{"id":1023,"date":"2022-01-28T14:29:51","date_gmt":"2022-01-28T06:29:51","guid":{"rendered":"http:\/\/www.eait.co\/?p=1023"},"modified":"2022-01-28T14:34:36","modified_gmt":"2022-01-28T06:34:36","slug":"python-%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/notes.coremix.net\/?p=1023","title":{"rendered":"python \u5355\u4f8b\u6a21\u5f0f"},"content":{"rendered":"<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\ndef singleton(cls, *args, **kwargs):\r\n    instances = {}\r\n\r\n    def _singleton():\r\n        if cls not in instances:\r\n            instances&#x5B;cls] = cls(*args, **kwargs)\r\n        return instances&#x5B;cls]\r\n\r\n    return _singleton\r\n\r\n@singleton\r\nfunction()\r\n\r\n\r\nclass Earth:\r\n    def __new__(cls):\r\n        if not hasattr(cls, 'instance'):\r\n            cls.instance = super().__new__(cls)\r\n        return cls.instance\r\n    def __init__(self):\r\n        self.name = 'earth'\r\n\r\ne = Earth()\r\nprint(e, id(e))\r\na = Earth()\r\nprint(a, id(a))\r\n\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>def singleton(cls, *args, **kwargs): instances = {} def [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[20],"class_list":["post-1023","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-python"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/notes.coremix.net\/index.php?rest_route=\/wp\/v2\/posts\/1023","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/notes.coremix.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/notes.coremix.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/notes.coremix.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/notes.coremix.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1023"}],"version-history":[{"count":6,"href":"https:\/\/notes.coremix.net\/index.php?rest_route=\/wp\/v2\/posts\/1023\/revisions"}],"predecessor-version":[{"id":1029,"href":"https:\/\/notes.coremix.net\/index.php?rest_route=\/wp\/v2\/posts\/1023\/revisions\/1029"}],"wp:attachment":[{"href":"https:\/\/notes.coremix.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1023"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/notes.coremix.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1023"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/notes.coremix.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1023"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}