{"id":303630,"date":"2024-05-20T19:04:08","date_gmt":"2024-05-20T11:04:08","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/303630.html"},"modified":"2024-05-20T19:04:19","modified_gmt":"2024-05-20T11:04:19","slug":"if-__name__-__main__-%e5%a6%82%e4%bd%95%e6%ad%a3%e7%a1%ae%e7%90%86%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/303630.html","title":{"rendered":"if __name__ == &#8216;__main__&#8217; \u5982\u4f55\u6b63\u786e\u7406\u89e3"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26215909\/22ea3fa4-65f2-4c38-8bbe-dfbebfe518f8.webp\" alt=\"if __name__ == '__main__' \u5982\u4f55\u6b63\u786e\u7406\u89e3\" \/><\/p>\n<p><p><strong><code>if __name__ == &#039;__m<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>n__&#039;<\/code>\u662fPython\u4ee3\u7801\u4e2d\u7684\u4e00\u4e2a\u5e38\u7528\u8bed\u53e5\uff0c\u5b83\u786e\u4fdd\u4ee3\u7801\u5757\u53ea\u5728\u8be5\u6a21\u5757\u4f5c\u4e3a\u4e3b\u7a0b\u5e8f\u6267\u884c\u65f6\u8fd0\u884c\u3001\u800c\u5728\u5176\u4ed6\u5730\u65b9\u88ab\u5bfc\u5165\u65f6\u4e0d\u8fd0\u884c\u3002<\/strong> 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__name__ == &#039;__main__&#039;<\/code>\u7684\u5de5\u4f5c\u539f\u7406\u5efa\u7acb\u5728Python\u6a21\u5757\u7684<code>__name__<\/code>\u5c5e\u6027\u57fa\u7840\u4e4b\u4e0a\u3002<\/strong> \u5f53Python\u89e3\u91ca\u5668\u8fd0\u884c\u4e00\u4e2a\u6a21\u5757\u65f6\uff0c\u89e3\u91ca\u5668\u5c06<code>__name__<\/code>\u53d8\u91cf\u8bbe\u7f6e\u4e3a<code>&#039;__main__&#039;<\/code>\u3002\u5982\u679c\u8be5\u6587\u4ef6\u88ab\u5bfc\u5165\u5230\u522b\u7684\u6a21\u5757\uff0c<code>__name__<\/code>\u4f1a\u8bbe\u7f6e\u4e3a\u6a21\u5757\u540d\u3002\u57fa\u4e8e\u8fd9\u4e2a\u5c5e\u6027\uff0c\u53ef\u4ee5\u5224\u65ad\u51fa\u6a21\u5757\u662f\u88ab\u76f4\u63a5\u8fd0\u884c\u8fd8\u662f\u88ab\u5bfc\u5165\u3002<\/p>\n<\/p>\n<p><h4>\u4e3a\u4ec0\u4e48\u4f7f\u7528<code>if __name__ == &#039;__main__&#039;<\/code><\/h4>\n<\/p>\n<ul>\n<li>\u907f\u514d\u4ee3\u7801\u5728\u88ab\u5bfc\u5165\u65f6\u8fd0\u884c\uff0c\u53ea\u5728\u6587\u4ef6\u4f5c\u4e3a\u811a\u672c\u76f4\u63a5\u6267\u884c\u65f6\u8fd0\u884c\u3002<\/li>\n<li>\u5728\u6a21\u5757\u4e2d\u653e\u7f6e\u793a\u4f8b\u4ee3\u7801\u3001\u6d4b\u8bd5\u4ee3\u7801\uff0c\u800c\u4e0d\u4f1a\u5f71\u54cd\u5bfc\u5165\u8be5\u6a21\u5757\u7684\u5176\u4ed6\u4ee3\u7801\u3002<\/li>\n<li>\u63d0\u9ad8\u4ee3\u7801\u7684\u6a21\u5757\u6027\u548c\u53ef\u91cd\u7528\u6027\u3002<\/li>\n<\/ul>\n<p><h3>\u4e8c\u3001\u5b9e\u4f8b\u89e3\u6790<\/h3>\n<\/p>\n<p><p>\u8ba9\u6211\u4eec\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u5b9e\u4f8b\u6765\u8bf4\u660e<code>if __name__ == &#039;__main__&#039;<\/code>\u7684\u4f7f\u7528\u3002<\/p>\n<\/p>\n<p><p><strong>\u5047\u8bbe\u6709\u4e00\u4e2a\u53eb\u505a<code>module.py<\/code>\u7684\u6587\u4ef6\uff0c\u5b83\u5b9a\u4e49\u4e86\u4e00\u4e2a\u51fd\u6570\u548c\u4e3b\u6267\u884c\u4ee3\u7801\u3002<\/strong><\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># module.py<\/p>\n<p>def foo():<\/p>\n<p>    print(&quot;This is function &#039;foo&#039;.