{"id":30,"date":"2016-03-20T18:23:50","date_gmt":"2016-03-20T10:23:50","guid":{"rendered":"http:\/\/5x44.cn\/?p=30"},"modified":"2016-03-22T15:02:01","modified_gmt":"2016-03-22T07:02:01","slug":"%e7%ac%ac%e4%ba%8c%e7%ab%a0-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%ef%bc%882%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.5x44.cn\/?p=30","title":{"rendered":"\u7b2c\u4e8c\u7ae0 \u6570\u636e\u7c7b\u578b\uff082\uff09"},"content":{"rendered":"

1\uff09tuple\u662f\u4e00\u65e6\u5efa\u7acb\u4fbf\u4e0d\u53ef\u4fee\u6539\u7684\u5217\u8868\uff0c\u5efa\u7acb\u65b9\u6cd5\u548c\u5217\u8868\u4e00\u6837\uff0c\u53ea\u4e0d\u8fc7list\u7528\u65b9\u62ec\u53f7\uff0ctuple\u7528\u5706\u62ec\u53f7\uff1a
\n>>>a_tuple = (‘a’, ‘b’, ‘mpligrim’, ‘example’)
\n\uff082\uff09\u9664\u4e86\u4fee\u6539\u64cd\u4f5c\uff0ctuple\u548clist\u4e00\u6837\u3002
\n\uff083\uff09tuple\u7684\u4f18\u70b9\u662f\u6bd4list\u901f\u5ea6\u66f4\u5feb\uff0c\u53ef\u7528\u4e8e\u8fed\u4ee3\u3002tuple\u4e5f\u53ef\u4ee5\u505a\u4e3adictionary\u7684key\uff0c\u4f46list\u4e0d\u884c\uff0c\u56e0\u4e3adictionary\u7684key\u8981\u6c42\u662f\u4e0d\u53ef\u4fee\u6539\u7684\u503c\u3002
\n\uff084\uff09list\u548ctuple\u53ef\u4ee5\u4e92\u76f8\u8f6c\u6362\uff0c\u4f7f\u7528tuple(a_list)\u53ef\u4ee5\u5c06list\u8f6c\u6362\u6210tuple\uff1blist(a_tuple)\u53ef\u4ee5\u5c06tuple\u8f6c\u6362\u6210list\u3002\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u90fd\u4e0d\u4f1a\u4fee\u6539\u539f\u6709\u7684\u503c\uff0c\u53ea\u662f\u4f7f\u7528\u539f\u6709\u7684\u503c\u5efa\u7acb\u65b0\u7684\u5bf9\u8c61\u3002
\n\uff085\uff09\u5efa\u7acb\u7a7atuple\u53ea\u8981\u4e00\u5bf9\u5706\u62ec\u53f7\u5c31\u53ef\u4ee5\uff0c\u4f46\u5efa\u7acb\u53ea\u6709\u4e00\u4e2a\u503c\u7684tuple\u987b\u8981\u5728\u552f\u4e00\u7684\u503c\u540e\u52a0\u4e0a\u4e00\u4e2a\u9017\u53f7\uff0c\u5982\u679c\u4e0d\u52a0\u9017\u53f7\u867d\u7136\u4e0d\u4f1a\u51fa\u9519\u4f46\u5e76\u4e0d\u80fd\u5efa\u7acbtuple\u3002
\na_tuple=()#\u7a7atuple
\na_tuple=(‘only one’,)#\u53ea\u6709\u4e00\u4e2a\u503c\u7684tuple
\n\uff086\uff09python\u652f\u6301\u4e00\u6b21\u5411\u591a\u4e2a\u53d8\u91cf\u8d4b\u503c\uff0c\u5982\uff1a
\n>>>v=(‘a’, 2, True)
\n>>>(x, y, z) = v #(x, y, z)\u662f\u4e00\u4e2atuple\uff0c\u7528(‘a’, 2, True)\u4e09\u4e2a\u503c\u6765\u521d\u59cb\u5316(x, y, z)
\n>>>(x, y, z) = range(3) #\u8303\u56f4\u4ece0~2
\n>>>x, y, z = rang(3) #\u540c\u6837\u8303\u56f4\u4ece0~2\uff0c\u4e0d\u540c\u7684\u662f\u8fd9\u91cc\u6709\u4e09\u4e2a\u53d8\u91cf\u53ef\u4ee5\u6539\u53d8\u503c\uff0c\u800c\u4e0a\u9762\u7684\u4f8b\u5b50\u53ef\u4ee5\u7406\u89e3\u6210\u75280~2\u521d\u59cb\u5316\u4e86\u4e09\u4e2a\u53d8\u91cf\uff0c\u53c8\u7528\u4e09\u4e2a\u53d8\u91cf\u521d\u59cb\u5316\u4e86\u4e00\u4e2atuple\uff0ctuple\u5f53\u7136\u662f\u4e0d\u80fd\u4fee\u6539\u7684\uff0c\u4f46\u53d8\u91cf\u662f\u53ef\u4ee5\u4fee\u6539\u7684\u3002
