{"id":1997,"date":"2022-12-01T14:21:53","date_gmt":"2022-12-01T06:21:53","guid":{"rendered":"https:\/\/qaqaq.top\/?p=1997"},"modified":"2022-12-01T14:21:53","modified_gmt":"2022-12-01T06:21:53","slug":"python-global-%e5%92%8cself","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=1997","title":{"rendered":"python global \u548cself"},"content":{"rendered":"\n<p>\u53ef\u4ee5\u770b\u4e0b\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u5176\u5b9e\u662f\u62a5\u9519\u7684\u3002 a \u8fd9\u4e2a\u53d8\u91cf\u4e0d\u662f\u5168\u5c40\u7684\u53d8\u91cf\uff0c\u5728 two \u8fd9\u4e2a \u65b9\u6cd5\u91cc\uff0c\u662f\u4e0d\u80fd\u6253\u5370\u7684\uff0c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class qq():\r\n    a = 99\r\n    def __init__(self):\r\n        pass\r\n\r\n    def one(self):\r\n        a = 5\r\n        print(a)\r\n\r\n    def two(self):\r\n        print(a)\r\n        \r\nw = qq()\r\nw.one()\r\nw.two()\r\n<\/code><\/pre>\n\n\n\n<p>\u518d\u770b\u4e0b\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u6211\u5c31\u662f\u52a0\u4e00\u4e2a global \u5c31\u628a a \u53d8\u4e86\u5168\u5c40\u7684\u53d8\u91cf<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class qq():\r\n    global a\r\n    a = 99\r\n    def __init__(self):\r\n        pass\r\n\r\n    def one(self):\r\n        a = 5\r\n        print(a)   # \u8fd9\u4e2a a \u8f93\u51fa\u7684\u5c31\u662f\u4e0a\u9762 a \u4f46\u662f\u4ed6\u8fd9\u4e2a\u662f\u6ca1\u6709\u6539\u53d8 \u5168\u5c40\u53d8\u91cf a \u7684\u503c \r\n\r\n    def two(self):\r\n        print(a)   # \u4e0a\u9762\u8bf4\u4e86\u4ed6\u662f\u6ca1\u6709\u6539\u53d8\u5168\u5c40\u53d8\u91cf\u7684\u503c\uff0c\u6240\u6709\u8fd9\u4e2a\u6253\u5370\u7684\u5c31\u662f\uff0c\u5168\u5c40\u53d8\u91cf\u7684\u503c 99\r\n\r\nw = qq()\r\nw.one()\r\nw.two()\r\n<\/code><\/pre>\n\n\n\n<p>\u53ef\u4ee5\u901a\u8fc7 id() \u8fd9\u4e2a\u65b9\u6cd5\uff0c\u53bb\u68c0\u67e5 \u53d8\u91cf\u7684\u5b58\u50a8\u7684 \u5185\u5b58\u5730\u5740\uff0c\u770b\u8fd9\u4e2a\u53d8\u91cf\u662f\u5426\u6539\u53d8\u4e86<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/qaqaq.top\/wp-content\/uploads\/2022\/12\/image-4.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"342\" height=\"560\" data-original=\"https:\/\/qaqaq.top\/wp-content\/uploads\/2022\/12\/image-4.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1998\"  sizes=\"(max-width: 342px) 100vw, 342px\" \/><\/div><\/figure>\n\n\n\n<p>\u63a5\u4e0b\u6765\u5c31\u662f\u5bf9 self \u8fd9\u4e2a\u65b9\u6cd5\u7684\u4e00\u4e2a \u4f7f\u7528<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class a():\r\n\r\n    def __init__(self):\r\n        self.qq = 3\r\n        print(id(self.qq))\r\n\r\n    def b(self):\r\n        self.qq = 9\r\n        print(self.qq,id(self.qq))\r\n\r\n    def c(self):\r\n        print(self.qq,id(self.qq))\r\n\r\ncxp = a()\r\ncxp.b()\r\ncxp.c()\r\n<\/code><\/pre>\n\n\n\n<p>\u770b\u4e0b\u9762\u7684\u8fd0\u884c\u7ed3\u679c<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/qaqaq.top\/wp-content\/uploads\/2022\/12\/image-5.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"285\" height=\"502\" data-original=\"https:\/\/qaqaq.top\/wp-content\/uploads\/2022\/12\/image-5.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1999\"  sizes=\"(max-width: 285px) 100vw, 285px\" \/><\/div><\/figure>\n\n\n\n<p>\u603b\u7ed3\uff1a<br>global \u5c31\u662f\u7533\u660e\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf\uff0c\u4e0d\u4f1a\u968f\u7740\u65b9\u6cd5\u7684\u91cd\u65b0\u8d4b\u503c\u800c\u6539\u53d8\uff0c<br>\u4f46\u662f self \u5374\u662f\u4f1a\u7684 \uff0cself \u4e5f\u662f\u7533\u660e\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf\uff0c\u4f46\u662f \u540e\u9762\u7684\u65b9\u6cd5 \u5982\u679c\u5bf9\u4ed6\u91cd\u65b0\u8d4b\u503c\u4e86\uff0c\u8fd9\u4e2a\u91cd\u65b0\u8d4b\u503c\u7684\u65b9\u6cd5\u4e5f\u88ab\u8c03\u7528\u4e86\uff0c\u90a3\u4e48\uff0c\u8fd9\u4e2a\u503c\u5c31\u53d8\u4e86\u3002\u5c31\u6bd4\u5982\u4e0a\u56fe\u7684 b \u65b9\u6cd5 \u8981\u662f\u8fd9\u4e2a \u65b9\u6cd5\u88ab\u8c03\u7528\u4e86\uff0c\u5c31\u6539\u53d8\u4e86\u3002\u8981\u662f\u6ca1\u88ab\u8c03\u7528\uff0c\u90a3\u4e5f\u4e0d\u4f1a\u53d8<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u53ef\u4ee5\u770b\u4e0b\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u5176\u5b9e\u662f\u62a5\u9519\u7684\u3002 a \u8fd9\u4e2a\u53d8\u91cf\u4e0d\u662f\u5168\u5c40\u7684\u53d8\u91cf\uff0c\u5728 two \u8fd9\u4e2a \u65b9\u6cd5\u91cc\uff0c\u662f\u4e0d\u80fd\u6253\u5370\u7684\uff0c \u518d\u770b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[45],"tags":[50],"class_list":["post-1997","post","type-post","status-publish","format-standard","hentry","category-python-","tag-python"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1997"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1997"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1997\/revisions"}],"predecessor-version":[{"id":2000,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1997\/revisions\/2000"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1997"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1997"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}