{"id":204714,"date":"2025-05-29T15:06:33","date_gmt":"2025-05-29T07:06:33","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204714\/"},"modified":"2025-05-29T15:06:33","modified_gmt":"2025-05-29T07:06:33","slug":"python%e4%b8%ad%e5%a6%82%e4%bd%95%e4%bc%98%e9%9b%85%e5%9c%b0%e8%a7%a3%e5%86%b3%e5%a4%9a%e9%87%8d%e7%bb%a7%e6%89%bf%e4%bf%ae%e6%94%b9%e7%b1%bb%e5%9e%8b%e7%b1%bb%e7%9a%84%e9%97%ae%e9%a2%98%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204714\/","title":{"rendered":"Python\u4e2d\u5982\u4f55\u4f18\u96c5\u5730\u89e3\u51b3\u591a\u91cd\u7ee7\u627f\u4fee\u6539\u7c7b\u578b\u7c7b\u7684\u95ee\u9898\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Python\u4e2d\u5982\u4f55\u4f18\u96c5\u5730\u89e3\u51b3\u591a\u91cd\u7ee7\u627f\u4fee\u6539\u7c7b\u578b\u7c7b\u7684\u95ee\u9898\uff1f<\/h1>\n<p>IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300aPython\u4e2d\u5982\u4f55\u4f18\u96c5\u5730\u89e3\u51b3\u591a\u91cd\u7ee7\u627f\u4fee\u6539\u7c7b\u578b\u7c7b\u7684\u95ee\u9898\uff1f\u300b\uff0c\u804a\u804a\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241114\/1731565297673596f1dd978.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u4fee\u6539\u5bfc\u5165\u7c7b\u7684\u7c7b\u578b<\/strong><\/p>\n<p>\u5728 python \u4e2d\uff0c\u901a\u8fc7\u591a\u91cd\u7ee7\u627f\u53ef\u4ee5\u5c06\u7c7b\u578b\u7c7b\u4f5c\u4e3a\u5b50\u7c7b\u7684\u7b2c\u4e8c\u4e2a\u7236\u7c7b\uff0c\u4ece\u800c\u521b\u5efa\u5177\u6709\u7c7b\u578b\u63d0\u793a\u7684\u6307\u9488\u3002\u7136\u800c\uff0c\u5728\u5b9e\u4f8b\u5316\u65f6\uff0c\u91cd\u65b0\u751f\u6210\u4e00\u4e2a\u7c7b\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5b9e\u4f8b\u7684\u7c7b\u578b\u4e0e\u8be5\u7c7b\u4e0d\u540c\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6848<\/strong><\/p>\n<p>\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u53ef\u4ee5\u4f7f\u7528 __init_subclass__ \u65b9\u6cd5\uff0c\u800c\u4e0d\u662f __new__ \u65b9\u6cd5\uff1a<\/p>\n<pre>class Pointer:\n\n    def __init_subclass__(cls, **kwargs):\n        bases = tuple(set(cls.__bases__) - {Pointer})\n        assert len(bases) &lt;= 1, '\u53ea\u80fd\u518d\u7ee7\u627f\u4e00\u4e2a\u7c7b'\n        assert len(bases), '\u5fc5\u987b\u518d\u7ee7\u627f\u4e00\u4e2a\u7c7b'\n        bases = bases[0]<\/pre>\n<p>__init_subclass__ \u65b9\u6cd5\u5728\u521b\u5efa\u5b50\u7c7b\u65f6\u8c03\u7528\uff0c\u4f20\u5165\u4e86\u5b50\u7c7b\u7684\u53c2\u6570\u3002\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d\uff0c\u5b83\uff1a<\/p>\n<ul>\n<li>\u63d0\u53d6\u51fa\u5b50\u7c7b\u7684\u7236\u7c7b\u3002\u7531\u4e8e\u65e0\u9700\u7ee7\u627f pointer \u7c7b\uff0c\u56e0\u6b64\u5c06\u5176\u4ece\u7236\u7c7b\u4e2d\u79fb\u9664\u3002<\/li>\n<li>\u786e\u4fdd\u53ea\u6709\u4e00\u4e2a\u7c7b\u578b\u7c7b\u4f5c\u4e3a\u7236\u7c7b\u3002<\/li>\n<li>\u521d\u59cb\u5316\u5b50\u7c7b\u7684\u4e00\u4e9b\u5c5e\u6027\uff0c\u5982 __init__\u3001__setattr__\u3001__getattribute__ \u7b49\u3002<\/li>\n<li>\u8bbe\u7f6e __value__ \u4e3a none\u3002<\/li>\n<li>\u8bbe\u7f6e __class__ \u4e3a\u5b50\u7c7b\u672c\u8eab\uff0c\u56e0\u4e3a\u5b83\u5728\u521b\u5efa\u5b50\u7c7b\u540e\u88ab\u66ff\u6362\u4e3a\u7236\u7c7b\u3002<\/li>\n<li>\u8bbe\u7f6e __type__ \u4e3a\u7c7b\u578b\u7c7b\u3002<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u4f7f\u7528 __init_subclass__\uff0c\u53ef\u4ee5\u5728\u521b\u5efa\u5b50\u7c7b\u65f6\u52a8\u6001\u5730\u4fee\u6539\u5176\u5c5e\u6027\uff0c\u800c\u65e0\u9700\u5c06\u5176\u5185\u5bb9\u79fb\u51fa __new__ \u51fd\u6570\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u300aPython\u4e2d\u5982\u4f55\u4f18\u96c5\u5730\u89e3\u51b3\u591a\u91cd\u7ee7\u627f\u4fee\u6539\u7c7b\u578b\u7c7b\u7684\u95ee\u9898\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Python\u4e2d\u5982\u4f55\u4f18\u96c5\u5730\u89e3\u51b3\u591a\u91cd&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-204714","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204714","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=204714"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204714\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204714"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204714"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204714"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}