{"id":1928,"date":"2019-01-24T10:40:50","date_gmt":"2020-02-12T13:56:14","guid":{"rendered":"http:\/\/vip.fxxkpython.com\/?p=1928"},"modified":"2020-02-12T21:56:16","modified_gmt":"2020-02-12T13:56:16","slug":"e822ee3f03","status":"publish","type":"post","link":"https:\/\/vip.fxxkpython.com\/?p=1928","title":{"rendered":"python\u722c\u866b05 | \u5e74\u8f7b\u4eba\uff0c\u4e0d\u4f1a\u6b63\u5219\u8868\u8fbe\u5f0f\u4f60\u7761\u5f97\u7740\u89c9\uff1f\u6709\u70b9\u51fa\u606f\u6ca1\u6709\uff1f"},"content":{"rendered":"
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\u73b0\u5728<\/p>\n


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\u4f60\u5df2\u7ecf\u4f1a\u4f7f\u7528 python \u6a21\u62df\u6d4f\u89c8\u5668<\/p>\n


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\u8fdb\u884c\u4e00\u4e9b Http \u7684\u8bf7\u6c42\u4e86<\/p>\n


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\u90a3\u4e48\u8bf7\u6c42\u5b8c\u4e4b\u540e<\/p>\n


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\u670d\u52a1\u5668\u8fd4\u56de\u7ed9\u6211\u4eec\u4e00\u5806\u6e90\u4ee3\u7801<\/p>\n


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\u6211\u4eec\u53ef\u4e0d\u662f\u5565\u90fd\u8981<\/strong>\u7684\u554a<\/p>\n


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\u6211\u4eec\u662f\u6709\u539f\u5219\u7684<\/p>\n


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\"python\"<\/p>\n


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\u6211\u4eec\u60f3\u8981\u7684\u4e1c\u897f<\/p>\n


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\u600e\u4e48\u80fd\u4e00\u80a1\u8111\u7684\u5565\u90fd\u5f80\u81ea\u5df1\u515c\u91cc\u585e\u5462\uff1f<\/p>\n


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\u4f7f\u4e0d\u5f97<\/p>\n


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\u4f7f\u4e0d\u5f97<\/p>\n


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\u6240\u4ee5<\/p>\n


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\u5728\u670d\u52a1\u5668\u8fd4\u56de\u7ed9\u6211\u4eec\u7684\u6e90\u7801\u4e4b\u4e2d<\/p>\n


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\u6211\u4eec\u8981\u8fc7\u6ee4<\/span><\/p>\n


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\u62ff\u5230\u6211\u4eec\u60f3\u8981\u7684\u5c31\u597d<\/p>\n


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\u5176\u5b83\u5c31\u4e22\u4e00\u65c1<\/p>\n


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\u90a3\u4e48<\/p>\n


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\u6211\u4eec\u5c31\u9700\u8981\u5b66\u4f1a\u600e\u4e48\u4f7f\u7528<\/p>\n


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\u6b63\u5219\u8868\u8fbe\u5f0f<\/strong><\/p>\n


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\u901a\u8fc7\u5b83<\/p>\n


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\u6211\u4eec\u624d\u80fd\u8fc7\u6ee4\u51fa\u6211\u4eec\u60f3\u8981\u7684\u5185\u5bb9<\/p>\n


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…<\/p>\n


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\u63a5\u4e0b\u6765\u5c31\u662f
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\u5b66\u4e60 python \u7684\u6b63\u786e\u59ff\u52bf<\/strong><\/p>\n


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\"python\"<\/p>\n


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\u771f\u9999\u8b66\u544a<\/span><\/p>\n


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\u8fd9\u7bc7\u6587\u7ae0\u4e0d\u9002\u5408\u6025\u6027\u5b50\u7684\u4eba\u770b\uff0c\u8981\u4e0d\u7136\u4f1a\u628a\u624b\u673a\u7838\u4e86\u7684\uff01\u4f46\u662f\uff0c\u5982\u679c\u4f60\u80fd\u770b\u5b8c\uff0c\u90a3\u4e48\u6b63\u5219\u8868\u8fbe\u5f0f\u5bf9\u4f60\u6765\u8bf4\uff0c\u7b97\u4e2a p \u7684\u96be\u5ea6\u554a\uff1f<\/span><\/p>\n


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\u5176\u5b9e<\/p>\n


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\u6b63\u5219\u8868\u8fbe\u5f0f\u4e0d\u4ec5\u4ec5\u9002\u7528\u4e8e python<\/p>\n


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\u5f88\u591a\u7f16\u7a0b\u8bed\u8a00<\/p>\n


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\u5f88\u591a\u5730\u65b9\u90fd\u4f1a\u4f7f\u7528\u5230\u6b63\u5219<\/p>\n


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\u8bd5\u60f3\u4e00\u4e0b<\/p>\n


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\u5982\u4f55\u4ece\u4e0b\u9762\u8fd9\u6bb5\u5b57\u7b26\u4e32\u4e2d\u5feb\u901f\u68c0\u7d22<\/strong>\u6240\u6709\u7684\u6570\u5b57\u51fa\u6765\u5462\uff1f<\/p>\n


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zui12shu234ai45der6en7sh88ixia7898os0huaib<\/p>\n


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\"python\"<\/p>\n


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\u7b80\u5355\u6765\u8bf4<\/p>\n


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\u6b63\u5219\u8868\u8fbe\u5f0f\u5c31\u662f\u5b9a\u4e49\u4e00\u4e9b\u7279\u6b8a\u7684\u7b26\u53f7<\/p>\n


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\u6765\u5339\u914d\u4e0d\u540c\u7684\u5b57\u7b26<\/p>\n


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\u6bd4\u5982<\/p>\n


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d<\/span><\/p>\n


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\u5c31\u53ef\u4ee5\u4ee3\u8868<\/p>\n


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\u4e00\u4e2a\u6570\u5b57\uff0c\u7b49\u4ef7\u4e8e 0-9 \u7684\u4efb\u610f\u4e00\u4e2a<\/p>\n


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\u90a3\u4e48\u4f60\u80af\u5b9a\u60f3\u77e5\u9053<\/p>\n


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\u5176\u5b83\u7684\u7279\u6b8a\u7b26\u53f7\u8868\u793a\u7684\u5565\u610f\u601d\u5427\uff1f<\/p>\n


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\u6069<\/p>\n


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\u5c31\u4e0d\u544a\u8bc9\u4f60<\/p>\n


