6703\u88ab\u81ea\u52d5\u5783\u573e\u56de\u6536\uff0c\u800c\u5f31\u53c3\u7167\u5247\u6703\u8b8a\u6210 None\u3002\u9019\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u53ef\u4ee5\u9632\u6b62\u8a18\u61b6\u9ad4\u6d29\u6f0f\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528 weakref() \u51fd\u5f0f<\/h2>\n

\u4f7f\u7528 `weakref()` \u51fd\u5f0f\u4f86\u53d6\u5f97\u7269\u4ef6\u7684\u5f31\u53c3\u7167\u975e\u5e38\u7c21\u55ae\u3002\u4ee5\u4e0b\u662f\u57fa\u672c\u7684\u4f7f\u7528\u65b9\u6cd5\uff1a<\/p>\n

“`python
\nimport weakref<\/p>\n

class SomeObject:
\n def __init__(self):
\n print(“SomeObject created”)<\/p>\n

def __del__(self):
\n print(“SomeObject deleted”)<\/p>\n

# \u5efa\u7acb\u4e00\u500b\u7269\u4ef6
\nobj = SomeObject()<\/p>\n

# \u53d6\u5f97\u7269\u4ef6\u7684\u5f31\u53c3\u7167
\nweak_ref = weakref.ref(obj)<\/p>\n

# \u4f7f\u7528\u5f31\u53c3\u7167
\nprint(weak_ref()) # \u8f38\u51fa: <__main__.SomeObject object at 0x...><\/p>\n

# \u522a\u9664\u5f37\u53c3\u7167
\ndel obj<\/p>\n

# \u6b64\u6642\u5f31\u53c3\u7167\u61c9\u8a72\u6703\u8fd4\u56de None
\nprint(weak_ref()) # \u8f38\u51fa: None
\n“`<\/p>\n

weakref() \u7684\u512a\u9ede\u8207\u61c9\u7528<\/h2>\n

\u4f7f\u7528 `weakref()` \u6709\u5e7e\u9805\u986f\u8457\u7684\u512a\u9ede\uff1a<\/p>\n

1. **\u907f\u514d\u8a18\u61b6\u9ad4\u6d29\u6f0f**\uff1a\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u7279\u5225\u662f\u7576\u7269\u4ef6\u4e4b\u9593\u5b58\u5728\u5faa\u74b0\u53c3\u7167\u6642\uff0c\u4f7f\u7528\u5f31\u53c3\u7167\u53ef\u4ee5\u5e6b\u52a9\u5783\u573e\u56de\u6536\u7cfb\u7d71\u6b63\u78ba\u91cb\u653e\u8a18\u61b6\u9ad4\u3002
\n2. **\u8f15\u91cf\u7d1a\u7684\u53c3\u8003**\uff1a\u5f31\u53c3\u7167\u4e0d\u6703\u589e\u52a0\u7269\u4ef6\u7684\u5f15\u7528\u8a08\u6578\uff0c\u56e0\u6b64\u5b83\u4e0d\u6703\u963b\u6b62\u7269\u4ef6\u7684\u56de\u6536\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u8655\u7406\u5927\u578b\u8cc7\u6599\u7d50\u69cb\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n

\u8209\u4f8b\u4f86\u8aaa\uff0c`weakref` \u53ef\u4ee5\u7528\u65bc\u5feb\u53d6\u7cfb\u7d71\uff0c\u7576\u5feb\u53d6\u7684\u7269\u4ef6\u4e0d\u518d\u88ab\u4f7f\u7528\u6642\uff0c\u5b83\u5011\u53ef\u4ee5\u81ea\u52d5\u88ab\u56de\u6536\u3002<\/p>\n

\u932f\u8aa4\u6392\u9664<\/h2>\n

\u5728\u4f7f\u7528 `weakref` \u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4ee5\u4e0b\u5e7e\u500b\u554f\u984c\uff1a<\/p>\n

