{"id":3256,"date":"2025-05-29T16:14:03","date_gmt":"2025-06-04T08:27:02","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3256"},"modified":"2025-06-04T16:14:03","modified_gmt":"2025-06-04T08:27:02","slug":"%e4%ba%86%e8%a7%a3python%e4%b8%ad%e7%9a%84methodresolutionorder","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%ba%86%e8%a7%a3python%e4%b8%ad%e7%9a%84methodresolutionorder\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Python \u4e2d\u7684 Method Resolution Order\uff08MRO\uff09\uff1a2025 \u6700\u65b0\u6559\u5b78\u8207\u5be6\u4f5c"},"content":{"rendered":"

<\/p>\n

\u4ec0\u9ebc\u662f Python \u7684 Method Resolution Order\uff08MRO\uff09\uff1f<\/h1>\n

Python \u7684 Method Resolution Order\uff08MRO\uff09\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u641c\u5c0b\u9806\u5e8f\uff0c\u7528\u65bc\u78ba\u5b9a\u7279\u5b9a\u985e\u5225\u7684\u5c6c\u6027\u89e3\u6790\u9806\u5e8f\u3002\u9019\u4e00\u7b97\u6cd5\u5728 Python \u4e2d\u975e\u5e38\u91cd\u8981\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528\u591a\u91cd\u7e7c\u627f\u6642\uff0c\u5e6b\u52a9\u78ba\u4fdd\u5b50\u985e\u5225\u80fd\u6b63\u78ba\u7372\u53d6\u7236\u985e\u5225\u7684\u5c6c\u6027\u3002<\/p>\n

Python \u7684 Method Resolution Order \u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n

MRO \u7684\u5de5\u4f5c\u539f\u7406\u662f\u5f9e\u4e00\u500b\u985e\u5225\u958b\u59cb\uff0c\u6309\u7167\u7e7c\u627f\u7684\u9806\u5e8f\u641c\u5c0b\u985e\u5225\u7684\u5c6c\u6027\u3002\u7576\u4e00\u500b\u985e\u5225\u9700\u8981\u7372\u53d6\u67d0\u500b\u5c6c\u6027\u6642\uff0cMRO \u6703\u512a\u5148\u641c\u5c0b\u8a72\u985e\u5225\u672c\u8eab\u7684\u5c6c\u6027\uff0c\u7136\u5f8c\u4f9d\u6b21\u641c\u5c0b\u5176\u7236\u985e\u5225\u7684\u5c6c\u6027\u3002\u9019\u6a23\u7684\u8a2d\u8a08\u78ba\u4fdd\u4e86\u5728\u591a\u91cd\u7e7c\u627f\u7684\u60c5\u6cc1\u4e0b\uff0c\u5c6c\u6027\u7684\u89e3\u6790\u662f\u53ef\u9810\u6e2c\u7684\u3002<\/p>\n

\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u985e\u5225 A \u548c\u985e\u5225 B\uff0cB \u7e7c\u627f\u81ea A\uff0c\u90a3\u9ebc MRO \u5c07\u6703\u5148\u641c\u5c0b\u985e\u5225 B \u7684\u5c6c\u6027\uff0c\u7136\u5f8c\u518d\u641c\u5c0b\u985e\u5225 A \u7684\u5c6c\u6027\u3002<\/p>\n

\u5982\u4f55\u67e5\u8a62 MRO\uff1f<\/h2>\n

\u5728 Python \u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 `__mro__` \u5c6c\u6027\u4f86\u67e5\u8a62\u985e\u5225\u7684 MRO\u3002\u9019\u500b\u5c6c\u6027\u8fd4\u56de\u4e00\u500b\u5143\u7d44\uff0c\u5305\u542b\u4e86\u6309\u7167\u641c\u5c0b\u9806\u5e8f\u6392\u5217\u7684\u985e\u5225\u3002<\/p>\n

“`python
\nprint(D.__mro__)
\n“`<\/p>\n

\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5c07\u6703\u8f38\u51fa\u985e\u5225 D \u7684 MRO\u3002<\/p>\n

