{"id":2187,"date":"2017-05-09T11:22:04","date_gmt":"2017-05-09T03:22:04","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=2187"},"modified":"2017-05-09T11:22:04","modified_gmt":"2017-05-09T03:22:04","slug":"python%e5%9f%ba%e7%a1%8003-%e5%ba%8f%e5%88%97","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/jishu\/python\/python%e5%9f%ba%e7%a1%8003-%e5%ba%8f%e5%88%97\/","title":{"rendered":"Python\u57fa\u784003 \u5e8f\u5217"},"content":{"rendered":"

sequence \u5e8f\u5217<\/h3>\n

sequence(\u5e8f\u5217)\u662f\u4e00\u7ec4\u6709\u987a\u5e8f\u7684\u5143\u7d20\u7684\u96c6\u5408<\/p>\n

(\u4e25\u683c\u7684\u8bf4\uff0c\u662f\u5bf9\u8c61\u7684\u96c6\u5408\uff0c\u4f46\u9274\u4e8e\u6211\u4eec\u8fd8\u6ca1\u6709\u5f15\u5165\u201c\u5bf9\u8c61\u201d\u6982\u5ff5\uff0c\u6682\u65f6\u8bf4\u5143\u7d20)<\/p>\n

 <\/p>\n

\u5e8f\u5217\u53ef\u4ee5\u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\uff0c\u4e5f\u53ef\u4ee5\u6ca1\u6709\u4efb\u4f55\u5143\u7d20\u3002<\/p>\n

\u6211\u4eec\u4e4b\u524d\u6240\u8bf4\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff0c\u90fd\u53ef\u4ee5\u4f5c\u4e3a\u5e8f\u5217\u7684\u5143\u7d20\u3002\u5143\u7d20\u8fd8\u53ef\u4ee5\u662f\u53e6\u4e00\u4e2a\u5e8f\u5217\uff0c\u4ee5\u53ca\u6211\u4eec\u4ee5\u540e\u8981\u4ecb\u7ecd\u7684\u5176\u4ed6\u5bf9\u8c61\u3002<\/p>\n

 <\/p>\n

\u5e8f\u5217\u6709\u4e24\u79cd\uff1atuple\uff08\u5b9a\u503c\u8868\uff1b \u4e5f\u6709\u7ffb\u8bd1\u4e3a\u5143\u7ec4\uff09 \u548c list (\u8868)<\/p>\n

>>>s1 = (2, 1.3, ‘love’, 5.6, 9, 12, False)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # s1\u662f\u4e00\u4e2atuple<\/p>\n

>>>s2 = [True, 5, ‘smile’]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # s2\u662f\u4e00\u4e2alist<\/p>\n

>>>print(s1,type(s1))<\/p>\n

>>>print(s2,type(s2))<\/p>\n

tuple\u548clist\u7684\u4e3b\u8981\u533a\u522b\u5728\u4e8e\uff0c\u4e00\u65e6\u5efa\u7acb\uff0ctuple\u7684\u5404\u4e2a\u5143\u7d20\u4e0d\u53ef\u518d\u53d8\u66f4\uff0c\u800clist\u7684\u5404\u4e2a\u5143\u7d20\u53ef\u4ee5\u518d\u53d8\u66f4\u3002<\/p>\n

\u4e00\u4e2a\u5e8f\u5217\u4f5c\u4e3a\u53e6\u4e00\u4e2a\u5e8f\u5217\u7684\u5143\u7d20<\/p>\n

>>>s3 = [1,[3,4,5]]<\/p>\n

\u7a7a\u5e8f\u5217<\/p>\n

>>>s4 = []<\/p>\n

 <\/p>\n

\u5143\u7d20\u7684\u5f15\u7528<\/h3>\n

\u5e8f\u5217\u5143\u7d20\u7684\u4e0b\u6807\u4ece0\u5f00\u59cb\uff1a<\/p>\n

>>>print(s1[0])<\/p>\n

>>>print(s2[2])<\/p>\n

>>>print(s3[1][2])<\/p>\n

\u7531\u4e8elist\u7684\u5143\u7d20\u53ef\u53d8\u66f4\uff0c\u4f60\u53ef\u4ee5\u5bf9list\u7684\u67d0\u4e2a\u5143\u7d20\u8d4b\u503c\uff1a<\/p>\n

>>>s2[1] = 3.0<\/p>\n

>>>print(s2)<\/p>\n

\u5982\u679c\u4f60\u5bf9tuple\u505a\u8fd9\u6837\u7684\u64cd\u4f5c\uff0c\u4f1a\u5f97\u5230\u9519\u8bef\u63d0\u793a\u3002<\/p>\n

