{"id":205306,"date":"2025-05-29T10:30:46","date_gmt":"2025-05-29T02:30:46","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205306\/"},"modified":"2025-05-29T10:30:46","modified_gmt":"2025-05-29T02:30:46","slug":"%e5%a6%82%e4%bd%95%e8%a7%a3%e5%86%b3%e5%a4%9a%e9%87%8d%e7%bb%a7%e6%89%bf%e4%b8%ad%e5%8a%a8%e6%80%81%e4%bf%ae%e6%94%b9%e9%ad%94%e6%b3%95%e6%96%b9%e6%b3%95%e6%97%b6%ef%bc%8c%e6%b4%be%e7%94%9f%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205306\/","title":{"rendered":"\u5982\u4f55\u89e3\u51b3\u591a\u91cd\u7ee7\u627f\u4e2d\u52a8\u6001\u4fee\u6539\u9b54\u6cd5\u65b9\u6cd5\u65f6\uff0c\u6d3e\u751f\u7c7b\u65e0\u6cd5\u4f7f\u7528\u57fa\u7c7b\u9b54\u6cd5\u65b9\u6cd5\u7684\u95ee\u9898\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u89e3\u51b3\u591a\u91cd\u7ee7\u627f\u4e2d\u52a8\u6001\u4fee\u6539\u9b54\u6cd5\u65b9\u6cd5\u65f6\uff0c\u6d3e\u751f\u7c7b\u65e0\u6cd5\u4f7f\u7528\u57fa\u7c7b\u9b54\u6cd5\u65b9\u6cd5\u7684\u95ee\u9898\uff1f<\/h1>\n

\u76ee\u524d\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8e\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587\u300a\u5982\u4f55\u89e3\u51b3\u591a\u91cd\u7ee7\u627f\u4e2d\u52a8\u6001\u4fee\u6539\u9b54\u6cd5\u65b9\u6cd5\u65f6\uff0c\u6d3e\u751f\u7c7b\u65e0\u6cd5\u4f7f\u7528\u57fa\u7c7b\u9b54\u6cd5\u65b9\u6cd5\u7684\u95ee\u9898\uff1f\u300b<\/span>\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60\u6587\u7ae0<\/span>\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~<\/p>\n

<\/p>\n

\u52a8\u6001\u4fee\u6539\u7c7b\u7684\u9b54\u6cd5\u65b9\u6cd5<\/strong><\/p>\n

\u5728\u591a\u91cd\u7ee7\u627f\u573a\u666f\u4e2d\uff0c\u6d3e\u751f\u7c7b\u53ef\u80fd\u5e0c\u671b\u62e5\u6709\u57fa\u7c7b\u7684\u9b54\u6cd5\u65b9\u6cd5\uff0c\u540c\u65f6\u53c8\u4e0d\u9700\u8981\u91cd\u5199\u5b83\u4eec\u3002\u5bf9\u4e8e\u9700\u8981\u52a8\u6001\u4fee\u6539\u9b54\u6cd5\u65b9\u6cd5\u7684\u7279\u6b8a\u9700\u6c42\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5b9e\u73b0\uff1a<\/p>\n

\u95ee\u9898\u5206\u6790<\/strong><\/p>\n

\u793a\u4f8b\u4ee3\u7801\u4e2d\uff0cpointer \u7c7b\u901a\u8fc7 __new__ \u65b9\u6cd5\u548c __init__ \u65b9\u6cd5\u5b9e\u73b0\u4e86\u52a8\u6001\u4ee3\u7406\uff0c\u53ef\u4ee5\u7ee7\u627f\u5176\u4ed6\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u4f46\u662f\uff0c\u5f53 print \u51fd\u6570\u76f4\u63a5\u8c03\u7528 strpointer \u5bf9\u8c61\u65f6\uff0c\u5b83\u4f7f\u7528\u7684\u662f str \u7c7b\u7684 __str__ \u65b9\u6cd5\uff0c\u800c\u4e0d\u662f pointer \u7c7b\u4e2d\u7684 __str__ \u65b9\u6cd5\u3002\u8fd9\u662f\u56e0\u4e3a print \u51fd\u6570\u8c03\u7528\u7684\u662f type(object).__str__(object)\uff0c\u800c type \u51fd\u6570\u8fd4\u56de\u7684\u662f\u5bf9\u8c61\u7684\u5b9e\u9645\u7c7b\u578b\u3002\u56e0\u6b64\uff0c\u9700\u8981\u5c06 __str__ \u65b9\u6cd5\u6dfb\u52a0\u5230 self \u5bf9\u8c61\u4e2d\uff0c\u800c\u4e0d\u662f\u4fee\u6539\u7c7b\u7684\u5b57\u5178\u3002<\/p>\n

\u89e3\u51b3\u65b9\u6848<\/strong><\/p>\n

\u89e3\u51b3\u65b9\u6cd5\u662f\u5728 __init__ \u65b9\u6cd5\u4e2d\uff0c\u52a8\u6001\u4fee\u6539 self \u5bf9\u8c61\u4e2d __str__ \u65b9\u6cd5\u7684\u6307\u5411\u3002\u901a\u8fc7\u4ee5\u4e0b\u4ee3\u7801\u5b9e\u73b0\uff1a<\/p>\n

if not hasattr(self, \"__str__\"):\n    setattr(self, \"__str__\", cls_.__dict__[\"__str__\"])<\/pre>\n
\u8fd9\u6837\uff0c\u5f53 print \u51fd\u6570\u8c03\u7528 strpointer \u5bf9\u8c61\u65f6\uff0c\u5b83\u5c06\u4f7f\u7528 self.__str__ \u65b9\u6cd5\uff0c\u4ece\u800c\u5b9e\u73b0\u52a8\u6001\u4fee\u6539\u9b54\u6cd5\u65b9\u6cd5\u7684\u76ee\u7684\u3002<\/p>\n
\u4fee\u6539\u540e\u7684\u4ee3\u7801<\/strong><\/p>\n
class Pointer:\n\n    def __new__(cls, *args, **kwargs):\n        if cls == Pointer:\n            return super().__new__(cls)\n        if 'cls_' in kwargs:\n            kwargs.pop('cls_')\n        return Pointer(*args, **kwargs, cls_=cls)\n\n    def __init__(self, value=None, *, cls_=None):\n        self.__interior = True\n        self.__value = value\n        for i in dir(value):\n            if i != '__class__':\n                if i in cls_.__dict__:\n                    # print(i)\n                    setattr(self, i, cls_.__dict__[i])\n                try:\n                    setattr(self, i, getattr(value, i))\n                except AttributeError:\n                    pass\n                if not hasattr(self, \"__str__\"):\n                    setattr(self, \"__str__\", cls_.__dict__[\"__str__\"])\n        self.__interior = False<\/pre>\n
\u4ee5\u4e0a\u5c31\u662f\u300a\u5982\u4f55\u89e3\u51b3\u591a\u91cd\u7ee7\u627f\u4e2d\u52a8\u6001\u4fee\u6539\u9b54\u6cd5\u65b9\u6cd5\u65f6\uff0c\u6d3e\u751f\u7c7b\u65e0\u6cd5\u4f7f\u7528\u57fa\u7c7b\u9b54\u6cd5\u65b9\u6cd5\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":"
\u5982\u4f55\u89e3\u51b3\u591a\u91cd\u7ee7\u627f\u4e2d\u52a8\u6001\u4fee\u6539\u9b54\u6cd5\u65b9...<\/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-205306","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205306","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=205306"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205306\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}