{"id":660,"date":"2026-03-11T14:27:00","date_gmt":"2026-03-11T06:27:00","guid":{"rendered":"https:\/\/mitongxue.cn\/?p=660"},"modified":"2026-07-14T14:45:44","modified_gmt":"2026-07-14T06:45:44","slug":"python-%e7%b1%bb%e7%bb%a7%e6%89%bf%e4%b8%admro","status":"publish","type":"post","link":"https:\/\/mitongxue.cn\/index.php\/2026\/03\/11\/python-%e7%b1%bb%e7%bb%a7%e6%89%bf%e4%b8%admro\/","title":{"rendered":"python \u7c7b\u7ee7\u627f\u4e2dMRO"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class Base(object):\n    def __init__(self):\n        print(\"enter Base\")\n        print(\"leave Base\")\n\nclass A(Base):\n    def __init__(self):\n        print(\"enter A\")\n        super().__init__()\n        print(\"leave A\")\n\nclass B(Base):\n    def __init__(self):\n        print(\"enter B\")\n        super().__init__()\n        print(\"leave B\")\n\nclass C(A, B):\n    def __init__(self):\n        print(\"enter C\")\n        super().__init__()\n        print(\"leave C\")\n\nc = C()\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>enter C\nenter A\nenter B\nenter Base\nleave Base\nleave B\nleave A\nleave C<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u5148\u67e5\u770b C \u7684 MRO \u7ee7\u627f\u94fe<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>print(C.__mro__)\n# \u8f93\u51fa\uff1a(&lt;class '__main__.C'&gt;, &lt;class '__main__.A'&gt;, &lt;class '__main__.B'&gt;, &lt;class '__main__.Base'&gt;, &lt;class 'object'&gt;)\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>super()<\/code> \u7684\u903b\u8f91\uff1a<strong>\u4e0d\u662f\u56fa\u5b9a\u627e\u76f4\u63a5\u7236\u7c7b\uff0c\u800c\u662f\u6cbf\u7740 MRO \u5217\u8868\u627e\u4e0b\u4e00\u4e2a\u7c7b<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u9010\u884c\u62c6\u89e3\u6267\u884c\u6d41\u7a0b<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>c = C()<\/code> \u2192 \u6267\u884c <code>C.__init__<\/code>\n<ul class=\"wp-block-list\">\n<li>\u6253\u5370 <code>enter C<\/code><\/li>\n\n\n\n<li><code>super().__init__()<\/code>\uff1aMRO \u4e2d C \u7684\u4e0b\u4e00\u4e2a\u662f A \u2192 \u8fdb\u5165 <code>A.__init__<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u6267\u884c <code>A.__init__<\/code>\n<ul class=\"wp-block-list\">\n<li>\u6253\u5370 <code>enter A<\/code><\/li>\n\n\n\n<li><code>super().__init__()<\/code>\uff1aMRO \u4e2d A \u7684\u4e0b\u4e00\u4e2a\u662f B \u2192 \u8fdb\u5165 <code>B.__init__<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u6267\u884c <code>B.__init__<\/code>\n<ul class=\"wp-block-list\">\n<li>\u6253\u5370 <code>enter B<\/code><\/li>\n\n\n\n<li><code>super().__init__()<\/code>\uff1aMRO \u4e2d B \u7684\u4e0b\u4e00\u4e2a\u662f Base \u2192 \u8fdb\u5165 <code>Base.__init__<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u6267\u884c <code>Base.__init__<\/code>\n<ul class=\"wp-block-list\">\n<li>\u6253\u5370 <code>enter Base<\/code><\/li>\n\n\n\n<li>\u6253\u5370 <code>leave Base<\/code> Base \u6ca1\u6709 super\uff0c\u672c\u5c42\u6784\u9020\u51fd\u6570\u7ed3\u675f\uff0c\u9010\u5c42\u56de\u9000<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u56de\u5230 B \u5269\u4f59\u4ee3\u7801\uff1a\u6253\u5370 <code>leave B<\/code><\/li>\n\n\n\n<li>\u56de\u5230 A \u5269\u4f59\u4ee3\u7801\uff1a\u6253\u5370 <code>leave A<\/code><\/li>\n\n\n\n<li>\u56de\u5230 C \u5269\u4f59\u4ee3\u7801\uff1a\u6253\u5370 <code>leave C<\/code><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u5173\u952e\u6613\u9519\u70b9\u533a\u5206<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5982\u679c\u4e0d\u7528 <code>super()<\/code>\uff0c\u624b\u52a8\u5199 <code>Base.