\u6240\u4ee5\uff0c\u53ef\u4ee5\u770b\u5230\uff0c\u5e8f\u5217\u7684\u5f15\u7528\u901a\u8fc7s[<int>]\u5b9e\u73b0\uff0c int\u4e3a\u4e0b\u6807<\/p>\n

 <\/p>\n

\u5176\u4ed6\u5f15\u7528\u65b9\u5f0f<\/h3>\n

\u8303\u56f4\u5f15\u7528\uff1a \u57fa\u672c\u6837\u5f0f[\u4e0b\u9650:\u4e0a\u9650:\u6b65\u957f]<\/p>\n

>>>print(s1[:5])\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0# \u4ece\u5f00\u59cb\u5230\u4e0b\u68074 \uff08\u4e0b\u68075\u7684\u5143\u7d20 \u4e0d\u5305\u62ec\u5728\u5185\uff09<\/p>\n

>>>print(s1[2:])\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # \u4ece\u4e0b\u68072\u5230\u6700\u540e<\/p>\n

>>>print(s1[0:5:2]) \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # \u4ece\u4e0b\u68070\u5230\u4e0b\u68074 (\u4e0b\u68075\u4e0d\u5305\u62ec\u5728\u5185)\uff0c\u6bcf\u96942\u53d6\u4e00\u4e2a\u5143\u7d20 \uff08\u4e0b\u6807\u4e3a0\uff0c2\uff0c4\u7684\u5143\u7d20\uff09<\/p>\n

>>>print(s1[2:0:-1]) \u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 # \u4ece\u4e0b\u68072\u5230\u4e0b\u68071<\/p>\n

\u4ece\u4e0a\u9762\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u8303\u56f4\u5f15\u7528\u7684\u65f6\u5019\uff0c\u5982\u679c\u5199\u660e\u4e0a\u9650\uff0c\u90a3\u4e48\u8fd9\u4e2a\u4e0a\u9650\u672c\u8eab\u4e0d\u5305\u62ec\u5728\u5185\u3002<\/p>\n

\u5c3e\u90e8\u5143\u7d20\u5f15\u7528<\/p>\n

>>>print(s1[-1]) \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # \u5e8f\u5217\u6700\u540e\u4e00\u4e2a\u5143\u7d20<\/p>\n

>>>print(s1[-3])\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # \u5e8f\u5217\u5012\u6570\u7b2c\u4e09\u4e2a\u5143\u7d20<\/p>\n

\u540c\u6837\uff0c\u5982\u679cs1[0:-1], \u90a3\u4e48\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u4e0d\u4f1a\u88ab\u5f15\u7528 \uff08\u518d\u4e00\u6b21\uff0c\u4e0d\u5305\u62ec\u4e0a\u9650\u5143\u7d20\u672c\u8eab\uff09<\/p>\n

 <\/p>\n

\u5b57\u7b26\u4e32\u662f\u5143\u7ec4<\/h3>\n

\u5b57\u7b26\u4e32\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u5143\u7ec4\uff0c\u56e0\u6b64\u53ef\u4ee5\u6267\u884c\u5143\u7ec4\u7684\u76f8\u5173\u64cd\u4f5c\u3002<\/p>\n

>>>str = ‘abcdef’<\/p>\n

>>>print(str[2:4])<\/p>\n

 <\/p>\n

\u603b\u7ed3<\/h3>\n

tuple\u5143\u7d20\u4e0d\u53ef\u53d8\uff0clist\u5143\u7d20\u53ef\u53d8<\/p>\n

\u5e8f\u5217\u7684\u5f15\u7528 s[2], s[1:8:2]<\/p>\n

\u5b57\u7b26\u4e32\u662f\u4e00\u79cdtuple<\/p>\n

 <\/p>\n

\u4f5c\u8005\uff1aVamei \u51fa\u5904\uff1ahttps:\/\/www.cnblogs.com\/vamei<\/p>\n

 <\/p>\n

<\/div>\n","protected":false},"excerpt":{"rendered":"

sequence \u5e8f\u5217 sequence(\u5e8f\u5217)\u662f\u4e00\u7ec4\u6709\u987a\u5e8f\u7684\u5143\u7d20\u7684\u96c6\u5408 (\u4e25\u683c\u7684\u8bf4\uff0c\u662f\u5bf9\u8c61\u7684\u96c6\u5408\uff0c\u4f46\u9274\u4e8e\u6211\u4eec … \u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[654],"tags":[],"class_list":["post-2187","post","type-post","status-publish","format-standard","hentry","category-python"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2187","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/comments?post=2187"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2187\/revisions"}],"predecessor-version":[{"id":2188,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2187\/revisions\/2188"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/media?parent=2187"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/categories?post=2187"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/tags?post=2187"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}