\n\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5\u53ef\u4ee5\u7528\u4e8e\u5728\u51fd\u6570\u4e2d\u8fd4\u56de\u591a\u4e2a\u503c\u3002
\n\uff087\uff09set\u4e2d\u5b58\u653e\u7684\u503c\u662f\u65e0\u5e8f\u7684\u3001\u552f\u4e00\u7684\u3001\u4e0d\u53ef\u4fee\u6539\u7684\u3002\u4e24\u4e2aset\u53ef\u4ee5\u8fdb\u884c\u5e76\u3001\u4ea4\u3001\u5dee\u96c6\u64cd\u4f5c\u3002
\n\uff088\uff09set\u7684\u5b9a\u4e49\u4f7f\u7528\u82b1\u62ec\u53f7\uff0c\u6bcf\u4e2a\u503c\u7528\u9017\u53f7\u5206\u9694\u3002\u53ef\u4ee5\u4f7f\u7528set()\u51fd\u6570\u901a\u8fc7\u4e00\u4e2alist\u6765\u5efa\u7acb\u4e00\u4e2aset\u3002
\n\uff089\uff09\u4e0d\u80fd\u4f7f\u7528\u4e00\u5bf9\u82b1\u62ec\u53f7\u5efa\u7acb\u7a7aset\uff0c\u56e0\u4e3a\u90a3\u6837\u4f1a\u5efa\u7acb\u4e00\u4e2a\u7a7a\u7684dictionary\u3002
\n\uff0810\uff09\u5411\u5df2\u5b58\u5728\u7684set\u4e2d\u6dfb\u52a0\u503c\uff0c\u6709\u4e24\u4e2a\u65b9\u6cd5\uff08set\u4e2d\u4e0d\u80fd\u6709\u91cd\u590d\u7684\u503c\uff0c\u5982\u679c\u6709\u91cd\u590d\u7684\u503c\uff0c\u4e0d\u4f1a\u5f15\u53d1\u9519\u8bef\uff0c\u53ea\u4f1a\u9ed8\u9ed8\u5ffd\u7565\uff09\uff1a
\n1\uff09add()\u6dfb\u52a0\u5355\u4e2a\u503c
\n2\uff09update()\u6dfb\u52a0\u591a\u4e2a\u96c6\uff0c\u96c6\u4e0e\u96c6\u4e4b\u95f4\u7528\u9017\u53f7\u9694\u5f00\u3002
\n\uff0811\uff09\u4ece\u5df2\u5b58\u5728\u7684set\u4e2d\u5220\u9664\u503c\uff0c\u6709\u56db\u4e2a\u65b9\u6cd5\uff1a
\n1\uff09discard()#\u4eceset\u4e2d\u5220\u9664\u4e00\u4e2a\u503c\uff0c\u5982\u679c\u503c\u4e0d\u5b58\u5728\u7684\u8bdd\uff0c\u4ec0\u4e48\u4e5f\u4e0d\u505a\u3002
\n2\uff09remove()#\u4eceset\u4e2d\u5220\u9664\u4e00\u4e2a\u503c\uff0c\u5982\u679c\u503c\u4e0d\u5b58\u5728\u7684\u8bdd\uff0c\u5f15\u53d1\u4e00\u4e2aKeyError\u5f02\u5e38\u3002
\n3\uff09pop()\u662f\u968f\u673a\u5220\u9664\u4e00\u4e2a\u503c\uff0c\u5982\u679cset\u4e3a\u7a7a\uff0c\u5f15\u53d1\u4e00\u4e2aKeyError\u5f02\u5e38\u3002
\n4\uff09clear()\u6e05\u7a7aset\u4e2d\u6240\u6709\u503c\uff0c\u7b49\u4e8ea_set=set()
\n\uff0812\uff09\u4f7f\u7528in\u64cd\u4f5c\u7b26\u5728set\u4e2d\u641c\u7d22\u3002
\n\uff0813\uff09a_set.union(b_set)#\u8fd4\u56de\u4e00\u4e2a\u65b0\u96c6\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u4e24\u4e2a\u96c6\u4e2d\u6240\u6709\u7684\u503c\uff08\u65e0\u91cd\u590d\uff09\u3002
\n\uff0814\uff09a_set.intersection(b_set)#\u8fd4\u56de\u4e00\u4e2a\u65b0\u96c6\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u4e24\u4e2a\u96c6\u4e2d\u90fd\u5b58\u5728\u7684\u503c\u3002
\n\uff0815\uff09a_set.difference(b_set)#\u8fd4\u56de\u4e00\u4e2a\u65b0\u96c6\uff0c\u5176\u4e2d\u5305\u542b\u7684\u503c\u5728A\u96c6\u4e2d\u4f46\u4e0d\u5728B\u96c6\u4e2d\u3002
\n\uff0816\uff09a_set.symmetric_difference(b_set)#\u8fd4\u56de\u4e00\u4e2a\u65b0\u96c6\uff0c\u8be5\u96c6\u4e2d\u4e0d\u5305\u542bA\u548cB\u7684\u4ea4\u96c6\u3002<\/p>\n