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\"python\"<\/p>\n


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\u672c\u7bc7\u5b8c<\/p>\n


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\u518d\u89c1<\/p>\n


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\"python\"<\/p>\n


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\u8fd9\u662f\u5404\u79cd\u7b26\u53f7\u7684\u89e3\u91ca
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<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u5b57\u7b26<\/th>\n\u63cf\u8ff0<\/th>\n<\/tr>\n
<\/code><\/th>\n\u5c06\u4e0b\u4e00\u4e2a\u5b57\u7b26\u6807\u8bb0\u4e3a\u4e00\u4e2a\u7279\u6b8a\u5b57\u7b26\uff08File Format Escape<\/span>\uff0c\u6e05\u5355\u89c1\u672c\u8868\uff09\u3001\u6216\u4e00\u4e2a\u539f\u4e49\u5b57\u7b26\uff08Identity Escape<\/span>\uff0c\u6709^$()*+?.[{|\u5171\u8ba112\u4e2a)\u3001\u6216\u4e00\u4e2a\u5411\u540e\u5f15\u7528\uff08backreferences<\/span>\uff09\u3001\u6216\u4e00\u4e2a\u516b\u8fdb\u5236\u8f6c\u4e49\u7b26\u3002\u4f8b\u5982\uff0c\u201cn<\/code>\u201d\u5339\u914d\u5b57\u7b26\u201cn<\/code>\u201d\u3002\u201cn<\/code>\u201d\u5339\u914d\u4e00\u4e2a\u6362\u884c\u7b26\u3002\u5e8f\u5217\u201c\\<\/code>\u201d\u5339\u914d\u201c<\/code>\u201d\u800c\u201c(<\/code>\u201d\u5219\u5339\u914d\u201c(<\/code>\u201d\u3002<\/td>\n<\/tr>\n
^<\/code><\/th>\n\u5339\u914d\u8f93\u5165\u5b57\u7b26\u4e32\u7684\u5f00\u59cb\u4f4d\u7f6e\u3002\u5982\u679c\u8bbe\u7f6e\u4e86RegExp<\/span>\u5bf9\u8c61\u7684Multiline<\/span>\u5c5e\u6027\uff0c^\u4e5f\u5339\u914d\u201cn<\/code>\u201d\u6216\u201cr<\/code>\u201d\u4e4b\u540e\u7684\u4f4d\u7f6e\u3002<\/td>\n<\/tr>\n
$<\/code><\/th>\n\u5339\u914d\u8f93\u5165\u5b57\u7b26\u4e32\u7684\u7ed3\u675f\u4f4d\u7f6e\u3002\u5982\u679c\u8bbe\u7f6e\u4e86RegExp<\/span>\u5bf9\u8c61\u7684Multiline<\/span>\u5c5e\u6027\uff0c$\u4e5f\u5339\u914d\u201cn<\/code>\u201d\u6216\u201cr<\/code>\u201d\u4e4b\u524d\u7684\u4f4d\u7f6e\u3002<\/td>\n<\/tr>\n
*<\/code><\/th>\n\u5339\u914d\u524d\u9762\u7684\u5b50\u8868\u8fbe\u5f0f\u96f6\u6b21\u6216\u591a\u6b21\u3002\u4f8b\u5982\uff0czo*\u80fd\u5339\u914d\u201cz<\/code>\u201d\u3001\u201czo<\/code>\u201d\u4ee5\u53ca\u201czoo<\/code>\u201d\u3002*\u7b49\u4ef7\u4e8e{0,}\u3002<\/td>\n<\/tr>\n
+<\/code><\/th>\n\u5339\u914d\u524d\u9762\u7684\u5b50\u8868\u8fbe\u5f0f\u4e00\u6b21\u6216\u591a\u6b21\u3002\u4f8b\u5982\uff0c\u201czo+<\/code>\u201d\u80fd\u5339\u914d\u201czo<\/code>\u201d\u4ee5\u53ca\u201czoo<\/code>\u201d\uff0c\u4f46\u4e0d\u80fd\u5339\u914d\u201cz<\/code>\u201d\u3002+\u7b49\u4ef7\u4e8e{1,}\u3002<\/td>\n<\/tr>\n
?<\/code><\/th>\n\u5339\u914d\u524d\u9762\u7684\u5b50\u8868\u8fbe\u5f0f\u96f6\u6b21\u6216\u4e00\u6b21\u3002\u4f8b\u5982\uff0c\u201cdo(es)?<\/code>\u201d\u53ef\u4ee5\u5339\u914d\u201cdo<\/code>\u201d\u6216\u201cdoes<\/code>\u201d\u4e2d\u7684\u201cdo<\/code>\u201d\u3002?\u7b49\u4ef7\u4e8e{0,1}\u3002<\/td>\n<\/tr>\n
{n<\/span>}<\/code><\/th>\nn<\/span>\u662f\u4e00\u4e2a\u975e\u8d1f\u6574\u6570\u3002\u5339\u914d\u786e\u5b9a\u7684n<\/span>\u6b21\u3002\u4f8b\u5982\uff0c\u201co{2}<\/code>\u201d\u4e0d\u80fd\u5339\u914d\u201cBob<\/code>\u201d\u4e2d\u7684\u201co<\/code>\u201d\uff0c\u4f46\u662f\u80fd\u5339\u914d\u201cfood<\/code>\u201d\u4e2d\u7684\u4e24\u4e2ao\u3002<\/td>\n<\/tr>\n
{n<\/span>,}<\/code><\/th>\nn<\/span>\u662f\u4e00\u4e2a\u975e\u8d1f\u6574\u6570\u3002\u81f3\u5c11\u5339\u914dn<\/span>\u6b21\u3002\u4f8b\u5982\uff0c\u201co{2,}<\/code>\u201d\u4e0d\u80fd\u5339\u914d\u201cBob<\/code>\u201d\u4e2d\u7684\u201co<\/code>\u201d\uff0c\u4f46\u80fd\u5339\u914d\u201cfoooood<\/code>\u201d\u4e2d\u7684\u6240\u6709o\u3002\u201co{1,}<\/code>\u201d\u7b49\u4ef7\u4e8e\u201co+<\/code>\u201d\u3002\u201co{0,}<\/code>\u201d\u5219\u7b49\u4ef7\u4e8e\u201co*<\/code>\u201d\u3002<\/td>\n<\/tr>\n
{n<\/span>,m<\/span>}<\/code><\/th>\nm<\/span>\u548cn<\/span>\u5747\u4e3a\u975e\u8d1f\u6574\u6570\uff0c\u5176\u4e2dn<\/span><=m<\/span>\u3002\u6700\u5c11\u5339\u914dn<\/span>\u6b21\u4e14\u6700\u591a\u5339\u914dm<\/span>\u6b21\u3002\u4f8b\u5982\uff0c\u201co{1,3}<\/code>\u201d\u5c06\u5339\u914d\u201cfooooood<\/code>\u201d\u4e2d\u7684\u524d\u4e09\u4e2ao\u3002\u201co{0,1}<\/code>\u201d\u7b49\u4ef7\u4e8e\u201co?<\/code>\u201d\u3002\u8bf7\u6ce8\u610f\u5728\u9017\u53f7\u548c\u4e24\u4e2a\u6570\u4e4b\u95f4\u4e0d\u80fd\u6709\u7a7a\u683c\u3002<\/td>\n<\/tr>\n
?<\/code><\/th>\n\u975e\u8d2a\u5fc3\u91cf\u5316\uff08Non-greedy quantifiers<\/span>\uff09\uff1a\u5f53\u8be5\u5b57\u7b26\u7d27\u8ddf\u5728\u4efb\u4f55\u4e00\u4e2a\u5176\u4ed6\u91cd\u590d\u4fee\u9970\u7b26\uff08*,+,?\uff0c{n<\/span>}\uff0c{n<\/span>,}\uff0c{n<\/span>,m<\/span>}\uff09\u540e\u9762\u65f6\uff0c\u5339\u914d\u6a21\u5f0f\u662f\u975e<\/strong>\u8d2a\u5a6a\u7684\u3002\u975e\u8d2a\u5a6a\u6a21\u5f0f\u5c3d\u53ef\u80fd\u5c11\u7684\u5339\u914d\u6240\u641c\u7d22\u7684\u5b57\u7b26\u4e32\uff0c\u800c\u9ed8\u8ba4\u7684\u8d2a\u5a6a\u6a21\u5f0f\u5219\u5c3d\u53ef\u80fd\u591a\u7684\u5339\u914d\u6240\u641c\u7d22\u7684\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u5b57\u7b26\u4e32\u201coooo<\/code>\u201d\uff0c\u201co+?<\/code>\u201d\u5c06\u5339\u914d\u5355\u4e2a\u201co<\/code>\u201d\uff0c\u800c\u201co+<\/code>\u201d\u5c06\u5339\u914d\u6240\u6709\u201co<\/code>\u201d\u3002<\/td>\n<\/tr>\n
