{"id":3528,"date":"2025-05-28T14:18:42","date_gmt":"2025-06-04T07:18:42","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3528"},"modified":"2025-06-04T14:18:42","modified_gmt":"2025-06-04T07:18:42","slug":"%e4%ba%86%e8%a7%a3python%e4%b8%adsubclasscheck%e5%87%bd%e6%95%b8%e7%9a%84%e5%8a%9f%e8%83%bd%e8%88%87%e6%87%89%e7%94%a8","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%ba%86%e8%a7%a3python%e4%b8%adsubclasscheck%e5%87%bd%e6%95%b8%e7%9a%84%e5%8a%9f%e8%83%bd%e8%88%87%e6%87%89%e7%94%a8\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Python \u4e2d\u7684 `issubclass()` \u51fd\u6578\uff1a\u529f\u80fd\u3001\u61c9\u7528\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

<\/p>\n

Python \u4e2d\u7684 `issubclass()` \u51fd\u6578<\/h1>\n

\u5728 Python \u4e2d\uff0c`issubclass()` \u51fd\u6578\u662f\u4e00\u500b\u7528\u4f86\u6aa2\u67e5\u5b50\u985e\u5225\u8207\u7236\u985e\u5225\u4e4b\u9593\u95dc\u4fc2\u7684\u5167\u5efa\u51fd\u5f0f\u3002\u5b83\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u4e00\u500b\u985e\u5225\u662f\u5426\u7e7c\u627f\u81ea\u53e6\u4e00\u500b\u985e\u5225\uff0c\u6216\u8005\u6aa2\u67e5\u4e00\u500b\u7269\u4ef6\u662f\u5426\u662f\u67d0\u500b\u985e\u5225\u7684\u5be6\u4f8b\u3002\u9019\u5c0d\u65bc\u7269\u4ef6\u5c0e\u5411\u7a0b\u5f0f\u8a2d\u8a08\u7684\u6982\u5ff5\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u70ba\u5b83\u5e6b\u52a9\u6211\u5011\u7406\u89e3\u985e\u5225\u4e4b\u9593\u7684\u7e7c\u627f\u7d50\u69cb\u3002<\/p>\n

> **\u6ce8\u610f**: \u5728\u9019\u88e1\u6211\u5011\u4f7f\u7528 `issubclass()` \u800c\u975e `subclasscheck()`\uff0c\u56e0\u70ba `issubclass()` \u662f Python \u5167\u5efa\u7684\u6b63\u78ba\u51fd\u6578\u540d\u7a31\u3002<\/p>\n

## \u8a9e\u6cd5<\/p>\n

`issubclass()` \u51fd\u5f0f\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

“`python
\nissubclass(subclass, classinfo)
\n“`<\/p>\n

– `subclass`\uff1a\u8981\u6aa2\u67e5\u7684\u5b50\u985e\u5225\u3002
\n– `classinfo`\uff1a\u8981\u6aa2\u67e5\u7684\u7236\u985e\u5225\u6216\u985e\u5225\u5143\u7d44\u3002\u5982\u679c\u5b50\u985e\u5225\u662f\u7236\u985e\u5225\u7684\u76f4\u63a5\u6216\u9593\u63a5\u5b50\u985e\u5225\uff0c\u5247\u51fd\u5f0f\u6703\u8fd4\u56de `True`\uff0c\u5426\u5247\u8fd4\u56de `False`\u3002<\/p>\n

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

### \u6aa2\u67e5\u985e\u5225\u7e7c\u627f<\/p>\n

\u8209\u500b\u4f8b\u5b50\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u985e\u5225 `A`\uff0c\u4ee5\u53ca\u4e00\u500b\u7e7c\u627f\u81ea `A` \u7684\u5b50\u985e\u5225 `B`\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 `issubclass()` \u51fd\u5f0f\u4f86\u6aa2\u67e5 `B` \u662f\u5426\u7e7c\u627f\u81ea `A`\uff1a<\/p>\n

“`python
\nclass A:
\n pass<\/p>\n

class B(A):
\n pass<\/p>\n

print(issubclass(B, A)) # \u8f38\u51fa: True
\n“`<\/p>\n

\u57f7\u884c\u7d50\u679c\u6703\u986f\u793a `True`\uff0c\u8868\u793a `B` \u78ba\u5be6\u7e7c\u627f\u81ea `A`\u3002<\/p>\n

### \u6aa2\u67e5\u7269\u4ef6\u5be6\u4f8b<\/p>\n

`issubclass()` \u51fd\u5f0f\u4e5f\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u4e00\u500b\u7269\u4ef6\u662f\u5426\u662f\u67d0\u500b\u985e\u5225\u7684\u5be6\u4f8b\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u7269\u4ef6 `obj`\uff0c\u5b83\u662f\u7531\u985e\u5225 `A` \u5efa\u7acb\u7684\uff1a<\/p>\n

“`python
\nclass A:
\n pass<\/p>\n

obj = A()<\/p>\n

# \u4f7f\u7528 type() \u6aa2\u67e5\u7269\u4ef6\u7684\u985e\u5225
\nprint(issubclass(type(obj), A)) # \u8f38\u51fa: True
\n“`<\/p>\n

\u57f7\u884c\u7d50\u679c\u6703\u986f\u793a `True`\uff0c\u8868\u793a `obj` \u78ba\u5be6\u662f `A` \u985e\u5225\u7684\u5be6\u4f8b\u3002<\/p>\n