– **None \u8fd4\u56de\u503c**\uff1a\u7576\u4f60\u5617\u8a66\u4f7f\u7528\u5f31\u53c3\u7167\u6642\uff0c\u5982\u679c\u539f\u59cb\u7269\u4ef6\u5df2\u7d93\u88ab\u522a\u9664\uff0c\u5247\u5f31\u53c3\u7167\u6703\u8fd4\u56de None\u3002\u9019\u4e26\u4e0d\u662f\u932f\u8aa4\uff0c\u800c\u662f\u5f31\u53c3\u7167\u7684\u6b63\u5e38\u884c\u70ba\u3002
\n– **\u5f37\u53c3\u7167\u672a\u6b63\u78ba\u6e05\u7406**\uff1a\u78ba\u4fdd\u6240\u6709\u5f37\u53c3\u7167\u5728\u4e0d\u9700\u8981\u6642\u88ab\u522a\u9664\uff0c\u5426\u5247\u5f31\u53c3\u7167\u5c07\u4e0d\u6703\u751f\u6548\u3002<\/p>\n

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

– **\u5feb\u53d6\u7cfb\u7d71**\uff1a\u4f7f\u7528 `weakref` \u53ef\u4ee5\u69cb\u5efa\u4e00\u500b\u81ea\u52d5\u7ba1\u7406\u7684\u5feb\u53d6\u7cfb\u7d71\uff0c\u78ba\u4fdd\u4e0d\u518d\u4f7f\u7528\u7684\u7269\u4ef6\u80fd\u88ab\u81ea\u52d5\u91cb\u653e\u3002
\n– **\u4e8b\u4ef6\u7cfb\u7d71**\uff1a\u5728\u8a2d\u8a08\u4e8b\u4ef6\u7cfb\u7d71\u6642\uff0c\u4f7f\u7528\u5f31\u53c3\u7167\u53ef\u4ee5\u907f\u514d\u7522\u751f\u610f\u5916\u7684\u5faa\u74b0\u53c3\u7167\uff0c\u5f9e\u800c\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n

\u7e3d\u7d50<\/h2>\n

Python \u4e2d\u7684 `weakref()` \u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u8b93\u4f60\u5728\u4e0d\u5f71\u97ff\u7269\u4ef6\u751f\u547d\u9031\u671f\u7684\u60c5\u6cc1\u4e0b\uff0c\u7372\u5f97\u7269\u4ef6\u7684\u5f31\u53c3\u7167\u3002\u9019\u4e0d\u50c5\u6709\u52a9\u65bc\u7ba1\u7406\u8a18\u61b6\u9ad4\uff0c\u9084\u80fd\u7c21\u5316\u7269\u4ef6\u4e4b\u9593\u7684\u95dc\u4fc2\u3002\u82e5\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc Python \u7684\u6559\u5b78\uff0c\u5efa\u8b70\u53c3\u8003 [\u9019\u7bc7\u6587\u7ae0](https:\/\/vocus.cc\/article\/5fda096cfd897800012e2b10) \u4f86\u9032\u4e00\u6b65\u63d0\u5347\u4f60\u7684\u6280\u80fd\u3002<\/p>\n

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

**Q1: \u4f7f\u7528 weakref() \u6642\uff0c\u6211\u9700\u8981\u7279\u5225\u6ce8\u610f\u4ec0\u9ebc\uff1f**
\nA1: \u4e3b\u8981\u662f\u78ba\u4fdd\u5f37\u53c3\u7167\u5728\u4e0d\u9700\u8981\u6642\u88ab\u6b63\u78ba\u522a\u9664\uff0c\u5426\u5247\u5f31\u53c3\u7167\u4e0d\u6703\u751f\u6548\u3002<\/p>\n

**Q2: weakref() \u6709\u54ea\u4e9b\u5e38\u898b\u7684\u4f7f\u7528\u6848\u4f8b\uff1f**
\nA2: \u901a\u5e38\u5728\u5feb\u53d6\u7cfb\u7d71\u548c\u4e8b\u4ef6\u76e3\u807d\u4e2d\u4f7f\u7528\uff0c\u4ee5\u9632\u6b62\u8a18\u61b6\u9ad4\u6d29\u6f0f\u548c\u5faa\u74b0\u53c3\u7167\u554f\u984c\u3002<\/p>\n

**Q3: \u5982\u4f55\u78ba\u8a8d\u5f31\u53c3\u7167\u662f\u5426\u4ecd\u7136\u6709\u6548\uff1f**
\nA3: \u4f60\u53ef\u4ee5\u76f4\u63a5\u8abf\u7528\u5f31\u53c3\u7167\u8fd4\u56de\u7684\u51fd\u5f0f\uff0c\u82e5\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\u597d\u5730\u7406\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-3172","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\/3172","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=3172"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3172\/revisions"}],"predecessor-version":[{"id":3173,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3172\/revisions\/3173"}],"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=3172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3172"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}