{"id":2898,"date":"2025-05-31T17:12:40","date_gmt":"2025-06-04T09:27:39","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=2898"},"modified":"2025-06-04T17:12:40","modified_gmt":"2025-06-04T09:27:39","slug":"python%e4%b8%ad%e7%9a%84del%e5%87%bd%e6%95%b8%ef%bc%9a%e6%b8%85%e7%90%86%e5%af%a6%e4%be%8b%e7%9a%84%e5%bf%85%e8%a6%81%e5%b7%a5%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/python%e4%b8%ad%e7%9a%84del%e5%87%bd%e6%95%b8%ef%bc%9a%e6%b8%85%e7%90%86%e5%af%a6%e4%be%8b%e7%9a%84%e5%bf%85%e8%a6%81%e5%b7%a5%e4%bd%9c\/","title":{"rendered":"Python\u4e2d\u7684`__del__()`\u65b9\u6cd5\uff1a\u9ad8\u6548\u6e05\u7406\u985e\u7684\u5be6\u4f8b\u8cc7\u6e90"},"content":{"rendered":"

<\/p>\n

\u5728Python\u7de8\u7a0b\u4e2d\uff0c`__del__()`\u65b9\u6cd5\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u5728\u985e\u7684\u5be6\u4f8b\u88ab\u522a\u9664\u6642\u81ea\u52d5\u57f7\u884c\u5fc5\u8981\u7684\u6e05\u7406\u5de5\u4f5c\u3002\u9019\u4e00\u65b9\u6cd5\u5c0d\u65bc\u91cb\u653e\u8cc7\u6e90\u3001\u6e05\u7406\u5783\u573e\u6216\u57f7\u884c\u5176\u4ed6\u4efb\u4f55\u6e05\u7406\u4efb\u52d9\u81f3\u95dc\u91cd\u8981\u3002\u96a8\u8457Python\u7684\u6301\u7e8c\u767c\u5c55\uff0c\u4e86\u89e3\u5982\u4f55\u6b63\u78ba\u4f7f\u7528`__del__()`\u65b9\u6cd5\u8b8a\u5f97\u6108\u52a0\u91cd\u8981\u3002<\/p>\n

## `__del__()`\u65b9\u6cd5\u7684\u57fa\u672c\u4f7f\u7528<\/p>\n

\u4f7f\u7528`__del__()`\u65b9\u6cd5\u975e\u5e38\u7c21\u55ae\uff0c\u53ea\u9700\u5728\u985e\u4e2d\u5b9a\u7fa9\u5b83\u5373\u53ef\u3002\u7576\u985e\u7684\u5be6\u4f8b\u88ab\u522a\u9664\u6642\uff0cPython\u7684\u5783\u573e\u6536\u96c6\u5668\u6703\u81ea\u52d5\u8abf\u7528\u9019\u500b\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u5728\u81ea\u5b9a\u7fa9\u985e\u4e2d\u4f7f\u7528`__del__()`\u65b9\u6cd5\uff1a<\/p>\n

“`python
\nclass MyClass:
\n def __init__(self):
\n # \u521d\u59cb\u5316\u985e\u7684\u5be6\u4f8b
\n print(“\u5be6\u4f8b\u88ab\u5275\u5efa\uff01”)<\/p>\n

def __del__(self):
\n # \u57f7\u884c\u6e05\u7406\u5de5\u4f5c
\n print(“\u5be6\u4f8b\u88ab\u522a\u9664\uff0c\u57f7\u884c\u6e05\u7406\u5de5\u4f5c\uff01”)
\n“`<\/p>\n

\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u7576`MyClass`\u7684\u5be6\u4f8b\u88ab\u522a\u9664\u6642\uff0c`__del__()`\u65b9\u6cd5\u6703\u81ea\u52d5\u57f7\u884c\uff0c\u4e26\u6253\u5370\u51fa\u76f8\u61c9\u7684\u4fe1\u606f\u3002\u9019\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u8ddf\u8e64\u5be6\u4f8b\u7684\u751f\u547d\u9031\u671f\u3002<\/p>\n