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

\u5728\u4f7f\u7528 `issubclass()` \u51fd\u6578\u6642\uff0c\u5982\u679c\u50b3\u5165\u7684\u53c3\u6578\u4e0d\u662f\u985e\u5225\uff0c\u5247\u6703\u5f15\u767c `TypeError`\u3002\u4f8b\u5982\uff1a<\/p>\n

“`python
\n# \u932f\u8aa4\u7bc4\u4f8b
\ntry:
\n print(issubclass(obj, A)) # \u9019\u88e1\u6703\u5f15\u767c\u932f\u8aa4
\nexcept TypeError as e:
\n print(f”\u767c\u751f\u932f\u8aa4: {e}”)
\n“`<\/p>\n

\u9019\u6bb5\u7a0b\u5f0f\u78bc\u6703\u986f\u793a\u932f\u8aa4\u8a0a\u606f\uff0c\u56e0\u70ba `obj` \u4e0d\u662f\u4e00\u500b\u985e\u5225\u3002<\/p>\n

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

`issubclass()` \u51fd\u6578\u5728\u591a\u578b\u6027\u548c\u7e7c\u627f\u7684\u74b0\u5883\u4e2d\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u7576\u8a2d\u8a08\u4e00\u500b\u51fd\u6578\u4f86\u8655\u7406\u591a\u7a2e\u985e\u5225\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528 `issubclass()` \u4f86\u78ba\u4fdd\u50b3\u5165\u7684\u985e\u5225\u7b26\u5408\u9810\u671f\u7684\u7d50\u69cb\u3002<\/p>\n

\u4e86\u89e3\u9019\u4e9b\u6982\u5ff5\u5f8c\uff0c\u60a8\u53ef\u4ee5\u53c3\u8003\u9019\u7bc7[Python \u985e\u5225\u8207\u7e7c\u627f\u7684\u6df1\u5165\u89e3\u6790](https:\/\/vocus.cc\/article\/5f3a0365fd89780001d6eeb2)\u4f86\u9032\u4e00\u6b65\u52a0\u6df1\u60a8\u7684\u7406\u89e3\u3002<\/p>\n

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

`issubclass()` \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u6aa2\u67e5\u985e\u5225\u4e4b\u9593\u7684\u7e7c\u627f\u95dc\u4fc2\uff0c\u7279\u5225\u662f\u5728\u7269\u4ef6\u5c0e\u5411\u7a0b\u5f0f\u8a2d\u8a08\u4e2d\u3002\u638c\u63e1\u9019\u500b\u51fd\u6578\u7684\u4f7f\u7528\uff0c\u80fd\u8b93\u60a8\u7684 Python \u7de8\u7a0b\u66f4\u52a0\u9748\u6d3b\u8207\u9ad8\u6548\u3002<\/p>\n

—<\/p>\n

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

**Q1: `issubclass()` \u548c `isinstance()` \u6709\u4ec0\u9ebc\u5340\u5225\uff1f**
\nA1: `issubclass()` \u7528\u65bc\u6aa2\u67e5\u985e\u5225\u4e4b\u9593\u7684\u7e7c\u627f\u95dc\u4fc2\uff0c\u800c `isinstance()` \u7528\u65bc\u6aa2\u67e5\u7269\u4ef6\u662f\u5426\u662f\u67d0\u500b\u985e\u5225\u7684\u5be6\u4f8b\u3002<\/p>\n

**Q2: \u6211\u53ef\u4ee5\u4f7f\u7528 `issubclass()` \u6aa2\u67e5\u591a\u500b\u7236\u985e\u5225\u55ce\uff1f**
\nA2: \u662f\u7684\uff0c\u60a8\u53ef\u4ee5\u5c07\u591a\u500b\u985e\u5225\u653e\u5165\u4e00\u500b\u5143\u7d44\u4e2d\uff0c\u4f5c\u70ba `classinfo` \u53c3\u6578\u50b3\u905e\u7d66 `issubclass()` \u51fd\u6578\u3002<\/p>\n

**Q3: \u5982\u679c\u50b3\u5165\u7684\u985e\u5225\u4e0d\u5b58\u5728\uff0c\u6703\u767c\u751f\u4ec0\u9ebc\uff1f**
\nA3: \u5982\u679c\u50b3\u5165\u7684\u985e\u5225\u4e0d\u5b58\u5728\uff0c\u5c07\u6703\u5f15\u767c `NameError`\uff0c\u56e0\u6b64\u5728\u4f7f\u7528\u4e4b\u524d\u8acb\u78ba\u8a8d\u985e\u5225\u5df2\u6b63\u78ba\u5b9a\u7fa9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e86\u89e3Python\u4e2dsubclasscheck()\u51fd\u6578\u7684\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u6aa2\u67e5\u4e00\u500b\u7269\u4ef6\u662f\u5426\u70ba\u53e6\u4e00\u500b\u7269\u4ef6\u7684\u5b50\u985e\u5225\uff0c\u4e26\u63d0\u4f9b\u4e00\u500b\u7c21\u55ae\u7684\u65b9\u6cd5\u4f86\u6aa2\u67e5\u7269\u4ef6\u4e4b\u9593\u7684\u95dc\u4fc2\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39subclasscheck()\u51fd\u6578\u7684\u529f\u80fd\u8207\u61c9\u7528\uff0c\u8b93\u4f60\u66f4\u52a0\u4e86\u89e3Python\u4e2d\u7684subclasscheck()\u51fd\u6578\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-3528","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-UU","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3528","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=3528"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3528\/revisions"}],"predecessor-version":[{"id":3529,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3528\/revisions\/3529"}],"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=3528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3528"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}