.<\/code><\/th>\n\u5339\u914d\u9664\u201cr<\/code>\u201d\u201cn<\/code>\u201d\u4e4b\u5916\u7684\u4efb\u4f55\u5355\u4e2a\u5b57\u7b26\u3002\u8981\u5339\u914d\u5305\u62ec\u201cr<\/code>\u201d\u201cn<\/code>\u201d\u5728\u5185\u7684\u4efb\u4f55\u5b57\u7b26\uff0c\u8bf7\u4f7f\u7528\u50cf\u201c(.|r|n)<\/code>\u201d\u7684\u6a21\u5f0f\u3002<\/td>\n<\/tr>\n
(pattern)<\/code><\/th>\n\u5339\u914dpattern<\/span>\u5e76\u83b7\u53d6\u8fd9\u4e00\u5339\u914d\u7684\u5b50\u5b57\u7b26\u4e32\u3002\u8be5\u5b50\u5b57\u7b26\u4e32\u7528\u4e8e\u5411\u540e\u5f15\u7528\u3002\u6240\u83b7\u53d6\u7684\u5339\u914d\u53ef\u4ee5\u4ece\u4ea7\u751f\u7684Matches<\/span>\u96c6\u5408\u5f97\u5230\uff0c\u5728VBScript<\/span>\u4e2d\u4f7f\u7528SubMatches<\/span>\u96c6\u5408\uff0c\u5728JScript<\/span>\u4e2d\u5219\u4f7f\u7528$0\u2026$9\u5c5e\u6027\u3002\u8981\u5339\u914d\u5706\u62ec\u53f7\u5b57\u7b26\uff0c\u8bf7\u4f7f\u7528\u201c(<\/code>\u201d\u6216\u201c)<\/code>\u201d\u3002\u53ef\u5e26\u6570\u91cf\u540e\u7f00\u3002<\/td>\n<\/tr>\n
(?:pattern)<\/code><\/th>\n\u5339\u914dpattern<\/span>\u4f46\u4e0d\u83b7\u53d6\u5339\u914d\u7684\u5b50\u5b57\u7b26\u4e32\uff08shy groups<\/span>\uff09\uff0c\u4e5f\u5c31\u662f\u8bf4\u8fd9\u662f\u4e00\u4e2a\u975e\u83b7\u53d6\u5339\u914d\uff0c\u4e0d\u5b58\u50a8\u5339\u914d\u7684\u5b50\u5b57\u7b26\u4e32\u7528\u4e8e\u5411\u540e\u5f15\u7528\u3002\u8fd9\u5728\u4f7f\u7528\u6216\u5b57\u7b26\u201c(|)<\/code>\u201d\u6765\u7ec4\u5408\u4e00\u4e2a\u6a21\u5f0f\u7684\u5404\u4e2a\u90e8\u5206\u662f\u5f88\u6709\u7528\u3002\u4f8b\u5982\u201cindustr(?:y|ies)<\/code>\u201d\u5c31\u662f\u4e00\u4e2a\u6bd4\u201cindustry|industries<\/code>\u201d\u66f4\u7b80\u7565\u7684\u8868\u8fbe\u5f0f\u3002<\/td>\n<\/tr>\n
(?=pattern)<\/code><\/th>\n\u6b63\u5411\u80af\u5b9a\u9884\u67e5\uff08look ahead positive assert<\/span>\uff09\uff0c\u5728\u4efb\u4f55\u5339\u914dpattern<\/span>\u7684\u5b57\u7b26\u4e32\u5f00\u59cb\u5904\u5339\u914d\u67e5\u627e\u5b57\u7b26\u4e32\u3002\u8fd9\u662f\u4e00\u4e2a\u975e\u83b7\u53d6\u5339\u914d\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u8be5\u5339\u914d\u4e0d\u9700\u8981\u83b7\u53d6\u4f9b\u4ee5\u540e\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u201cWindows(?=95|98|NT|2000)<\/code>\u201d\u80fd\u5339\u914d\u201cWindows2000<\/code>\u201d\u4e2d\u7684\u201cWindows<\/code>\u201d\uff0c\u4f46\u4e0d\u80fd\u5339\u914d\u201cWindows3.1<\/code>\u201d\u4e2d\u7684\u201cWindows<\/code>\u201d\u3002\u9884\u67e5\u4e0d\u6d88\u8017\u5b57\u7b26\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u4e00\u4e2a\u5339\u914d\u53d1\u751f\u540e\uff0c\u5728\u6700\u540e\u4e00\u6b21\u5339\u914d\u4e4b\u540e\u7acb\u5373\u5f00\u59cb\u4e0b\u4e00\u6b21\u5339\u914d\u7684\u641c\u7d22\uff0c\u800c\u4e0d\u662f\u4ece\u5305\u542b\u9884\u67e5\u7684\u5b57\u7b26\u4e4b\u540e\u5f00\u59cb\u3002<\/td>\n<\/tr>\n
(?!pattern)<\/code><\/th>\n\u6b63\u5411\u5426\u5b9a\u9884\u67e5\uff08negative assert<\/span>\uff09\uff0c\u5728\u4efb\u4f55\u4e0d\u5339\u914dpattern<\/span>\u7684\u5b57\u7b26\u4e32\u5f00\u59cb\u5904\u5339\u914d\u67e5\u627e\u5b57\u7b26\u4e32\u3002\u8fd9\u662f\u4e00\u4e2a\u975e\u83b7\u53d6\u5339\u914d\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u8be5\u5339\u914d\u4e0d\u9700\u8981\u83b7\u53d6\u4f9b\u4ee5\u540e\u4f7f\u7528\u3002\u4f8b\u5982\u201cWindows(?!95|98|NT|2000)<\/code>\u201d\u80fd\u5339\u914d\u201cWindows3.1<\/code>\u201d\u4e2d\u7684\u201cWindows<\/code>\u201d\uff0c\u4f46\u4e0d\u80fd\u5339\u914d\u201cWindows2000<\/code>\u201d\u4e2d\u7684\u201cWindows<\/code>\u201d\u3002\u9884\u67e5\u4e0d\u6d88\u8017\u5b57\u7b26\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u4e00\u4e2a\u5339\u914d\u53d1\u751f\u540e\uff0c\u5728\u6700\u540e\u4e00\u6b21\u5339\u914d\u4e4b\u540e\u7acb\u5373\u5f00\u59cb\u4e0b\u4e00\u6b21\u5339\u914d\u7684\u641c\u7d22\uff0c\u800c\u4e0d\u662f\u4ece\u5305\u542b\u9884\u67e5\u7684\u5b57\u7b26\u4e4b\u540e\u5f00\u59cb<\/td>\n<\/tr>\n
(?<=pattern)<\/code><\/th>\n\u53cd\u5411\uff08look behind<\/span>\uff09\u80af\u5b9a\u9884\u67e5\uff0c\u4e0e\u6b63\u5411\u80af\u5b9a\u9884\u67e5\u7c7b\u4f3c\uff0c\u53ea\u662f\u65b9\u5411\u76f8\u53cd\u3002\u4f8b\u5982\uff0c\u201c(?<=95|98|NT|2000)Windows<\/code>\u201d\u80fd\u5339\u914d\u201c2000Windows<\/code>\u201d\u4e2d\u7684\u201cWindows<\/code>\u201d\uff0c\u4f46\u4e0d\u80fd\u5339\u914d\u201c3.1Windows<\/code>\u201d\u4e2d\u7684\u201cWindows<\/code>\u201d\u3002<\/td>\n<\/tr>\n
(?<!pattern)<\/code><\/th>\n\u53cd\u5411\u5426\u5b9a\u9884\u67e5\uff0c\u4e0e\u6b63\u5411\u5426\u5b9a\u9884\u67e5\u7c7b\u4f3c\uff0c\u53ea\u662f\u65b9\u5411\u76f8\u53cd\u3002\u4f8b\u5982\u201c(?<!95|98|NT|2000)Windows<\/code>\u201d\u80fd\u5339\u914d\u201c3.1Windows<\/code>\u201d\u4e2d\u7684\u201cWindows<\/code>\u201d\uff0c\u4f46\u4e0d\u80fd\u5339\u914d\u201c2000Windows<\/code>\u201d\u4e2d\u7684\u201cWindows<\/code>\u201d\u3002<\/td>\n<\/tr>\n
x|y<\/code><\/th>\n\u6ca1\u6709\u5305\u56f4\u5728()\u91cc\uff0c\u5176\u8303\u56f4\u662f\u6574\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u3002\u4f8b\u5982\uff0c\u201cz|food<\/code>\u201d\u80fd\u5339\u914d\u201cz<\/code>\u201d\u6216\u201cfood<\/code>\u201d\u3002\u201c(?:z|f)ood<\/code>\u201d\u5219\u5339\u914d\u201czood<\/code>\u201d\u6216\u201cfood<\/code>\u201d\u3002<\/td>\n<\/tr>\n