__init__(self)<\/code>\uff1a A \u548c B \u90fd\u4f1a\u5355\u72ec\u8c03\u7528 Base\uff0cBase \u4f1a\u88ab\u6267\u884c\u4e24\u6b21\uff1b<\/li>\n\n\n\n<li><code>super()<\/code> \u4f9d\u9760 MRO \u4fdd\u8bc1<strong>\u516c\u5171\u7236\u7c7b Base \u53ea\u521d\u59cb\u5316\u4e00\u6b21<\/strong>\uff08\u94bb\u77f3\u7ee7\u627f\u95ee\u9898\u89e3\u51b3\u65b9\u6848\uff09\uff1b<\/li>\n\n\n\n<li>\u6253\u5370\u89c4\u5f8b\uff1a\u5148\u4ece\u4e0a\u5230\u4e0b\u300center\u300d\u8fdb\u5165\u5404\u4e2a\u5b50\u7c7b\uff0c\u518d\u4ece\u6700\u5e95\u5c42\u7236\u7c7b\u5f80\u56de\u9010\u5c42\u6253\u5370\u300cleave\u300d\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u7591\u95ee 1\uff1a\u4e3a\u4ec0\u4e48 A \u6ca1\u6709\u76f4\u63a5\u8fdb\u5165 Base\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a\u591a\u7ee7\u627f MRO \u91cd\u6392\u4e86\u7ee7\u627f\u987a\u5e8f\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>C(A,B)<\/code> \u7684 MRO \u662f <code>C,A,B,Base<\/code>\uff0c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 A \u4e2d\u5199 <code>super()<\/code>\uff0c\u89e3\u91ca\u5668\u53bb MRO \u627e A \u7684\u4e0b\u4e00\u4f4d\uff0c\u662f B\uff0c\u4e0d\u662f Base\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A \u6839\u672c\u4e0d\u4f1a\u76f4\u63a5\u8c03\u7528 Base\uff0c\u800c\u662f\u4ea4\u7ed9 B \u53bb\u6267\u884c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7591\u95ee 2\uff1a\u4e3a\u4ec0\u4e48 B \u6267\u884c\u5b8c Base\uff0cA \u5c31\u8ddf\u7740\u7ed3\u675f\u4e86\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A \u5185\u90e8\u903b\u8f91\u53ea\u6709\u4e09\u884c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>print(\"enter A\")\nsuper().__init__()  # \u6574\u6bb5B+Base\u7684\u903b\u8f91\u5168\u90e8\u5728\u8fd9\u91cc\u8dd1\u5b8c\nprint(\"leave A\")\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>super().__init__()<\/code> \u662f\u963b\u585e\u8c03\u7528\uff0c\u5fc5\u987b\u7b49\u5b83\u91cc\u9762\u6240\u6709\u5d4c\u5957\u4ee3\u7801\uff08B\u3001Base \u5168\u90e8\u6267\u884c\u5b8c\u3001\u5168\u90e8 return\uff09\uff0c\u624d\u4f1a\u6267\u884c\u4e0b\u4e00\u884c <code>print(\"leave A\")<\/code>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6d41\u7a0b\u7b49\u4ef7\u5d4c\u5957\u51fd\u6570\u8c03\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>C{\n  enter C\n  A{\n    enter A\n    B{\n      enter B\n      Base{\n        enter Base\n        leave Base\n      }\n      leave B\n    }\n    leave A\n  }\n  leave C\n}<\/code><\/pre>\n\n\n\n<h1 class=\"wp-block-heading\">\u5bf9\u6bd4\uff1a\u5982\u679c\u4e0d\u7528 super\uff0c\u624b\u52a8\u5199\u7236\u7c7b\u4f1a\u600e\u4e48\u6837\uff1f<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u5982 A \u91cc\u4e0d\u5199 super\uff0c\u76f4\u63a5\u786c\u7f16\u7801 <code>Base.__init__(self)<\/code>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class A(Base):\n    def __init__(self):\n        print(\"enter A\")\n        Base.__init__(self)\n        print(\"leave A\")\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6 A \u4f1a\u76f4\u63a5\u8c03\u7528 Base\uff0cB \u4e5f\u4f1a\u518d\u8c03\u7528\u4e00\u6b21 Base\uff0cBase \u6267\u884c\u4e24\u904d\uff0c\u8fd9\u5c31\u662f\u94bb\u77f3\u7ee7\u627f\u7684\u91cd\u590d\u521d\u59cb\u5316\u5751\uff0c<code>super()+MRO<\/code> \u5c31\u662f\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. \u5148\u67e5\u770b C \u7684 MRO \u7ee7\u627f\u94fe super(..<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[52,14],"tags":[],"class_list":["post-660","post","type-post","status-publish","format-standard","hentry","category-python","category-back"],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":""},"author_info":{"info":["\u9648 \u67d0\u4eba"]},"category_info":"<a href=\"https:\/\/mitongxue.cn\/index.php\/category\/back\/python\/\" rel=\"category tag\">Python<\/a> <a href=\"https:\/\/mitongxue.cn\/index.php\/category\/back\/\" rel=\"category tag\">\u540e\u7aef<\/a>","tag_info":"\u540e\u7aef","comment_count":"0","_links":{"self":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/660","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/comments?post=660"}],"version-history":[{"count":3,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/660\/revisions"}],"predecessor-version":[{"id":663,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/660\/revisions\/663"}],"wp:attachment":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/media?parent=660"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/categories?post=660"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/tags?post=660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}