\u5355\u4f8b\u6a21\u5f0f, \u662f\u8bbe\u8ba1\u6a21\u5f0f\u7684\u4e00\u79cd, \u9002\u7528\u4e8e\u53ea\u9700\u8981\u4e00\u4e2a\u5b9e\u4f8b\u7684\u7c7b, \u6bd4\u5982\u97f3\u4e50\u64ad\u653e\u5668<\/p>\n\n\n\n
class MusicPlayer(object):\n #\u5355\u4f8b\u6a21\u5f0f\u7684\u5bf9\u8c61\u5f15\u7528\n instace = None\n \n def __new__(cls, *args, **kwargs):\n if cls.instance is None:\n cls.instance = super().__new__(cls)\n\n return cls.instance\n\nplayer1 = MusicPlayer()\nplayer2 = MusicPlayer()\n\nprint(player1) #\u5f97\u5230\u7684\u5730\u5740\u76f8\u540c, \u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\nprint(player2)<\/code><\/pre>\n\n\n\n\u7a0b\u5e8f\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b: <\/p>\n\n\n\n
<__main__.MusicPlayer object at 0x000002A2A00A5F28>\n<__main__.MusicPlayer object at 0x000002A2A00A5F28><\/code><\/pre>\n\n\n\n\u5173\u4e8e __new__<\/strong><\/p>\n\n\n\n\u6b64\u5185\u7f6e\u65b9\u6cd5, \u662f\u5728\u521b\u5efa\u5bf9\u8c61\u65f6, \u81ea\u52a8\u88ab\u8c03\u7528, \u9ed8\u8ba4\u8fd4\u56de\u7684\u662fsuper().__new__(cls)<\/p>\n\n\n\n
\u53ea\u9700\u8981\u628a\u7b2c\u4e00\u6b21\u521b\u5efa\u7684\u5bf9\u8c61\u5730\u5740\u4fdd\u5b58\u5230\u7c7b\u5c5e\u6027\u4e2d, \u540e\u7eed\u8fd4\u56de\u6b64\u5730\u5740\u5373\u53ef<\/p>\n\n\n\n
\u4e00\u6b21\u521d\u59cb\u5316<\/strong><\/p>\n\n\n\n\u867d\u7136\u5355\u5355\u4f8b\u5bf9\u8c61\u53ea\u4f1a\u521b\u5efa\u4e00\u4e2a, \u4f46\u4f1a\u591a\u6b21\u521d\u59cb\u5316, \u5982\u679c\u60f3\u8981\u521d\u59cb\u5316\u4e00\u6b21, \u53ef\u53c2\u8003\u5982\u4e0b<\/p>\n\n\n\n
class MusicPlayer(object):\n # \u5355\u4f8b\u6a21\u5f0f\u7684\u5bf9\u8c61\u5f15\u7528\n instance = None\n init_flag = False\n\n def __new__(cls, *args, **kwargs):\n if cls.instance is None:\n cls.instance = super().__new__(cls)\n\n return cls.instance\n\n def __init__(self):\n if MusicPlayer.init_flag:\n return\n MusicPlayer.init_flag=True\n\nplayer1 = MusicPlayer()\nplayer2 = MusicPlayer()\n\nprint(player1) # \u5f97\u5230\u7684\u5730\u5740\u76f8\u540c, \u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\nprint(player2)<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5355\u4f8b\u6a21\u5f0f, \u662f\u8bbe\u8ba1\u6a21\u5f0f\u7684\u4e00\u79cd, \u9002\u7528\u4e8e\u53ea\u9700\u8981\u4e00\u4e2a\u5b9e\u4f8b\u7684\u7c7b, \u6bd4\u5982\u97f3\u4e50\u64ad\u653e\u5668 \u7a0b\u5e8f\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b: \u5173\u4e8e __ne… \u7ee7\u7eed\u9605\u8bfb python\u7684\u5355\u4f8b\u6a21\u5f0f<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[9],"tags":[],"_links":{"self":[{"href":"https:\/\/www.52dixiaowo.com\/python\/wp-json\/wp\/v2\/posts\/105"}],"collection":[{"href":"https:\/\/www.52dixiaowo.com\/python\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52dixiaowo.com\/python\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/python\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/python\/wp-json\/wp\/v2\/comments?post=105"}],"version-history":[{"count":0,"href":"https:\/\/www.52dixiaowo.com\/python\/wp-json\/wp\/v2\/posts\/105\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.52dixiaowo.com\/python\/wp-json\/wp\/v2\/media?parent=105"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/python\/wp-json\/wp\/v2\/categories?post=105"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/python\/wp-json\/wp\/v2\/tags?post=105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}