[xyz]<\/code><\/th>\n\u5b57\u7b26\u96c6\u5408\uff08character class<\/span>\uff09\u3002\u5339\u914d\u6240\u5305\u542b\u7684\u4efb\u610f\u4e00\u4e2a\u5b57\u7b26\u3002\u4f8b\u5982\uff0c\u201c[abc]<\/code>\u201d\u53ef\u4ee5\u5339\u914d\u201cplain<\/code>\u201d\u4e2d\u7684\u201ca<\/code>\u201d\u3002\u7279\u6b8a\u5b57\u7b26\u4ec5\u6709\u53cd\u659c\u7ebf\u4fdd\u6301\u7279\u6b8a\u542b\u4e49\uff0c\u7528\u4e8e\u8f6c\u4e49\u5b57\u7b26\u3002\u5176\u5b83\u7279\u6b8a\u5b57\u7b26\u5982\u661f\u53f7\u3001\u52a0\u53f7\u3001\u5404\u79cd\u62ec\u53f7\u7b49\u5747\u4f5c\u4e3a\u666e\u901a\u5b57\u7b26\u3002\u8131\u5b57\u7b26^\u5982\u679c\u51fa\u73b0\u5728\u9996\u4f4d\u5219\u8868\u793a\u8d1f\u503c\u5b57\u7b26\u96c6\u5408\uff1b\u5982\u679c\u51fa\u73b0\u5728\u5b57\u7b26\u4e32\u4e2d\u95f4\u5c31\u4ec5\u4f5c\u4e3a\u666e\u901a\u5b57\u7b26\u3002\u8fde\u5b57\u7b26 – \u5982\u679c\u51fa\u73b0\u5728\u5b57\u7b26\u4e32\u4e2d\u95f4\u8868\u793a\u5b57\u7b26\u8303\u56f4\u63cf\u8ff0\uff1b\u5982\u679c\u5982\u679c\u51fa\u73b0\u5728\u9996\u4f4d\uff08\u6216\u672b\u5c3e\uff09\u5219\u4ec5\u4f5c\u4e3a\u666e\u901a\u5b57\u7b26\u3002\u53f3\u65b9\u62ec\u53f7\u5e94\u8f6c\u4e49\u51fa\u73b0\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u9996\u4f4d\u5b57\u7b26\u51fa\u73b0\u3002<\/td>\n<\/tr>\n
[^xyz]<\/code><\/th>\n\u6392\u9664\u578b\u5b57\u7b26\u96c6\u5408\uff08negated character classes<\/span>\uff09\u3002\u5339\u914d\u672a\u5217\u51fa\u7684\u4efb\u610f\u5b57\u7b26\u3002\u4f8b\u5982\uff0c\u201c[^abc]<\/code>\u201d\u53ef\u4ee5\u5339\u914d\u201cplain<\/code>\u201d\u4e2d\u7684\u201cplain<\/code>\u201d\u3002<\/td>\n<\/tr>\n
[a-z]<\/code><\/th>\n\u5b57\u7b26\u8303\u56f4\u3002\u5339\u914d\u6307\u5b9a\u8303\u56f4\u5185\u7684\u4efb\u610f\u5b57\u7b26\u3002\u4f8b\u5982\uff0c\u201c[a-z]<\/code>\u201d\u53ef\u4ee5\u5339\u914d\u201ca<\/code>\u201d\u5230\u201cz<\/code>\u201d\u8303\u56f4\u5185\u7684\u4efb\u610f\u5c0f\u5199\u5b57\u6bcd\u5b57\u7b26\u3002<\/td>\n<\/tr>\n
[^a-z]<\/code><\/th>\n\u6392\u9664\u578b\u7684\u5b57\u7b26\u8303\u56f4\u3002\u5339\u914d\u4efb\u4f55\u4e0d\u5728\u6307\u5b9a\u8303\u56f4\u5185\u7684\u4efb\u610f\u5b57\u7b26\u3002\u4f8b\u5982\uff0c\u201c[^a-z]<\/code>\u201d\u53ef\u4ee5\u5339\u914d\u4efb\u4f55\u4e0d\u5728\u201ca<\/code>\u201d\u5230\u201cz<\/code>\u201d\u8303\u56f4\u5185\u7684\u4efb\u610f\u5b57\u7b26\u3002<\/td>\n<\/tr>\n
[:name:]<\/code><\/th>\n\u589e\u52a0\u547d\u540d\u5b57\u7b26\u7c7b\uff08named character class<\/span>\uff09[\u6ce8 1]<\/sup>\u4e2d\u7684\u5b57\u7b26\u5230\u8868\u8fbe\u5f0f\u3002\u53ea\u80fd\u7528\u4e8e\u65b9\u62ec\u53f7\u8868\u8fbe\u5f0f<\/strong>\u3002<\/td>\n<\/tr>\n
[=elt=]<\/code><\/th>\n\u589e\u52a0\u5f53\u524dlocale<\/span>\u4e0b\u6392\u5e8f\uff08collate<\/span>\uff09\u7b49\u4ef7\u4e8e\u5b57\u7b26\u201celt<\/span>\u201d\u7684\u5143\u7d20\u3002\u4f8b\u5982\uff0c[=a=]\u53ef\u80fd\u4f1a\u589e\u52a0\u00e4\u3001\u00e1\u3001\u00e0\u3001\u0103\u3001\u1eaf\u3001\u1eb1\u3001\u1eb5\u3001\u1eb3\u3001\u00e2\u3001\u1ea5\u3001\u1ea7\u3001\u1eab\u3001\u1ea9\u3001\u01ce\u3001\u00e5\u3001\u01fb\u3001\u00e4\u3001\u01df\u3001\u00e3\u3001\u0227\u3001\u01e1\u3001\u0105\u3001\u0101\u3001\u1ea3\u3001\u0201\u3001\u0203\u3001\u1ea1\u3001\u1eb7\u3001\u1ead\u3001\u1e01\u3001\u2c65\u3001\u1d8f\u3001\u0250\u3001\u0251 \u3002\u53ea\u80fd\u7528\u4e8e\u65b9\u62ec\u53f7\u8868\u8fbe\u5f0f\u3002<\/td>\n<\/tr>\n
[.elt.]<\/code><\/th>\n\u589e\u52a0\u6392\u5e8f\u5143\u7d20\uff08collation element<\/span>\uff09elt<\/span>\u5230\u8868\u8fbe\u5f0f\u4e2d\u3002\u8fd9\u662f\u56e0\u4e3a\u67d0\u4e9b\u6392\u5e8f\u5143\u7d20\u7531\u591a\u4e2a\u5b57\u7b26\u7ec4\u6210\u3002\u4f8b\u5982\uff0c29\u4e2a\u5b57\u6bcd\u8868\u7684\u897f\u73ed\u7259\u8bed\uff0c “CH”\u4f5c\u4e3a\u5355\u4e2a\u5b57\u6bcd\u6392\u5728\u5b57\u6bcdC\u4e4b\u540e\uff0c\u56e0\u6b64\u4f1a\u4ea7\u751f\u5982\u6b64\u6392\u5e8f\u201ccinco, credo, chispa\u201d\u3002\u53ea\u80fd\u7528\u4e8e\u65b9\u62ec\u53f7\u8868\u8fbe\u5f0f\u3002<\/td>\n<\/tr>\n
b<\/code><\/th>\n\u5339\u914d\u4e00\u4e2a\u5355\u8bcd\u8fb9\u754c\uff0c\u4e5f\u5c31\u662f\u6307\u5355\u8bcd\u548c\u7a7a\u683c\u95f4\u7684\u4f4d\u7f6e\u3002\u4f8b\u5982\uff0c\u201cerb<\/code>\u201d\u53ef\u4ee5\u5339\u914d\u201cnever<\/code>\u201d\u4e2d\u7684\u201cer<\/code>\u201d\uff0c\u4f46\u4e0d\u80fd\u5339\u914d\u201cverb<\/code>\u201d\u4e2d\u7684\u201cer<\/code>\u201d\u3002<\/td>\n<\/tr>\n
B<\/code><\/th>\n\u5339\u914d\u975e\u5355\u8bcd\u8fb9\u754c\u3002\u201cerB<\/code>\u201d\u80fd\u5339\u914d\u201cverb<\/code>\u201d\u4e2d\u7684\u201cer<\/code>\u201d\uff0c\u4f46\u4e0d\u80fd\u5339\u914d\u201cnever<\/code>\u201d\u4e2d\u7684\u201cer<\/code>\u201d\u3002<\/td>\n<\/tr>\n
cx<\/code><\/th>\n\u5339\u914d\u7531x\u6307\u660e\u7684\u63a7\u5236\u5b57\u7b26\u3002x\u7684\u503c\u5fc5\u987b\u4e3aA-Z<\/code>\u6216a-z<\/code>\u4e4b\u4e00\u3002\u5426\u5219\uff0c\u5c06c\u89c6\u4e3a\u4e00\u4e2a\u539f\u4e49\u7684\u201cc<\/code>\u201d\u5b57\u7b26\u3002\u63a7\u5236\u5b57\u7b26\u7684\u503c\u7b49\u4e8ex\u7684\u503c\u6700\u4f4e5\u6bd4\u7279\uff08\u5373\u5bf93210\u8fdb\u5236<\/sub>\u7684\u4f59\u6570\uff09\u3002\u4f8b\u5982\uff0ccM\u5339\u914d\u4e00\u4e2aControl-M<\/span>\u6216\u56de\u8f66\u7b26\u3002ca\u7b49\u6548\u4e8eu0001, cb\u7b49\u6548\u4e8eu0002, \u7b49\u7b49…<\/td>\n<\/tr>\n