\uff0817\uff09a_set.issubset(b_set)#A\u96c6\u662f\u5426\u662fB\u96c6\u7684\u5b50\u96c6\uff0c\u8fd4\u56de\u5e03\u5c14\u503c\u3002<\/p>\n

\uff0818\uff09a_set.issuperset(b_set)#A\u96c6\u662f\u5426\u662fB\u96c6\u7684\u8d85\u96c6\uff0c\u8fd4\u56de\u5e03\u5c14\u503c<\/p>\n

\uff0819\uff09\u5728\u201c\u5e03\u5c14\u4e0a\u4e0b\u6587\u201d\u4e2d\u4efb\u4f55\u7a7a\u96c6\u4e3aFalse\uff0c\u96c6\u5408\u4e2d\u6709\u4efb\u4f55\u503c\uff0c\u65e0\u8bba\u4f55\u503c\uff0c\u90fd\u662fTrue\u3002<\/p>\n

\uff0820\uff09dictionary\u662f\u4e00\u4e2a\u65e0\u5e8f\u7684\u201c\u952e-\u503c\u201d\u5bf9\uff0c\u5f53\u4f60\u6dfb\u52a0\u4e00\u4e2akey\u5230dictionary\u7684\u540c\u65f6\u5fc5\u987b\u8981\u6dfb\u52a0\u4e00\u4e2a\u5bf9\u5e94\u7684\u503c\uff08\u901a\u8fc7\u952e\u6765\u67e5\u627e\u503c\uff0c\u8fd9\u4e2a\u503c\u4e4b\u540e\u53ef\u4ee5\u4fee\u6539\uff0c\u4f46\u952e\u4e0d\u80fd\u6539\uff09\uff0c\u5efa\u7acb\u65b9\u6cd5\u548cSET\u7684\u65b9\u6cd5\u5dee\u4e0d\u591a\uff0c\u4f8b\u5982\uff1a
\na_dict = {‘server’:’db.diveintopython3.org’, ‘database’: ‘mysql’}
\n>>>a_dict[server]
\n‘db.diveintopython3.org’<\/p>\n

\uff0821\uff09dictionary\u6ca1\u6709\u4efb\u4f55\u9884\u7f6e\u7684\u5927\u5c0f\u9650\u5236\uff0c\u53ef\u4ee5\u5728\u4efb\u4f55\u65f6\u95f4\u5bf9dictionary\u8fdb\u884c\u4fee\u6539\uff0c\u5982\uff1a
\na_dict[‘server’]=’5×44.cn’#\u4fee\u6539\u5df2\u5b58\u5728\u7684\u503c
\na_dict[‘user’]=’mark’#\u6dfb\u52a0\u65b0\u503c<\/p>\n

\uff0822\uff09dictionary\u4e2d\u4e0d\u80fd\u6709\u91cd\u590d\u7684\u952e\u3002<\/p>\n