Python \u7684 Method Resolution Order \u7684\u7a0b\u5f0f\u78bc\u7bc4\u4f8b<\/h2>\n

\u4e0b\u9762\u662f\u4e00\u500b\u7c21\u55ae\u7684 Python \u7a0b\u5f0f\u78bc\u7bc4\u4f8b\uff0c\u7528\u65bc\u6f14\u793a MRO \u7684\u5de5\u4f5c\u539f\u7406\uff1a<\/p>\n

“`python
\nclass A:
\n def do_something(self):
\n print(“Doing something in A”)<\/p>\n

class B(A):
\n def do_something(self):
\n print(“Doing something in B”)<\/p>\n

class C(A):
\n def do_something(self):
\n print(“Doing something in C”)<\/p>\n

class D(B, C):
\n pass<\/p>\n

d = D()
\nd.do_something() # \u8f38\u51fa\uff1aDoing something in B
\nprint(D.__mro__) # \u8f38\u51fa MRO
\n“`<\/p>\n

\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u56db\u500b\u985e\u5225\uff1aA\u3001B\u3001C \u548c D\u3002\u985e\u5225 D \u7e7c\u627f\u81ea\u985e\u5225 B \u548c C\uff0c\u800c\u985e\u5225 B \u548c C \u53c8\u5404\u81ea\u7e7c\u627f\u81ea\u985e\u5225 A\u3002\u7576\u6211\u5011\u5efa\u7acb\u4e00\u500b D \u985e\u5225\u7684\u5c0d\u8c61\u4e26\u8abf\u7528 `d.do_something()` \u65b9\u6cd5\u6642\uff0cMRO \u5c07\u6703\u512a\u5148\u641c\u5c0b\u985e\u5225 B \u7684\u5c6c\u6027\uff0c\u7136\u5f8c\u518d\u641c\u5c0b\u985e\u5225 C \u7684\u5c6c\u6027\uff0c\u6700\u5f8c\u518d\u641c\u5c0b\u985e\u5225 A \u7684\u5c6c\u6027\u3002<\/p>\n

\u932f\u8aa4\u6392\u9664\u8207\u5e38\u898b\u554f\u984c<\/h2>\n

\u5728\u4f7f\u7528 MRO \u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u5e38\u898b\u7684\u554f\u984c\uff0c\u4f8b\u5982\uff1a<\/p>\n

– **\u554f\u984c**\uff1a\u985e\u5225\u5c6c\u6027\u6c92\u6709\u6309\u7167\u9810\u671f\u7684\u9806\u5e8f\u88ab\u89e3\u6790\u3002
\n– **\u89e3\u6c7a\u65b9\u6848**\uff1a\u6aa2\u67e5\u7e7c\u627f\u9806\u5e8f\u53ca MRO \u662f\u5426\u6b63\u78ba\uff0c\u53ef\u4ee5\u4f7f\u7528 `print(ClassName.__mro__)` \u4f86\u78ba\u8a8d\u3002<\/p>\n

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

MRO \u4e0d\u50c5\u9650\u65bc\u65b9\u6cd5\u89e3\u6790\uff0c\u9084\u53ef\u4ee5\u7528\u65bc\u89e3\u6c7a\u5c6c\u6027\u548c\u65b9\u6cd5\u7684\u885d\u7a81\uff0c\u7279\u5225\u662f\u5728\u591a\u91cd\u7e7c\u627f\u7684\u60c5\u6cc1\u4e0b\u3002\u5b78\u7fd2\u548c\u7406\u89e3 MRO \u5c0d\u65bc\u8a2d\u8a08\u8907\u96dc\u7684\u985e\u5225\u7d50\u69cb\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n

\u5982\u679c\u4f60\u60f3\u6df1\u5165\u4e86\u89e3 Python \u7684\u7e7c\u627f\u6a5f\u5236\u53ca\u6700\u4f73\u5be6\u8e10\uff0c\u8acb\u53c3\u8003\u9019\u7bc7\u6587\u7ae0\uff1a[Python \u7e7c\u627f\u8207\u591a\u91cd\u7e7c\u627f\u6559\u5b78](https:\/\/vocus.cc\/article\/63f3a03b9c4f826c5a9f01a1)\u3002<\/p>\n