d<\/code><\/th>\n\u5339\u914d\u4e00\u4e2a\u6570\u5b57\u5b57\u7b26\u3002\u7b49\u4ef7\u4e8e[0-9]\u3002\u6ce8\u610fUnicode<\/span>\u6b63\u5219\u8868\u8fbe\u5f0f\u4f1a\u5339\u914d\u5168\u89d2\u6570\u5b57\u5b57\u7b26\u3002<\/td>\n<\/tr>\n
D<\/code><\/th>\n\u5339\u914d\u4e00\u4e2a\u975e\u6570\u5b57\u5b57\u7b26\u3002\u7b49\u4ef7\u4e8e[^0-9]\u3002<\/td>\n<\/tr>\n
f<\/code><\/th>\n\u5339\u914d\u4e00\u4e2a\u6362\u9875\u7b26\u3002\u7b49\u4ef7\u4e8ex0c\u548ccL\u3002<\/td>\n<\/tr>\n
n<\/code><\/th>\n\u5339\u914d\u4e00\u4e2a\u6362\u884c\u7b26\u3002\u7b49\u4ef7\u4e8ex0a\u548ccJ\u3002<\/td>\n<\/tr>\n
r<\/code><\/th>\n\u5339\u914d\u4e00\u4e2a\u56de\u8f66\u7b26\u3002\u7b49\u4ef7\u4e8ex0d\u548ccM\u3002<\/td>\n<\/tr>\n
s<\/code><\/th>\n\u5339\u914d\u4efb\u4f55\u7a7a\u767d\u5b57\u7b26\uff0c\u5305\u62ec\u7a7a\u683c\u3001\u5236\u8868\u7b26\u3001\u6362\u9875\u7b26\u7b49\u7b49\u3002\u7b49\u4ef7\u4e8e[ fnrtv]\u3002\u6ce8\u610fUnicode<\/span>\u6b63\u5219\u8868\u8fbe\u5f0f\u4f1a\u5339\u914d\u5168\u89d2\u7a7a\u683c\u7b26\u3002<\/td>\n<\/tr>\n
S<\/code><\/th>\n\u5339\u914d\u4efb\u4f55\u975e\u7a7a\u767d\u5b57\u7b26\u3002\u7b49\u4ef7\u4e8e[^ fnrtv]\u3002<\/td>\n<\/tr>\n
t<\/code><\/th>\n\u5339\u914d\u4e00\u4e2a\u5236\u8868\u7b26\u3002\u7b49\u4ef7\u4e8ex09\u548ccI\u3002<\/td>\n<\/tr>\n
v<\/code><\/th>\n\u5339\u914d\u4e00\u4e2a\u5782\u76f4\u5236\u8868\u7b26\u3002\u7b49\u4ef7\u4e8ex0b\u548ccK\u3002<\/td>\n<\/tr>\n
w<\/code><\/th>\n\u5339\u914d\u5305\u62ec\u4e0b\u5212\u7ebf\u7684\u4efb\u4f55\u5355\u8bcd\u5b57\u7b26\u3002\u7b49\u4ef7\u4e8e\u201c[A-Za-z0-9_]<\/code>\u201d\u3002\u6ce8\u610fUnicode<\/span>\u6b63\u5219\u8868\u8fbe\u5f0f\u4f1a\u5339\u914d\u4e2d\u6587\u5b57\u7b26\u3002<\/td>\n<\/tr>\n
W<\/code><\/th>\n\u5339\u914d\u4efb\u4f55\u975e\u5355\u8bcd\u5b57\u7b26\u3002\u7b49\u4ef7\u4e8e\u201c[^A-Za-z0-9_]<\/code>\u201d\u3002<\/td>\n<\/tr>\n
xnn<\/span><\/code><\/th>\n\u5341\u516d\u8fdb\u5236\u8f6c\u4e49\u5b57\u7b26\u5e8f\u5217\u3002\u5339\u914d\u4e24\u4e2a\u5341\u516d\u8fdb\u5236\u6570\u5b57nn<\/span>\u8868\u793a\u7684\u5b57\u7b26\u3002\u4f8b\u5982\uff0c\u201cx41<\/code>\u201d\u5339\u914d\u201cA<\/code>\u201d\u3002\u201cx041<\/code>\u201d\u5219\u7b49\u4ef7\u4e8e\u201cx04&1<\/code>\u201d\u3002\u6b63\u5219\u8868\u8fbe\u5f0f\u4e2d\u53ef\u4ee5\u4f7f\u7528ASCII<\/span>\u7f16\u7801\u3002.<\/td>\n<\/tr>\n
num<\/span><\/code><\/th>\n\u5411\u540e\u5f15\u7528\uff08back-reference<\/span>\uff09\u4e00\u4e2a\u5b50\u5b57\u7b26\u4e32\uff08substring<\/span>\uff09\uff0c\u8be5\u5b50\u5b57\u7b26\u4e32\u4e0e\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u7b2cnum<\/span>\u4e2a\u7528\u62ec\u53f7\u56f4\u8d77\u6765\u7684\u6355\u6349\u7fa4\uff08capture group<\/span>\uff09\u5b50\u8868\u8fbe\u5f0f\uff08subexpression<\/span>\uff09\u5339\u914d\u3002\u5176\u4e2dnum<\/span>\u662f\u4ece1\u5f00\u59cb\u7684\u5341\u8fdb\u5236\u6b63\u6574\u6570\uff0c\u5176\u4e0a\u9650\u53ef\u80fd\u662f9[\u6ce8 2]<\/sup>\u300131[\u6ce8 3]<\/sup>\u300199\u751a\u81f3\u65e0\u9650[\u6ce8 4]<\/sup>\u3002\u4f8b\u5982\uff1a\u201c(.)1<\/code>\u201d\u5339\u914d\u4e24\u4e2a\u8fde\u7eed\u7684\u76f8\u540c\u5b57\u7b26\u3002<\/td>\n<\/tr>\n
n<\/span><\/code><\/th>\n\u6807\u8bc6\u4e00\u4e2a\u516b\u8fdb\u5236\u8f6c\u4e49\u503c\u6216\u4e00\u4e2a\u5411\u540e\u5f15\u7528\u3002\u5982\u679cn<\/span>\u4e4b\u524d\u81f3\u5c11n<\/span>\u4e2a\u83b7\u53d6\u7684\u5b50\u8868\u8fbe\u5f0f\uff0c\u5219n<\/span>\u4e3a\u5411\u540e\u5f15\u7528\u3002\u5426\u5219\uff0c\u5982\u679cn<\/span>\u4e3a\u516b\u8fdb\u5236\u6570\u5b57\uff080-7\uff09\uff0c\u5219n<\/span>\u4e3a\u4e00\u4e2a\u516b\u8fdb\u5236\u8f6c\u4e49\u503c\u3002<\/td>\n<\/tr>\n
nm<\/span><\/code><\/th>\n3\u4f4d\u516b\u8fdb\u5236\u6570\u5b57\uff0c\u6807\u8bc6\u4e00\u4e2a\u516b\u8fdb\u5236\u8f6c\u4e49\u503c\u6216\u4e00\u4e2a\u5411\u540e\u5f15\u7528\u3002\u5982\u679cnm<\/span>\u4e4b\u524d\u81f3\u5c11\u6709nm<\/span>\u4e2a\u83b7\u5f97\u5b50\u8868\u8fbe\u5f0f\uff0c\u5219nm<\/span>\u4e3a\u5411\u540e\u5f15\u7528\u3002\u5982\u679cnm<\/span>\u4e4b\u524d\u81f3\u5c11\u6709n<\/span>\u4e2a\u83b7\u53d6\uff0c\u5219n<\/span>\u4e3a\u4e00\u4e2a\u540e\u8ddf\u6587\u5b57m<\/span>\u7684\u5411\u540e\u5f15\u7528\u3002\u5982\u679c\u524d\u9762\u7684\u6761\u4ef6\u90fd\u4e0d\u6ee1\u8db3\uff0c\u82e5n<\/span>\u548cm<\/span>\u5747\u4e3a\u516b\u8fdb\u5236\u6570\u5b57\uff080-7\uff09\uff0c\u5219nm<\/span>\u5c06\u5339\u914d\u516b\u8fdb\u5236\u8f6c\u4e49\u503cnm<\/span>\u3002<\/td>\n<\/tr>\n
nml<\/span><\/code><\/th>\n\u5982\u679cn<\/span>\u4e3a\u516b\u8fdb\u5236\u6570\u5b57\uff080-3\uff09\uff0c\u4e14m\u548cl<\/span>\u5747\u4e3a\u516b\u8fdb\u5236\u6570\u5b57\uff080-7\uff09\uff0c\u5219\u5339\u914d\u516b\u8fdb\u5236\u8f6c\u4e49\u503cnm<\/span>l\u3002<\/td>\n<\/tr>\n
un<\/span><\/code><\/th>\nUnicode\u8f6c\u4e49\u5b57\u7b26\u5e8f\u5217\u3002\u5176\u4e2dn<\/span>\u662f\u4e00\u4e2a\u7528\u56db\u4e2a\u5341\u516d\u8fdb\u5236\u6570\u5b57\u8868\u793a\u7684Unicode<\/span>\u5b57\u7b26\u3002\u4f8b\u5982\uff0cu00A9\u5339\u914d\u7248\u6743\u7b26\u53f7\uff08\u00a9\uff09\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\uff08\u6765\u81ea\u7ef4\u57fa\u767e\u79d1\uff09<\/p>\n