\uff0823\uff09dictionary\u4e2d\u7684\u952e\u662f\u5927\u5c0f\u5199\u654f\u611f\u7684\u3002<\/p>\n

\uff0824\uff09dictionary\u4e2d\u7684\u503c\u53ef\u4ee5\u662f\u4efb\u4f55\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u540c\u4e00\u4e2a\u201c\u5b57\u5178\u201d\u4e2d\u7684\u503c\uff0c\u53ef\u4ee5\u7531\u4e0d\u540c\u7c7b\u578b\u7684\u503c\u7ec4\u6210\uff1b\u952e\u7684\u8981\u6c42\u8981\u6bd4\u503c\u9ad8\u4e00\u4e9b\uff0c\u4f46\u53ea\u8981\u662f\u4e0d\u53ef\u4fee\u6539\u7684\u503c\u5c31\u53ef\u4ee5\uff0c\u540c\u6837\uff0c\u540c\u4e00\u201c\u5b57\u5178\u201d\u4e2d\u7684\u503c\u4e0d\u7528\u540c\u4e00\u7c7b\u578b\u3002<\/p>\n

\uff0825\uff09dictionary\u53ef\u4ee5\u4f7f\u7528len()\u51fd\u6570\u6d4b\u8bd5\u201c\u5b57\u5178\u201d\u4e2d\u6709\u51e0\u4e2a\u5143\u7d20\uff0c\u540c\u6837\u53ef\u4ee5\u4f7f\u7528in\u6765\u6d4b\u8bd5\u67d0\u4e2a\u952e\u662f\u5426\u5728\u5b57\u5178\u4e2d\u3002<\/p>\n

\uff0826\uff09dictionary\u4e2d\u6709\u4efb\u4f55\u503c\uff0c\u5b83\u7684\u5e03\u5c14\u4e0a\u4e0b\u6587\u5747\u4e3atrue\u3002<\/p>\n

\uff0827\uff09\u5728python\u4e2dNone\u662f\u4e00\u4e2a\u7279\u6b8a\u5e38\u91cf\uff0cNone\u4e0d\u540c\u4e8eFalse\uff0c\u4e5f\u4e0d\u662f0\uff0c\u66f4\u4e0d\u662f\u7a7a\u5b57\u7b26\u4e32\u3002None\u548c\u5176\u5b83\u4efb\u4f55\u975eNone\u503c\u4e00\u76f4\u8fd4\u56deFalse\u3002None\u53ea\u662f\u4e00\u4e2a\u7a7a\u503c\uff0c\u5b83\u6709\u81ea\u5df1\u7684\u6570\u636e\u7c7b\u578b\u2014\u2014NoneType\u3002\u53ef\u4ee5\u5206\u914dNone\u5230\u4efb\u4f55\u53d8\u91cf\uff0c\u4f46\u662f\u4e0d\u80fd\u521b\u5efaNoneType\u5bf9\u8c61\uff0c\u6240\u6709\u7c7b\u578b\u53d8\u91cf\u7684None\u503c\u662f\u76f8\u7b49\u7684\u3002<\/p>\n

\uff0828\uff09\u5728\u201c\u5e03\u5c14\u4e0a\u4e0b\u6587\u201d\u4e2dNone\u662fFalse\uff0c\u800cnot None\u662fTrue.<\/p>\n","protected":false},"excerpt":{"rendered":"

1\uff09tuple\u662f\u4e00\u65e6\u5efa\u7acb\u4fbf\u4e0d\u53ef\u4fee\u6539\u7684\u5217\u8868\uff0c\u5efa\u7acb\u65b9\u6cd5\u548c\u5217\u8868\u4e00\u6837\uff0c\u53ea\u4e0d\u8fc7list\u7528\u65b9\u62ec\u53f7\uff0ctuple\u7528\u5706\u62ec\u53f7\uff1a >>>a_tuple = (&#8…<\/p>\n

Read More Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[6],"class_list":["post-30","post","type-post","status-publish","format-standard","hentry","category-dive-into-python3","tag-it"],"_links":{"self":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/30","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=30"}],"version-history":[{"count":5,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/30\/revisions"}],"predecessor-version":[{"id":45,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/30\/revisions\/45"}],"wp:attachment":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=30"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=30"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=30"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}