{"id":205308,"date":"2025-05-29T13:02:38","date_gmt":"2025-05-29T05:02:38","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205308\/"},"modified":"2025-05-29T13:02:38","modified_gmt":"2025-05-29T05:02:38","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8%e5%af%bc%e5%85%a5%e7%b1%bb%e5%90%8e%e4%bf%ae%e6%94%b9%e5%85%b6%e8%a1%8c%e4%b8%ba%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205308\/","title":{"rendered":"\u5982\u4f55\u5728\u5bfc\u5165\u7c7b\u540e\u4fee\u6539\u5176\u884c\u4e3a\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5982\u4f55\u5728\u5bfc\u5165\u7c7b\u540e\u4fee\u6539\u5176\u884c\u4e3a\uff1f<\/h1>\n<p>\u7f16\u7a0b\u5e76\u4e0d\u662f\u4e00\u4e2a\u673a\u68b0\u6027\u7684\u5de5\u4f5c\uff0c\u800c\u662f\u9700\u8981\u6709\u601d\u8003\uff0c\u6709\u521b\u65b0\u7684\u5de5\u4f5c\uff0c\u8bed\u6cd5\u662f\u56fa\u5b9a\u7684\uff0c\u4f46\u89e3\u51b3\u95ee\u9898\u7684\u601d\u8def\u5219\u662f\u4f9d\u9760\u4eba\u7684\u601d\u7ef4\uff0c\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u575a\u6301\u5b66\u4e60\u548c\u66f4\u65b0\u81ea\u5df1\u7684\u77e5\u8bc6\u3002\u4eca\u5929\u5c31\u6574\u7406\u5206\u4eab\u300a\u5982\u4f55\u5728\u5bfc\u5165\u7c7b\u540e\u4fee\u6539\u5176\u884c\u4e3a\uff1f\u300b\uff0c\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\uff0c\u5982\u679c\u4f60\u5bf9\u6587\u7ae0\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\uff0c\u5728\u8fd9\u53ef\u4ee5\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5f00\u53d1\u80fd\u529b\u7684\u63d0\u5347\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241128\/173279093067484a9223744.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5982\u4f55\u4fee\u6539\u5df2\u5bfc\u5165\u7684\u7c7b\uff1f<\/strong><\/p>\n<p>\u5728 python \u4e2d\uff0c\u5bfc\u5165\u7c7b\u540e\u65e0\u6cd5\u76f4\u63a5\u4fee\u6539\u5176\u5185\u5bb9\u3002\u7136\u800c\uff0c\u53ef\u4ee5\u4f7f\u7528\u67d0\u4e9b\u6280\u672f\u6765\u5b9e\u73b0\u7c7b\u4f3c\u6548\u679c\u3002<\/p>\n<p>\u4e00\u79cd\u89e3\u51b3\u65b9\u6848\u662f\u4f7f\u7528__init_subclass__\u65b9\u6cd5\u3002\u6b64\u65b9\u6cd5\u4f1a\u5728\u521b\u5efa\u7c7b\u7684\u5b50\u7c7b\u65f6\u8c03\u7528\uff0c\u5141\u8bb8\u60a8\u4fee\u6539\u5b50\u7c7b\u7684\u884c\u4e3a\u3002<\/p>\n<p>\u4e3a\u4e86\u4fee\u6539\u6307\u9488\u7c7b\uff0c\u53ef\u4ee5\u8986\u76d6\u5176__init_subclass__\u65b9\u6cd5\uff1a<\/p>\n<pre>class Pointer:\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]\n        for fun_name in dir(cls):\n            if fun_name not in not_transfer_fun and callable(getattr(cls, fun_name)):\n                setattr(cls, fun_name, fun_transfer(getattr(cls, fun_name)))\n        cls.__init__ = __init__\n        cls.__setattr__ = __setattr__\n        cls.__getattribute__ = __getattribute__\n        cls.__value__ = None\n        cls.__class__ = cls\n        cls.__type__ = bases\n        return cls<\/pre>\n<ul>\n<li>bases\u8868\u793a\u5b50\u7c7b\u7684\u7236\u7c7b\u5217\u8868\u3002<\/li>\n<li>\u5faa\u73afcls\u76ee\u5f55\u4e2d\u7684\u51fd\u6570\uff0c\u6392\u9664\u4e0d\u5e94\u4fee\u6539\u7684\u51fd\u6570\uff0c\u5e76\u5c06\u5176\u66ff\u6362\u4e3a\u5df2\u4fee\u6539\u7684\u7248\u672c\u3002<\/li>\n<li>\u8bbe\u7f6e\u5b50\u7c7b\u7684\u5c5e\u6027\uff0c\u5305\u62ec__init__\u3001__setattr__\u548c__getattribute__\u3002<\/li>\n<li>\u8bbe\u7f6e\u5b50\u7c7b\u7684\u79c1\u6709\u5c5e\u6027__value__\u3001__class__\u548c__type__\u3002<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u60a8\u53ef\u4ee5\u5728\u5bfc\u5165\u7c7b\u540e\u4fee\u6539\u5176\u884c\u4e3a\uff0c\u4ece\u800c\u907f\u514d\u76f4\u63a5\u4fee\u6539\u7c7b\u5185\u5bb9\u3002<\/p>\n<p>\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u5982\u4f55\u5728\u5bfc\u5165\u7c7b\u540e\u4fee\u6539\u5176\u884c\u4e3a\uff1f\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u5728\u5bfc\u5165\u7c7b\u540e\u4fee\u6539\u5176\u884c\u4e3a\uff1f \u7f16\u7a0b&#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-205308","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205308","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=205308"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205308\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205308"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205308"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205308"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}