\u7e3d\u7d50<\/h2>\n

Python \u7684 Method Resolution Order\uff08MRO\uff09\u662f\u7406\u89e3 Python \u7e7c\u627f\u548c\u5c6c\u6027\u89e3\u6790\u7684\u95dc\u9375\u3002\u900f\u904e MRO\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u78ba\u4fdd\u5728\u591a\u91cd\u7e7c\u627f\u7684\u60c5\u6cc1\u4e0b\uff0c\u5b50\u985e\u5225\u80fd\u6b63\u78ba\u7372\u53d6\u7236\u985e\u5225\u7684\u5c6c\u6027\uff0c\u5f9e\u800c\u907f\u514d\u6f5b\u5728\u7684\u932f\u8aa4\u8207\u6df7\u6dc6\u3002<\/p>\n

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

**Q1: MRO \u662f\u4ec0\u9ebc\uff1f**
\nA1: MRO\uff08Method Resolution Order\uff09\u662f Python \u4e2d\u7528\u65bc\u78ba\u5b9a\u985e\u5225\u5c6c\u6027\u89e3\u6790\u9806\u5e8f\u7684\u4e00\u7a2e\u7b97\u6cd5\uff0c\u5c24\u5176\u5728\u591a\u91cd\u7e7c\u627f\u6642\u975e\u5e38\u91cd\u8981\u3002<\/p>\n

**Q2: \u5982\u4f55\u67e5\u8a62\u4e00\u500b\u985e\u5225\u7684 MRO\uff1f**
\nA2: \u53ef\u4ee5\u4f7f\u7528 `ClassName.__mro__` \u5c6c\u6027\u4f86\u67e5\u8a62\u4e00\u500b\u985e\u5225\u7684 MRO\uff0c\u9019\u5c07\u8fd4\u56de\u4e00\u500b\u5143\u7d44\uff0c\u986f\u793a\u985e\u5225\u7684\u89e3\u6790\u9806\u5e8f\u3002<\/p>\n

**Q3: \u5982\u679c MRO \u7684\u9806\u5e8f\u4e0d\u7b26\u5408\u9810\u671f\uff0c\u6211\u8a72\u600e\u9ebc\u8fa6\uff1f**
\nA3: \u6aa2\u67e5\u985e\u5225\u7684\u7e7c\u627f\u9806\u5e8f\uff0c\u4e26\u4f7f\u7528 `print(ClassName.__mro__)` \u4f86\u78ba\u8a8d MRO \u7684\u6b63\u78ba\u6027\uff0c\u5fc5\u8981\u6642\u91cd\u65b0\u8a2d\u8a08\u985e\u5225\u7684\u7e7c\u627f\u7d50\u69cb\u3002<\/p>\n

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

MethodResolutionOrder\uff08MRO\uff09\u662fPython\u4e2d\u7528\u65bc\u6c7a\u5b9a\u7269\u4ef6\u5c6c\u6027\u641c\u7d22\u9806\u5e8f\u7684\u4e00\u7a2e\u6a5f\u5236\u3002MRO\u662f\u4e00\u7a2e\u6df1\u5ea6\u512a\u5148\u641c\u7d22\u7b97\u6cd5\uff0c\u5b83\u6703\u6309\u7167\u7279\u5b9a\u7684\u9806\u5e8f\u641c\u7d22\u7269\u4ef6\u7684\u5c6c\u6027\uff0c\u4ee5\u78ba\u4fdd\u7269\u4ef6\u7684\u5c6c\u6027\u641c\u7d22\u9806\u5e8f\u662f\u6b63\u78ba\u7684\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39Python\u4e2dMRO\u7684\u6982\u5ff5\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u6c7a\u5b9a\u7269\u4ef6\u5c6c\u6027\u641c\u7d22\u9806\u5e8f\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-3256","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-Qw","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3256","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=3256"}],"version-history":[{"count":2,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3256\/revisions"}],"predecessor-version":[{"id":12888,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3256\/revisions\/12888"}],"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=3256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}