{"id":204874,"date":"2025-05-29T08:32:31","date_gmt":"2025-05-29T00:32:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204874\/"},"modified":"2025-05-29T08:32:31","modified_gmt":"2025-05-29T00:32:31","slug":"python-%e9%93%be%e5%bc%8f%e8%b0%83%e7%94%a8%e4%b8%ad%ef%bc%8c%e4%b8%ba%e4%bb%80%e4%b9%88%e6%af%8f%e6%ac%a1%e8%b0%83%e7%94%a8__getattr__%e9%83%bd%e4%bc%9a%e5%88%9b%e5%bb%ba%e6%96%b0%e7%9a%84%e5%ae%9e","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204874\/","title":{"rendered":"Python \u94fe\u5f0f\u8c03\u7528\u4e2d\uff0c\u4e3a\u4ec0\u4e48\u6bcf\u6b21\u8c03\u7528__getattr__\u90fd\u4f1a\u521b\u5efa\u65b0\u7684\u5b9e\u4f8b\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Python \u94fe\u5f0f\u8c03\u7528\u4e2d\uff0c\u4e3a\u4ec0\u4e48\u6bcf\u6b21\u8c03\u7528__getattr__\u90fd\u4f1a\u521b\u5efa\u65b0\u7684\u5b9e\u4f8b\uff1f<\/h1>\n<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241118\/1731914326673aea5611159.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>pyhton\u7c7b\u7684\u5185\u5b58\u5206\u914d\u95ee\u9898\uff1a\u94fe\u5f0f\u8c03\u7528<\/strong><\/p>\n<p>\u5728\u4f7f\u7528__getattr__\u9b54\u672f\u65b9\u6cd5\u5b9e\u73b0\u94fe\u5f0f\u8c03\u7528\u65f6\uff0c\u6bcf\u6b21\u8c03\u7528\u8fd4\u56de\u7684chain\u5b9e\u4f8b\u7684id\u4f1a\u4e0d\u540c\u3002\u8fd9\u662f\u56e0\u4e3a\u6bcf\u5f53\u8c03\u7528__getattr__\u65f6\uff0c\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684chain\u5b9e\u4f8b\u3002<\/p>\n<p><strong>\u539f\u56e0\u5206\u6790<\/strong><\/p>\n<p>\u5728\u63d0\u4f9b\u7684\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0c__getattr__\u65b9\u6cd5\u4e2d\u7684\u4ee3\u7801\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684chain\u5b9e\u4f8b\uff0c\u5e76\u5c06\u4f20\u7ed9path\u53c2\u6570\u7684\u65b0\u8def\u5f84\u4f5c\u4e3a\u5b83\u7684_path\u5c5e\u6027\u3002\u6bcf\u6b21\u8c03\u7528\u8fd4\u56de\u7684\u90fd\u662f\u4e00\u4e2a\u4e0d\u540c\u7684chain\u5b9e\u4f8b\uff0c\u56e0\u6b64\u5176id\u4e5f\u968f\u4e4b\u6539\u53d8\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6cd5<\/strong><\/p>\n<p>\u8981\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u9700\u8981\u4fee\u6539__getattr__\u65b9\u6cd5\u4e2d\u521b\u5efa\u5b9e\u4f8b\u7684\u65b9\u5f0f\uff0c\u4f7f\u5176\u8fd4\u56de\u5f53\u524d\u5b9e\u4f8b\u800c\u4e0d\u662f\u521b\u5efa\u65b0\u7684\u5b9e\u4f8b\u3002\u4fee\u6539\u540e\u7684\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre>def __getattr__(self, path):\n    self._path = '%s\/%s' % (self._path, path)\n    return self<\/pre>\n<p>\u901a\u8fc7\u8fd9\u79cd\u4fee\u6539\uff0c__getattr__\u65b9\u6cd5\u5c06\u4e0d\u4f1a\u521b\u5efa\u65b0\u7684chain\u5b9e\u4f8b\uff0c\u800c\u662f\u8fd4\u56de\u5f53\u524d\u5b9e\u4f8b\u3002\u8fd9\u6837\uff0c\u6bcf\u6b21\u8c03\u7528\u5c06\u8fd4\u56de\u76f8\u540c\u7684chain\u5b9e\u4f8b\uff0c\u5e76\u4e14\u5176id\u4e5f\u4f1a\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300aPython \u94fe\u5f0f\u8c03\u7528\u4e2d\uff0c\u4e3a\u4ec0\u4e48\u6bcf\u6b21\u8c03\u7528__getattr__\u90fd\u4f1a\u521b\u5efa\u65b0\u7684\u5b9e\u4f8b\uff1f\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Python \u94fe\u5f0f\u8c03\u7528\u4e2d\uff0c\u4e3a\u4ec0\u4e48&#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-204874","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204874","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=204874"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204874\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204874"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204874"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204874"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}