## `__del__()`\u65b9\u6cd5\u7684\u512a\u9ede\u8207\u6700\u4f73\u5be6\u8e10<\/p>\n

`__del__()`\u65b9\u6cd5\u7684\u4e00\u5927\u512a\u9ede\u662f\u5b83\u5141\u8a31\u958b\u767c\u8005\u5728\u5be6\u4f8b\u88ab\u522a\u9664\u6642\u81ea\u52d5\u57f7\u884c\u6e05\u7406\u5de5\u4f5c\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u624b\u52d5\u7ba1\u7406\u8cc7\u6e90\u7684\u9700\u6c42\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528`__del__()`\u7684\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n

1. **\u91cb\u653e\u8cc7\u6e90**\uff1a\u5728`__del__()`\u4e2d\u91cb\u653e\u5982\u6587\u4ef6\u53e5\u67c4\u3001\u7db2\u7d61\u9023\u63a5\u3001\u6578\u64da\u5eab\u9023\u63a5\u7b49\u8cc7\u6e90\uff0c\u4ee5\u907f\u514d\u8cc7\u6e90\u6d29\u6f0f\u3002
\n2. **\u907f\u514d\u5faa\u74b0\u5f15\u7528**\uff1a\u96d6\u7136Python\u7684\u5783\u573e\u6536\u96c6\u5668\u80fd\u8655\u7406\u5927\u591a\u6578\u60c5\u6cc1\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u5faa\u74b0\u5f15\u7528\u6703\u5c0e\u81f4`__del__()`\u7121\u6cd5\u88ab\u8abf\u7528\u3002\u53ef\u4ee5\u8003\u616e\u4f7f\u7528`weakref`\u6a21\u7d44\u4f86\u907f\u514d\u6b64\u554f\u984c\u3002
\n3. **\u65e5\u8a8c\u8a18\u9304**\uff1a\u5728`__del__()`\u4e2d\u6dfb\u52a0\u65e5\u8a8c\u8a18\u9304\u529f\u80fd\uff0c\u4ee5\u4fbf\u65bc\u8ffd\u8e64\u5c0d\u8c61\u7684\u522a\u9664\u548c\u8cc7\u6e90\u91cb\u653e\u3002<\/p>\n

## \u9032\u968e\u61c9\u7528\u793a\u4f8b<\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u500b\u9032\u968e\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728`__del__()`\u4e2d\u91cb\u653e\u8cc7\u6e90\uff1a<\/p>\n

“`python
\nimport sqlite3<\/p>\n

class DatabaseConnection:
\n def __init__(self, db_name):
\n self.connection = sqlite3.connect(db_name)
\n print(“\u6578\u64da\u5eab\u9023\u63a5\u5df2\u5efa\u7acb\u3002”)<\/p>\n

def __del__(self):
\n self.connection.close()
\n print(“\u6578\u64da\u5eab\u9023\u63a5\u5df2\u95dc\u9589\u3002”)<\/p>\n

# \u4f7f\u7528\u793a\u4f8b
\ndb = DatabaseConnection(‘example.db’)
\n# \u5728\u6b64\u8655\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c
\ndel db # \u5c07\u89f8\u767c __del__() \u65b9\u6cd5\uff0c\u95dc\u9589\u9023\u63a5
\n“`<\/p>\n

\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u7576`DatabaseConnection`\u7684\u5be6\u4f8b\u88ab\u522a\u9664\u6642\uff0c`__del__()`\u6703\u81ea\u52d5\u95dc\u9589\u6578\u64da\u5eab\u9023\u63a5\uff0c\u78ba\u4fdd\u8cc7\u6e90\u4e0d\u88ab\u6d6a\u8cbb\u3002<\/p>\n

