{"id":178060,"date":"2022-04-17T17:26:03","date_gmt":"2022-04-17T09:26:03","guid":{"rendered":"http:\/\/www.idc.net\/help\/178060\/"},"modified":"2022-04-17T17:26:03","modified_gmt":"2022-04-17T09:26:03","slug":"%e5%90%8e%e6%b5%aa%e4%ba%91python%e6%95%99%e7%a8%8b%ef%bc%9apython%e6%80%8e%e4%b9%88%e7%a1%ae%e5%ae%9alist%e6%98%af%e5%90%a6%e4%b8%ba%e7%a9%ba","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/178060\/","title":{"rendered":"\u540e\u6d6a\u4e91Python\u6559\u7a0b\uff1apython\u600e\u4e48\u786e\u5b9alist\u662f\u5426\u4e3a\u7a7a"},"content":{"rendered":"

<\/p>\n

Python\u5224\u65adlist\u662f\u5426\u4e3a\u7a7a\u7684\u65b9\u6cd5\uff1a<\/p>\n

\u901a\u8fc7len()<\/strong><\/p>\n

list_test = []\nif len(list_test):\n    print('list_test \u4e3a\u975e\u7a7alist')  # \u5b58\u5728\u503c\u5373\u4e3aTrue\nelse:\n    print('list_test \u4e3a\u7a7alist')  # \u4e0d\u5b58\u5728\u503c\u5373\u4e3aFALSE<\/pre>\n
\u76f4\u63a5\u901a\u8fc7 if+list \u5224\u65ad<\/strong><\/p>\n
list_test = []\nif list_test:\n    print('list_test \u4e3a\u975e\u7a7alist')  # \u5b58\u5728\u503c\u5373\u4e3aTrue\nelse:\n    print('list_test \u4e3a\u7a7alist')  # \u4e0d\u5b58\u5728\u503c\u5373\u4e3aFALSE<\/pre>\n
<\/strong>\u7528 list == [ ] \u4e5f\u662f\u53ef\u884c\u7684\uff0c\u4e0d\u8fc7\u4f1a\u6709Expression can be simplified\u63d0\u793a<\/strong><\/p>\n
list_test = []\nif list_test == []:\n    print('list_test \u4e3a\u975e\u7a7alist')  # \u5b58\u5728\u503c\u5373\u4e3aTrue\nelse:\n    print('list_test \u4e3a\u7a7alist')  # \u4e0d\u5b58\u5728\u503c\u5373\u4e3aFALSE<\/pre>\n","protected":false},"excerpt":{"rendered":"
Python\u5224\u65adlist\u662f\u5426\u4e3a\u7a7a\u7684\u65b9\u6cd5\uff1a \u901a\u8fc7len() list_test = [] i […]<\/p>\n","protected":false},"author":1,"featured_media":178061,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[182397],"tags":[],"class_list":["post-178060","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/178060","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=178060"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/178060\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media\/178061"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=178060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=178060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=178060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}