{"id":50059,"date":"2023-08-21T21:59:37","date_gmt":"2023-08-21T13:59:37","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=50059"},"modified":"2023-08-21T21:59:40","modified_gmt":"2023-08-21T13:59:40","slug":"python%e9%87%8c%e4%bb%a3%e8%a1%a8%e4%bb%80%e4%b9%88%e6%84%8f%e6%80%9d","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/50059.html","title":{"rendered":"Python\u91cc[]\u4ee3\u8868\u4ec0\u4e48\u610f\u601d"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote\">\n<p>\u5728Python\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0c\u65b9\u62ec\u53f7\uff08[]\uff09\u5177\u6709\u591a\u91cd\u542b\u4e49\uff0c\u4e3b\u8981\u5305\u62ec\u4e09\u4e2a\u65b9\u9762\uff1a1\u3001\u5b9a\u4e49\u5217\u8868\uff1b2\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\uff1b3\u3001\u7d22\u5f15\u548c\u5207\u7247\u3002\u5b9a\u4e49\u5217\u8868\u662f\u6307\uff0c\u65b9\u62ec\u53f7\u5728Python\u4e2d\u7528\u4e8e\u5b9a\u4e49\u5217\u8868\uff0c\u5217\u8868\u662f\u4e00\u79cd\u53ef\u53d8\u7684\u3001\u6709\u5e8f\u7684\u6570\u636e\u7ed3\u6784\u3002\u4f8b\u5982\uff0c<code>[]<\/code> \u662f\u4e00\u4e2a\u7a7a\u5217\u8868\uff0c<code>[1, 2, 3]<\/code> \u662f\u5305\u542b\u4e09\u4e2a\u6574\u6570\u7684\u5217\u8868\u3002<\/p>\n<\/blockquote>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"680\" height=\"421\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/08\/pingcode\u6b63\u6587-25-3.jpg?x-oss-process=image\/auto-orient,1\/format,webp\" alt=\"\" class=\"wp-image-50061\" srcset=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/08\/pingcode\u6b63\u6587-25-3.jpg 680w, https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/08\/pingcode\u6b63\u6587-25-3-300x186.jpg 300w\" sizes=\"(max-width: 680px) 100vw, 680px\" \/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e00\u3001\u5b9a\u4e49\u5217\u8868<\/strong><\/h2>\n\n\n\n<p>\u65b9\u62ec\u53f7\u5728Python\u4e2d\u7528\u4e8e\u5b9a\u4e49\u5217\u8868\uff0c\u5217\u8868\u662f\u4e00\u79cd\u53ef\u53d8\u7684\u3001\u6709\u5e8f\u7684\u6570\u636e\u7ed3\u6784\u3002\u4f8b\u5982\uff0c<code>[]<\/code> \u662f\u4e00\u4e2a\u7a7a\u5217\u8868\uff0c<code>[1, 2, 3]<\/code> \u662f\u5305\u542b\u4e09\u4e2a\u6574\u6570\u7684\u5217\u8868\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e8c\u3001\u5217\u8868\u63a8\u5bfc\u5f0f<\/strong><\/h2>\n\n\n\n<p>\u5217\u8868\u63a8\u5bfc\u5f0f\u662fPython\u4e2d\u4e00\u79cd\u4f18\u96c5\u7684\u6784\u9020\u5217\u8868\u7684\u65b9\u5f0f\u3002\u4f8b\u5982\uff0c<code>[x**2 for x in range(10)]<\/code> \u4f1a\u751f\u62100\u52309\u7684\u5e73\u65b9\u7684\u5217\u8868\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e09\u3001\u7d22\u5f15\u548c\u5207\u7247<\/strong><\/h2>\n\n\n\n<p>\u65b9\u62ec\u53f7\u8fd8\u7528\u4e8e\u7d22\u5f15\u548c\u5207\u7247\u64cd\u4f5c\uff0c\u4e0d\u4ec5\u9002\u7528\u4e8e\u5217\u8868\uff0c\u8fd8\u9002\u7528\u4e8e\u5b57\u7b26\u4e32\u3001\u5143\u7ec4\u7b49\u5e8f\u5217\u7c7b\u578b\u3002<\/p>\n\n\n\n<ol>\n<li><strong>\u7d22\u5f15<\/strong>: \u901a\u8fc7\u65b9\u62ec\u53f7\u5185\u7684\u6574\u6570\u7d22\u5f15\uff0c\u53ef\u4ee5\u8bbf\u95ee\u5217\u8868\u6216\u5176\u4ed6\u5e8f\u5217\u7c7b\u578b\u7684\u7279\u5b9a\u5143\u7d20\u3002\u4f8b\u5982\uff0c<code>my_list[2]<\/code> \u8bbf\u95ee\u5217\u8868<code>my_list<\/code>\u7684\u7b2c\u4e09\u4e2a\u5143\u7d20\u3002<\/li>\n\n\n\n<li><strong>\u5207\u7247<\/strong>: \u4f7f\u7528\u65b9\u62ec\u53f7\u548c\u5192\u53f7\uff0c\u53ef\u4ee5\u8bbf\u95ee\u5e8f\u5217\u7684\u4e00\u4e2a\u5b50\u96c6\u3002\u4f8b\u5982\uff0c<code>my_list[1:3]<\/code> \u8bbf\u95ee\u5217\u8868<code>my_list<\/code>\u7684\u7b2c\u4e8c\u548c\u7b2c\u4e09\u4e2a\u5143\u7d20\u3002<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\" \/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u5e38\u89c1\u95ee\u7b54<\/strong><\/h2>\n\n\n\n<ul>\n<li><strong>1.\u6211\u53ef\u4ee5\u5728\u65b9\u62ec\u53f7\u5185\u4f7f\u7528\u8d1f\u6570\u5417\uff1f<\/strong><\/li>\n\n\n\n<li>\u662f\u7684\uff0c\u8d1f\u6570\u7d22\u5f15\u8868\u793a\u4ece\u5e8f\u5217\u7684\u672b\u5c3e\u5f00\u59cb\u8ba1\u6570\u3002\u4f8b\u5982\uff0c<code>my_list[-1]<\/code> \u8fd4\u56de\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n\n\n\n<li><strong>2.\u5217\u8868\u63a8\u5bfc\u5f0f\u80fd\u5426\u5305\u62ec\u6761\u4ef6\u8bed\u53e5\uff1f<\/strong><\/li>\n\n\n\n<li>\u53ef\u4ee5\u7684\uff0c\u5217\u8868\u63a8\u5bfc\u5f0f\u53ef\u4ee5\u5305\u62ec\u6761\u4ef6\u8fc7\u6ee4\u3002\u4f8b\u5982\uff0c<code>[x for x in range(10) if x % 2 == 0]<\/code> \u4f1a\u751f\u62100\u52309\u7684\u5076\u6570\u5217\u8868\u3002<\/li>\n\n\n\n<li><strong>3.\u9664\u4e86\u5217\u8868\uff0c\u8fd8\u6709\u54ea\u4e9b\u6570\u636e\u7c7b\u578b\u4f7f\u7528\u65b9\u62ec\u53f7\uff1f<\/strong><\/li>\n\n\n\n<li>\u9664\u4e86\u5217\u8868\u5916\uff0c\u6570\u7ec4\u3001\u6570\u636e\u5e27\uff08\u5982pandas\u7684DataFrame\uff09\u548cNumPy\u6570\u7ec4\u7b49\u4e5f\u53ef\u4ee5\u4f7f\u7528\u65b9\u62ec\u53f7\u8fdb\u884c\u7d22\u5f15\u548c\u5207\u7247\u3002<\/li>\n\n\n\n<li><strong>4.\u65b9\u62ec\u53f7\u5728\u5b57\u5178\u4e2d\u6709\u4ec0\u4e48\u4f5c\u7528\uff1f<\/strong><\/li>\n\n\n\n<li>\u5728\u5b57\u5178\u4e2d\uff0c\u65b9\u62ec\u53f7\u7528\u4e8e\u901a\u8fc7\u952e\u8bbf\u95ee\u5bf9\u5e94\u7684\u503c\u3002\u4f8b\u5982\uff0c<code>my_dict['key']<\/code> \u8bbf\u95ee\u5b57\u5178<code>my_dict<\/code>\u4e2d\u4e0e\u952e <code>'key'<\/code> \u76f8\u5173\u8054\u7684\u503c\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0c\u65b9\u62ec\u53f7\uff08[]\uff09\u5177\u6709\u591a\u91cd\u542b\u4e49\uff0c\u4e3b\u8981\u5305\u62ec\u4e09\u4e2a\u65b9\u9762\uff1a1\u3001\u5b9a\u4e49\u5217\u8868\uff1b2\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\uff1b3\u3001\u7d22\u5f15 [&hellip;]","protected":false},"author":6,"featured_media":50060,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[1861,1862,1863,1859,1860,363],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/50059"}],"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\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=50059"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/50059\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/50060"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=50059"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=50059"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=50059"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}