## \u7e3d\u7d50<\/p>\n

Python\u7684`__del__()`\u65b9\u6cd5\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u5728\u985e\u7684\u5be6\u4f8b\u88ab\u522a\u9664\u6642\u81ea\u52d5\u57f7\u884c\u5fc5\u8981\u7684\u6e05\u7406\u5de5\u4f5c\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528\u6b64\u65b9\u6cd5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u8cc7\u6e90\uff0c\u907f\u514d\u6f5b\u5728\u7684\u8cc7\u6e90\u6d29\u6f0f\u6216\u5176\u4ed6\u554f\u984c\u3002\u5982\u679c\u4f60\u5c0dPython\u7684\u8cc7\u6e90\u7ba1\u7406\u6709\u66f4\u6df1\u5165\u7684\u8208\u8da3\uff0c\u5efa\u8b70\u53c3\u8003 [\u9019\u7bc7\u6587\u7ae0](https:\/\/vocus.cc\/article\/64c0e3edfd89780001971c9c) \u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n

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

**Q1: `__del__()`\u65b9\u6cd5\u5728\u4ec0\u9ebc\u6642\u5019\u88ab\u8abf\u7528\uff1f**
\nA1: \u7576\u4e00\u500b\u5c0d\u8c61\u7684\u5f15\u7528\u8a08\u6578\u964d\u70ba\u96f6\u6642\uff0cPython\u7684\u5783\u573e\u56de\u6536\u6a5f\u5236\u6703\u81ea\u52d5\u8abf\u7528`__del__()`\u65b9\u6cd5\u3002<\/p>\n

**Q2: `__del__()`\u662f\u5426\u4e00\u5b9a\u6703\u88ab\u8abf\u7528\uff1f**
\nA2: \u5728\u6b63\u5e38\u60c5\u6cc1\u4e0b\uff0c`__del__()`\u6703\u88ab\u8abf\u7528\uff0c\u4f46\u5728\u5faa\u74b0\u5f15\u7528\u6216\u8005\u7a0b\u5e8f\u7570\u5e38\u7d42\u6b62\u7684\u60c5\u6cc1\u4e0b\u53ef\u80fd\u4e0d\u6703\u88ab\u89f8\u767c\u3002<\/p>\n

**Q3: \u4f7f\u7528`__del__()`\u7684\u6700\u4f73\u5be6\u8e10\u662f\u4ec0\u9ebc\uff1f**
\nA3: \u5728`__del__()`\u4e2d\u91cb\u653e\u8cc7\u6e90\u4e26\u907f\u514d\u5faa\u74b0\u5f15\u7528\u662f\u6700\u4f73\u5be6\u8e10\u3002\u6b64\u5916\uff0c\u8003\u616e\u4f7f\u7528\u4e0a\u4e0b\u6587\u7ba1\u7406\u5668\uff08`with`\u8a9e\u53e5\uff09\u4f86\u7ba1\u7406\u8cc7\u6e90\uff0c\u9019\u6a23\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u8cc7\u6e90\u7684\u91cb\u653e\u3002
\n—<\/p>\n","protected":false},"excerpt":{"rendered":"

del()\u51fd\u6578\u662fPython\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u51fd\u6578\uff0c\u5b83\u53ef\u4ee5\u5728\u985e\u7684\u5be6\u4f8b\u88ab\u522a\u9664\u6642\u57f7\u884c\u5fc5\u8981\u7684\u6e05\u7406\u5de5\u4f5c\uff0c\u4ee5\u78ba\u4fdd\u7a0b\u5e8f\u7684\u6b63\u78ba\u904b\u884c\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39del()\u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4ee5\u53ca\u5b83\u5728Python\u7a0b\u5e8f\u4e2d\u7684\u91cd\u8981\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-2898","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-KK","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2898","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=2898"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2898\/revisions"}],"predecessor-version":[{"id":2899,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2898\/revisions\/2899"}],"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=2898"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=2898"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=2898"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}