<\/p>\n


<\/p>\n


<\/p>\n

\u4f60\u80fd\u770b\u5230\u8fd9\u91cc<\/p>\n


<\/p>\n

\u4e5f\u662f<\/p>\n


<\/p>\n


<\/p>\n

\"python\"<\/p>\n


<\/p>\n

\u4e0d\u77e5\u9053\u4f60\u770b\u61f5\u903c\u4e86\u6ca1\uff1f<\/p>\n


<\/p>\n

\u53cd\u6b63\u6211\u662f\u4e0d\u60f3\u770b\u4e86<\/p>\n


<\/p>\n

\u63a5\u4e0b\u6765<\/p>\n


<\/p>\n

\u624d\u662f\u5e72\u8d27<\/p>\n


<\/p>\n

\"python\"<\/p>\n


<\/p>\n

\u5c0f\u5e05b\u5c31\u7ed9\u4f60\u7cbe\u7b80\u4e00\u4e0b<\/p>\n


<\/p>\n

\u901a\u4fd7\u7684\u628a\u6700\u5e38\u7528\u7684\u5339\u914d\u544a\u8bc9\u4f60<\/p>\n


<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u5b57\u7b26<\/th>\n\u63cf\u8ff0<\/th>\n<\/tr>\n
d<\/span><\/th>\n\u4ee3\u8868\u4efb\u610f\u6570\u5b57\uff0c\u5c31\u662f\u963f\u62c9\u4f2f\u6570\u5b57 0-9 \u8fd9\u4e9b\u73a9\u610f\u3002<\/td>\n<\/tr>\n
D<\/code><\/th>\n\u5927\u5199\u7684\u5c31\u662f\u548c\u5c0f\u5199\u7684\u5531\u53cd\u8c03\uff0cd \u4f60\u4ee3\u8868\u7684\u662f\u4efb\u610f\u6570\u5b57\u662f\u5427\uff1f\u90a3\u4e48\u6211 D \u5c31\u4ee3\u8868\u4e0d\u662f\u6570\u5b57\u7684\u3002<\/td>\n<\/tr>\n
w<\/code><\/th>\n\u4ee3\u8868\u5b57\u6bcd\uff0c\u6570\u5b57\uff0c\u4e0b\u5212\u7ebf\u3002\u4e5f\u5c31\u662f a-z\u3001A-Z\u30010-9\u3001_\u3002<\/td>\n<\/tr>\n
W<\/code><\/th>\n\u8ddf w \u5531\u53cd\u8c03\uff0c\u4ee3\u8868\u4e0d\u662f\u5b57\u6bcd\uff0c\u4e0d\u662f\u6570\u5b57\uff0c\u4e0d\u662f\u4e0b\u5212\u7ebf\u7684\u3002<\/td>\n<\/tr>\n
n<\/span><\/span><\/th>\n\u4ee3\u8868\u4e00\u4e2a\u6362\u884c\u3002<\/td>\n<\/tr>\n
r<\/span><\/code><\/th>\n\u4ee3\u8868\u4e00\u4e2a\u56de\u8f66\u3002
<\/td>\n<\/tr>\n
f<\/span><\/code><\/th>\n\u4ee3\u8868\u6362\u9875\u3002<\/td>\n<\/tr>\n
t<\/code><\/th>\n\u4ee3\u8868\u4e00\u4e2a Tab \u3002
<\/td>\n<\/tr>\n
s<\/code><\/th>\n\u4ee3\u8868\u6240\u6709\u7684\u7a7a\u767d\u5b57\u7b26\uff0c\u4e5f\u5c31\u662f\u4e0a\u9762\u8fd9\u4e2a\uff1an\u3001r\u3001t\u3001f\u3002<\/td>\n<\/tr>\n
S<\/code><\/th>\n\n

\u8ddf s \u5531\u53cd\u8c03\uff0c\u4ee3\u8868\u6240\u6709\u4e0d\u662f\u7a7a\u767d\u7684\u5b57\u7b26\u3002<\/p>\n<\/td>\n<\/tr>\n