&quot;)<\/p>\n<p>if __name__ == &#039;__main__&#039;:<\/p>\n<p>    print(&quot;This code block is running as the main program.&quot;)<\/p>\n<p>    foo()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5f53\u76f4\u63a5\u8fd0\u884c<code>module.py<\/code>\u65f6\uff0c\u4f1a\u6253\u5370\u51fa\u6765\u4e24\u53e5\u8bdd\uff0c\u800c\u5f53\u5b83\u88ab\u5176\u4ed6\u811a\u672c\u5bfc\u5165\u65f6\uff0c<code>foo<\/code>\u51fd\u6570\u53ef\u7528\u4f46\u4e0d\u4f1a\u6253\u5370\u4efb\u4f55\u5185\u5bb9\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u5728\u5f00\u53d1\u4e2d\u7684\u5e94\u7528<\/h3>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u4f60\u53ef\u80fd\u4f1a\u770b\u5230\u5f88\u591a\u9879\u76ee\u4e2d\u7684Python\u6587\u4ef6\uff08\u5c24\u5176\u662f\u90a3\u4e9b\u8bbe\u8ba1\u7528\u6765\u4f5c\u4e3a\u7a0b\u5e8f\u5165\u53e3\u7684\u6587\u4ef6\uff09\u90fd\u5305\u542b<code>if __name__ == &#039;__main__&#039;<\/code>\u8bed\u53e5\u3002<\/p>\n<\/p>\n<p><h4>\u5b9e\u8df5\u4e2d\u7684\u4ef7\u503c<\/h4>\n<\/p>\n<ul>\n<li><strong>\u4fc3\u8fdb\u6e05\u6670\u7684\u6a21\u5757\u63a5\u53e3\u8bbe\u8ba1\u3002<\/strong> \u53ef\u4ee5\u660e\u786e\u5730\u533a\u5206\u6a21\u5757\u7684\u529f\u80fd\u5b9e\u73b0\u548c\u53ef\u6267\u884c\u4ee3\u7801\u3002<\/li>\n<li><strong>\u65b9\u4fbf\u8fdb\u884c\u5355\u5143\u6d4b\u8bd5\u3002<\/strong> \u5728\u6a21\u5757\u4e2d\u653e\u7f6e\u4e00\u4e9b\u5355\u5143\u6d4b\u8bd5\uff0c\u5b83\u4eec\u53ea\u4f1a\u5728\u8be5\u6a21\u5757\u4f5c\u4e3a\u4e3b\u7a0b\u5e8f\u8fd0\u884c\u65f6\u6267\u884c\u3002<\/li>\n<li><strong>\u4fbf\u4e8e\u6784\u5efa\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801\u5e93\u3002<\/strong> \u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\uff0c\u4ee3\u7801\u5e93\u53ef\u80fd\u9700\u8981\u88ab\u91cd\u6784\u6216\u8005\u6269\u5c55\uff0c<code>if __name__ == &#039;__main__&#039;<\/code>\u63d0\u4f9b\u4e86\u4e00\u79cd\u4fdd\u6301\u4ee3\u7801\u6574\u6d01\u7684\u65b9\u5f0f\u3002<\/li>\n<\/ul>\n<p><h3>\u56db\u3001\u66f4\u6df1\u5165\u7684\u7406\u89e3<\/h3>\n<\/p>\n<p><p><strong>\u501f\u52a9<code>if __name__ == &#039;__main__&#039;<\/code>\uff0c\u6211\u4eec\u80fd\u591f\u6784\u5efa\u66f4\u52a0\u7075\u6d3b\u7684\u4ee3\u7801\u7ed3\u6784\uff0c\u5b83\u5141\u8bb8\u6a21\u5757\u4ee5\u4e0d\u540c\u7684\u65b9\u5f0f\u88ab\u8fd0\u884c\u548c\u88ab\u4f7f\u7528\u3002<\/strong> \u79cd\u65b9\u5f0f\u4f7f\u5f97Python\u6a21\u5757\u5373\u53ef\u4f5c\u4e3a\u811a\u672c\u6267\u884c\u3001\u4e5f\u53ef\u4f5c\u4e3a\u5e93\u7684\u4e00\u90e8\u5206\u88ab\u5bfc\u5165\u548c\u8c03\u7528\u3002<\/p>\n<\/p>\n<p><h4>\u5b9e\u7528\u63d0\u793a<\/h4>\n<\/p>\n<ul>\n<li>\u4f7f\u7528\u8fd9\u79cd\u6a21\u5f0f\uff0c\u53ef\u4ee5\u4f7f\u5f97\u4ee3\u7801\u5728\u8fd0\u884c\u65f6\u4e0e\u88ab\u5bfc\u5165\u65f6\u6709\u4e0d\u540c\u7684\u884c\u4e3a\u3002<\/li>\n<li>\u5bf9\u4e8e\u5927\u578b\u7684Python\u9879\u76ee\uff0c\u8fd9\u79cd\u6a21\u5f0f\u6709\u52a9\u4e8e\u63d0\u9ad8\u4ee3\u7801\u7684\u7ec4\u7ec7\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/li>\n<\/ul>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>\u95ee\u98981\uff1a\u5982\u4f55\u6b63\u786e\u7406\u89e3Python\u4e2d\u7684 if <strong>name<\/strong> == &#039;<strong>main<\/strong>&#039;\uff1f<\/strong><\/p>\n<p>\u7b54\uff1a<a href=\"https:\/\/derekzhang06.github.io\/2020\/06\/12\/if_name_main\/\">if <strong>name<\/strong> == &#039;<strong>main<\/strong>&#039;<\/a>\u662fPython\u4e2d\u5e38\u89c1\u7684\u7528\u6cd5\uff0c\u5b83\u7528\u4e8e\u5224\u65ad\u5f53\u524d\u6a21\u5757\u662f\u88ab\u5bfc\u5165\u6267\u884c\u8fd8\u662f\u76f4\u63a5\u6267\u884c\u3002\u5f53\u4e00\u4e2aPython\u811a\u672c\u88ab\u76f4\u63a5\u6267\u884c\u65f6\uff0c\u89e3\u91ca\u5668\u4f1a\u5c06\u7279\u6b8a\u53d8\u91cf__name__\u8bbe\u7f6e\u4e3a&#039;<strong>main<\/strong>&#039;\uff1b\u800c\u5f53\u8fd9\u4e2a\u811a\u672c\u88ab\u5bfc\u5165\u4e3a\u6a21\u5757\u65f6\uff0c__name__\u5c31\u4f1a\u88ab\u8bbe\u7f6e\u4e3a\u811a\u672c\u7684\u6587\u4ef6\u540d\u3002\u901a\u8fc7\u4f7f\u7528if <strong>name<\/strong> == &#039;<strong>main<\/strong>&#039;\u8fd9\u4e2a\u6761\u4ef6\u5224\u65ad\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4e00\u4e9b\u5728\u811a\u672c\u76f4\u63a5\u6267\u884c\u65f6\u9700\u8981\u6267\u884c\u7684\u4ee3\u7801\u5757\u653e\u5728\u5176\u4e2d\uff0c\u4ee5\u907f\u514d\u5728\u5bfc\u5165\u65f6\u88ab\u6267\u884c\u3002<\/p>\n<p><strong>\u95ee\u98982\uff1a\u5982\u4f55\u5229\u7528 if <strong>name<\/strong> == &#039;<strong>main<\/strong>&#039; \u8fdb\u884c\u4ee3\u7801\u8c03\u8bd5\uff1f<\/strong><\/p>\n<p>\u7b54\uff1a\u5f53\u6211\u4eec\u5728Python\u4ee3\u7801\u4e2d\u4f7f\u7528if <strong>name<\/strong> == 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[&hellip;]","protected":false},"author":3,"featured_media":303649,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/303630"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=303630"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/303630\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/303649"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=303630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=303630"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=303630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}