{"id":7367,"date":"2023-04-08T22:04:19","date_gmt":"2023-04-08T14:04:19","guid":{"rendered":"https:\/\/www.5x44.cn\/?p=7367"},"modified":"2023-04-08T22:04:19","modified_gmt":"2023-04-08T14:04:19","slug":"%e9%bb%98%e8%ae%a4%e5%8f%82%e6%95%b0%e6%98%af%e5%8f%af%e5%8f%98%e5%af%b9%e8%b1%a1%e3%80%90python%e3%80%91","status":"publish","type":"post","link":"https:\/\/www.5x44.cn\/?p=7367","title":{"rendered":"\u9ed8\u8ba4\u53c2\u6570\u662f\u53ef\u53d8\u5bf9\u8c61\u3010PYTHON\u3011"},"content":{"rendered":"\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-green-cyan-color\">\u201c\u9ed8\u8ba4\u53c2\u6570\u662f\u53ef\u53d8\u5bf9\u8c61\u201d\u8fd9\u4f1a\u5bfc\u81f4\u51fd\u6570\u7684\u9ed8\u8ba4\u53c2\u6570\u5728\u591a\u6b21\u8c03\u7528\u65f6\u5171\u4eab\u540c\u4e00\u4e2a\u5bf9\u8c61<\/mark>\uff0c\u4ece\u800c\u5bfc\u81f4\u610f\u5916\u7684\u7ed3\u679c\u3002\u8fd9\u662f\u56e0\u4e3aPython\u5728\u5b9a\u4e49\u51fd\u6570\u65f6\uff0c\u4f1a\u5c06\u9ed8\u8ba4\u53c2\u6570\u5b58\u50a8\u5728\u51fd\u6570\u5bf9\u8c61\u4e2d\uff08\u4e5f\u5c31\u662f\u5728\u5b9a\u4e49\u9636\u6bb5\u5df2\u7ecf\u4ea7\u751f\u4e86\u4e00\u4e2a\u5b9e\u4f8b\uff09\uff0c\u800c\u4e0d\u662f\u6bcf\u6b21\u8c03\u7528\u51fd\u6570\u65f6\u90fd\u91cd\u65b0\u8ba1\u7b97\u3002\u5982\u679c\u9ed8\u8ba4\u53c2\u6570\u662f\u53ef\u53d8\u5bf9\u8c61\uff0c\u90a3\u4e48\u6bcf\u6b21\u8c03\u7528\u51fd\u6570\u65f6\u90fd\u4f1a\u4fee\u6539\u8fd9\u4e2a\u5bf9\u8c61\uff0c\u4ece\u800c\u5bfc\u81f4\u610f\u5916\u7684\u7ed3\u679c\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def f(l=&#91;]):\r\n    l.append(\"x\")\r\n    print(l)\r\n\r\nf()\n&#91;'x']\r\nf()\n&#91;'x','x']\r\nf()\n&#91;'x','x','x']<\/code><\/pre>\n\n\n\n<p>\u8fd9\u53ef\u80fd\u5e76\u4e0d\u662f\u6211\u4eec\u60f3\u8981\u7684\uff0c\u8981\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u53ef\u4ee5<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4f7f\u7528\u4e0d\u53ef\u53d8\u5bf9\u8c61\u505a\u4e3a\u9ed8\u8ba4\u53c2\u6570<\/mark><\/strong>\uff0c\u6216\u8005\u5728\u51fd\u6570\u5185\u90e8\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u53ef\u53d8\u5bf9\u8c61\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>def f(l=None):\r\n    if l <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">is<\/mark><\/strong> None:\r\n        l = &#91;]\r\n    l.append(\"x\")\r\n    print(l)\r\n\r\nf()\n&#91;'x']\r\nf()\n&#91;'x']\r\nf()\n&#91;'x']<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u201c\u9ed8\u8ba4\u53c2\u6570\u662f\u53ef\u53d8\u5bf9\u8c61\u201d\u8fd9\u4f1a\u5bfc\u81f4\u51fd\u6570\u7684\u9ed8\u8ba4\u53c2\u6570\u5728\u591a\u6b21\u8c03\u7528\u65f6\u5171\u4eab\u540c\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4ece\u800c\u5bfc\u81f4\u610f\u5916\u7684\u7ed3\u679c\u3002\u8fd9\u662f\u56e0\u4e3aPython\u5728\u5b9a\u4e49\u51fd\u6570\u65f6\uff0c\u4f1a\u5c06\u9ed8\u8ba4\u53c2\u6570\u5b58\u50a8\u5728\u51fd\u6570\u5bf9\u8c61\u4e2d\uff08\u4e5f\u5c31&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"https:\/\/www.5x44.cn\/?p=7367\"> Read More<span class=\"screen-reader-text\">  Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-7367","post","type-post","status-publish","format-standard","hentry","category-python3"],"_links":{"self":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/7367","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7367"}],"version-history":[{"count":1,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/7367\/revisions"}],"predecessor-version":[{"id":7368,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/7367\/revisions\/7368"}],"wp:attachment":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}