A<\/code><\/th>\n\u4ee3\u8868\u5b57\u7b26\u4e32\u7684\u5f00\u59cb\u3002<\/td>\n<\/tr>\n
Z<\/code><\/th>\n\u4ee3\u8868\u5b57\u7b26\u4e32\u7684\u7ed3\u675f\u3002<\/td>\n<\/tr>\n
^<\/th>\n\u5339\u914d\u5b57\u7b26\u4e32\u5f00\u59cb\u7684\u4f4d\u7f6e\u3002<\/td>\n<\/tr>\n
$<\/span><\/span><\/th>\n\u5339\u914d\u5b57\u7b26\u521b\u7ed3\u675f\u7684\u4f4d\u7f6e\u3002<\/td>\n<\/tr>\n
.<\/span><\/span><\/th>\n\u4ee3\u8868\u6240\u6709\u7684\u5355\u4e2a\u5b57\u7b26\uff0c\u9664\u4e86 n r<\/td>\n<\/tr>\n
[...]<\/code><\/th>\n\u4ee3\u8868\u5728 [] \u8303\u56f4\u5185\u7684\u5b57\u7b26\uff0c\u6bd4\u5982 [a-z] \u5c31\u4ee3\u8868 a\u5230z\u7684\u5b57\u6bcd<\/td>\n<\/tr>\n
[^...]<\/span><\/code><\/th>\n\u8ddf […] \u5531\u53cd\u8c03\uff0c\u4ee3\u8868\u4e0d\u5728 [] \u8303\u56f4\u5185\u7684\u5b57\u7b26<\/td>\n<\/tr>\n
{n}
<\/th>\n		\u5339\u914d\u5728 {n} \u524d\u9762\u7684\u4e1c\u897f\uff0c\u6bd4\u5982: o{2} \u4e0d\u80fd\u5339\u914d Bob \u4e2d\u7684 o \uff0c\u4f46\u662f\u80fd\u5339\u914d food \u4e2d\u7684\u4e24\u4e2ao\u3002<\/td>\n<\/tr>\n
{n,m}<\/code><\/th>\n\u5339\u914d\u5728 {n,m} \u524d\u9762\u7684\u4e1c\u897f\uff0c\u6bd4\u5982\uff1ao{1,3} \u5c06\u5339\u914d\u201cfooooood\u201d\u4e2d\u7684\u524d\u4e09\u4e2ao\u3002<\/td>\n<\/tr>\n
{n\uff0c}<\/code><\/th>\n\u5339\u914d\u5728 {n,} \u524d\u9762\u7684\u4e1c\u897f\uff0c\u6bd4\u5982\uff1ao{2,} \u4e0d\u80fd\u5339\u914d\u201cBob\u201d\u4e2d\u7684\u201co\u201d\uff0c\u4f46\u80fd\u5339\u914d\u201cfoooood\u201d\u4e2d\u7684\u6240\u6709o\u3002<\/td>\n<\/tr>\n
*<\/code><\/th>\n\u548c {0,} \u4e00\u4e2a\u6837\uff0c\u5339\u914d * \u524d\u9762\u7684 0 \u6b21\u6216\u591a\u6b21\u3002 \u6bd4\u5982 zo* \u80fd\u5339\u914d\u201cz\u201d\u3001\u201czo\u201d\u4ee5\u53ca\u201czoo\u201d\u3002<\/td>\n<\/tr>\n
+<\/code><\/th>\n\u548c{1\uff0c} \u4e00\u4e2a\u6837\uff0c\u5339\u914d + \u524d\u9762 1 \u6b21\u6216\u591a\u6b21\u3002 \u6bd4\u5982 zo+\u201d\u80fd\u5339\u914d\u201czo\u201d\u4ee5\u53ca\u201czoo\u201d\uff0c\u4f46\u4e0d\u80fd\u5339\u914d\u201cz\u201d\u3002<\/td>\n<\/tr>\n
\uff1f<\/code><\/th>\n\u548c{0,1} \u4e00\u4e2a\u6837\uff0c\u5339\u914d \uff1f\u524d\u9762 0 \u6b21\u6216 1 \u6b21\u3002
<\/td>\n<\/tr>\n
a|b<\/span><\/span><\/th>\n\u5339\u914d a \u6216\u8005 b\u3002<\/td>\n<\/tr>\n
\uff08\uff09<\/code><\/th>\n\u5339\u914d\u62ec\u53f7\u91cc\u9762\u7684\u5185\u5bb9\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n


<\/p>\n


<\/p>\n

ok<\/p>\n


<\/p>\n

\u77e5\u9053\u4e86\u8fd9\u4e9b\u4e4b\u540e<\/p>\n


<\/p>\n

\u6211\u4eec\u600e\u4e48\u7528 python \u6765\u8fdb\u884c\u5224\u65ad\u5462\uff1f<\/p>\n


<\/p>\n

\u90a3\u5c31\u8981\u4f7f\u7528\u5230 python \u7684\u5e93\u4e86<\/p>\n


<\/p>\n

\u5b83\u5c31\u662f<\/p>\n


<\/p>\n

re<\/strong><\/span><\/p>\n


<\/strong><\/span><\/p>\n

\u63a5\u4e0b\u6765\u6211\u4eec\u5c31\u6765\u4f7f\u7528 re \u6a21\u5757<\/p>\n


<\/p>\n

\u5bf9\u5176\u5e38\u7528\u7684\u65b9\u6cd5<\/p>\n


<\/p>\n

\u6765\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f<\/p>\n


<\/p>\n

re.match<\/strong><\/p>\n


<\/p>\n

\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5<\/p>\n


<\/p>\n

\u4e3b\u8981\u4f20\u5165\u4e24\u4e2a\u53c2\u6570<\/p>\n


<\/p>\n

\u7b2c\u4e00\u4e2a\u5c31\u662f\u6211\u4eec\u7684\u5339\u914d\u89c4\u5219<\/p>\n


<\/p>\n

\u7b2c\u4e8c\u4e2a\u5c31\u662f\u9700\u8981\u88ab\u8fc7\u6ee4\u7684\u5185\u5bb9<\/p>\n


<\/p>\n

\u4f8b\u5982<\/p>\n


<\/p>\n

\u6211\u4eec\u60f3\u8981\u4ece\u8fd9<\/p>\n


<\/p>\n

Xiaoshuaib has 100 bananas<\/span><\/pre>\n

<\/p>\n
\u62ff\u5230\u4e00\u4e2a\u6570\u5b57<\/p>\n

<\/p>\n
\u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u8fd9\u6837<\/p>\n

<\/p>\n
import <\/span>re

content = 'Xiaoshuaib has 100 bananas'
<\/span>res = re.match('^Xi.*(d+)s.*s$'<\/span>,<\/span>content)
print<\/span>(res.group(1<\/span>))<\/pre>\n

<\/strong><\/span><\/p>\n
\u901a\u8fc7\u6211\u4eec\u521a\u521a\u8bf4\u7684\u5339\u914d\u7b26\u53f7
<\/p>\n

<\/p>\n
\u53ef\u4ee5\u5b9a\u4e49\u51fa\u76f8\u5e94\u7684\u5339\u914d\u89c4\u5219<\/p>\n

<\/p>\n
\u5728\u8fd9\u91cc\u6211\u4eec\u5c06\u6211\u4eec\u9700\u8981\u7684\u76ee\u6807\u5185\u5bb9\u7528 () \u62ec\u8d77\u6765<\/p>\n

<\/p>\n
\u6b64\u523b\u6211\u4eec\u83b7\u5f97\u7ed3\u679c\u662f<\/p>\n

<\/p>\n
0<\/p>\n

<\/p>\n
\u90a3\u4e48\u5982\u679c\u6211\u4eec\u60f3\u8981 100 \u8fd9\u4e2a\u6570\u5b57\u5462\uff1f<\/p>\n

<\/p>\n
\u53ef\u4ee5\u8fd9\u6837<\/p>\n

<\/p>\n
import <\/span>re

content = 'Xiaoshuaib has 100 bananas'
<\/span>res = re.match('^Xi.*?(d+)s.*s$'<\/span>,<\/span>content)
print<\/span>(res.group(1<\/span>))<\/pre>\n

<\/p>\n
\u770b\u51fa\u533a\u522b\u4e86\u4e48<\/p>\n

<\/p>\n
\u7b2c\u4e8c\u6bb5\u4ee3\u7801\u6211\u4eec\u591a\u4e86\u4e00\u4e2a \uff1f\u7b26\u53f7<\/p>\n

<\/p>\n
\u5728\u8fd9\u91cc\u5462<\/p>\n

<\/p>\n
\u6d89\u53ca\u5230\u4e24\u4e2a\u6982\u5ff5<\/p>\n

<\/p>\n
\u4e00\u4e2a\u662f<\/p>\n

<\/p>\n
\u8d2a\u5a6a\u5339\u914d<\/span><\/p>\n

<\/p>\n
\u53e6\u4e00\u4e2a\u662f<\/p>\n

<\/p>\n
\u975e\u8d2a\u5a6a\u5339\u914d<\/span><\/p>\n

<\/span><\/p>\n
\u6240\u8c13\u8d2a\u5a6a\u5339\u914d<\/p>\n

<\/p>\n
\u5c31\u662f\u6211\u4eec\u7684\u7b2c\u4e00\u6bb5\u4ee3\u7801<\/p>\n

<\/p>\n
\u4e00\u4e2a\u6570\u4e00\u4e2a\u6570\u90fd\u8981\u53bb\u5339\u914d<\/p>\n

<\/p>\n
\u800c\u975e\u8d2a\u5a6a\u5462<\/p>\n

<\/p>\n
\u6211\u4eec\u662f\u76f4\u63a5\u628a 100 \u7ed9\u5339\u914d\u51fa\u6765\u4e86<\/p>\n

<\/p>\n
\"python\"<\/p>\n

<\/p>\n

<\/p>\n
\u521a\u521a\u6211\u4eec\u7528\u5230\u7684<\/p>\n

<\/p>\n
.*\uff1f<\/strong><\/p>\n

<\/p>\n
\u662f\u6211\u4eec\u5728\u5339\u914d\u8fc7\u7a0b\u4e2d\u6700\u5e38\u4f7f\u7528\u5230\u7684<\/p>\n

<\/p>\n
\u8868\u793a\u7684\u5c31\u662f\u5339\u914d\u4efb\u610f\u5b57\u7b26<\/p>\n

<\/p>\n
\u4f46\u662f<\/p>\n

<\/p>\n
.*\uff1f\u7684 . \u4ee3\u8868\u6240\u6709\u7684\u5355\u4e2a\u5b57\u7b26\uff0c\u9664\u4e86 n r<\/p>\n

<\/p>\n
\u5982\u679c\u6211\u4eec\u7684\u5b57\u7b26\u4e32\u6709\u6362\u884c\u4e86<\/p>\n

<\/p>\n
\u600e\u4e48\u529e\u5462\uff1f<\/p>\n

<\/p>\n
\u6bd4\u5982\u8fd9\u6837<\/p>\n

<\/p>\n
content = \"\"\"Xiaoshuaib has 100 
<\/span>bananas\"\"\"<\/span><\/pre>\n

<\/p>\n
\u90a3\u4e48\u6211\u4eec\u5c31\u9700\u8981\u7528\u5230 re \u7684\u5339\u914d\u6a21\u5f0f\u4e86<\/p>\n

<\/p>\n
\u8bf4\u6765\u4e5f\u7b80\u5355<\/p>\n

<\/p>\n
\u76f4\u63a5\u7528 re.S \u5c31\u53ef\u4ee5\u4e86<\/p>\n

<\/p>\n
import <\/span>re

content = \"\"\"Xiaoshuaib has 100 
<\/span>bananas\"\"\"
<\/span>res = re.match('^Xi.*?(d+)s.*s$'<\/span>,<\/span>content,<\/span>re.S)
print<\/span>(res.group(1<\/span>))<\/pre>\n

<\/p>\n
\u53ef\u80fd\u6709\u4e9b\u670b\u53cb\u4f1a\u89c9\u5f97<\/p>\n

<\/p>\n
\u5339\u914d\u4e00\u4e2a\u4e1c\u897f\u8fd8\u8981\u5199\u5f00\u5934\u7ed3\u5c3e<\/p>\n

<\/p>\n
\u6709\u70b9\u9ebb\u70e6<\/p>\n

<\/p>\n
\u90a3\u4e48\u5c31\u53ef\u4ee5\u4f7f\u7528 re \u7684\u53e6\u4e00\u4e2a\u65b9\u6cd5\u4e86<\/p>\n

<\/p>\n

<\/p>\n
re.search<\/strong><\/p>\n

<\/p>\n

<\/p>\n
\u5b83\u4f1a\u76f4\u63a5\u53bb\u626b\u63cf\u5b57\u7b26\u4e32<\/p>\n

<\/p>\n
\u7136\u540e\u628a\u5339\u914d\u6210\u529f\u7684\u7b2c\u4e00\u4e2a<\/strong>\u7ed3\u679c\u7684\u8fd4\u56de\u7ed9\u4f60<\/p>\n

<\/p>\n
import <\/span>re

content = \"\"\"Xiaoshuaib has 100 
<\/span>bananas\"\"\"
<\/span>res = re.search('Xi.*?(d+)s.*s'<\/span>,<\/span>content,<\/span>re.S)
print<\/span>(res.group(1<\/span>))<\/pre>\n

<\/p>\n
\u8fd9\u6837\u5b50\u4e5f\u662f\u53ef\u4ee5\u83b7\u53d6 100 \u7684<\/p>\n

<\/p>\n
\u4f46\u662f\u5982\u679c\u6211\u4eec\u7684\u5185\u5bb9\u662f\u8fd9\u6837\u7684<\/p>\n

<\/p>\n
content = \"\"\"Xiaoshuaib has 100 bananas;
<\/span>Xiaoshuaib has 100 bananas;
<\/span>Xiaoshuaib has 100 bananas;
<\/span>Xiaoshuaib has 100 bananas;\"\"\"<\/span><\/pre>\n

<\/p>\n
\u60f3\u8981\u83b7\u53d6\u6240\u6709<\/strong>\u7684 100 \u5462\uff1f<\/p>\n

<\/p>\n
\u8fd9\u65f6\u5019\u5c31\u8981\u7528\u5230 re \u7684\u53e6\u4e00\u4e2a\u65b9\u6cd5\u4e86<\/p>\n

<\/p>\n

<\/p>\n
re.findall<\/strong><\/p>\n

<\/strong><\/p>\n
\u901a\u8fc7\u5b83\u6211\u4eec\u5c31\u80fd\u8f7b\u677e\u7684\u83b7\u53d6\u6240\u6709\u5339\u914d\u7684\u5185\u5bb9\u4e86<\/p>\n

<\/p>\n
import <\/span>re

content = \"\"\"Xiaoshuaib has 100 bananas;
<\/span>Xiaoshuaib has 100 bananas;
<\/span>Xiaoshuaib has 100 bananas;
<\/span>Xiaoshuaib has 100 bananas;\"\"\"
<\/span>res = re.findall('Xi.*?(d+)s.*?s;'<\/span>,<\/span>content,<\/span>re.S)
print<\/span>(res)<\/pre>\n

<\/p>\n
\u8fd9\u91cc\u7684\u7ed3\u679c\u662f<\/p>\n

<\/p>\n
[‘100’, ‘100’, ‘100’, ‘100’]<\/p>\n

<\/p>\n
\"python\"<\/p>\n

<\/p>\n
\u53c8\u6709\u670b\u53cb\u89c9\u5f97<\/p>\n

<\/p>\n
\u5982\u679c\u6211\u4eec\u60f3\u76f4\u63a5\u66ff\u6362\u5339\u914d\u7684\u5185\u5bb9\u5462<\/p>\n

<\/p>\n
\u5c31\u6bd4\u5982\u521a\u521a\u7684\u5b57\u7b26\u4e32<\/p>\n

<\/p>\n
\u53ef\u4e0d\u53ef\u4ee5\u628a 100 \u76f4\u63a5\u66ff\u6362\u6210 250 \u5462\uff1f<\/p>\n

<\/p>\n
\"python\"<\/p>\n

<\/p>\n
\u90a3\u5c31\u8981\u7528\u5230 re \u7684\u53e6\u4e00\u4e2a\u65b9\u6cd5\u4e86<\/p>\n

<\/p>\n

<\/p>\n
re.sub<\/strong><\/p>\n

<\/p>\n

<\/p>\n
\u53ef\u4ee5\u8fd9\u6837<\/p>\n

<\/p>\n
import <\/span>re

content = \"\"\"Xiaoshuaib has 100 bananas;
<\/span>Xiaoshuaib has 100 bananas;
<\/span>Xiaoshuaib has 100 bananas;
<\/span>Xiaoshuaib has 100 bananas;\"\"\"
<\/span>content = re.sub('d+'<\/span>,<\/span>'250'<\/span>,<\/span>content)
print<\/span>(content)<\/pre>\n

<\/p>\n
\u90a3\u4e48\u7ed3\u679c\u5c31\u53d8\u6210\u4e86<\/p>\n

<\/p>\n
Xiaoshuaib has 250 bananas;<\/p>\n
Xiaoshuaib has 250 bananas;<\/p>\n
Xiaoshuaib has 250 bananas;<\/p>\n
Xiaoshuaib has 250 bananas;<\/p>\n

<\/p>\n
250 \u4e2a\u9999\u8549<\/p>\n

<\/p>\n
\u5403….\u5f97\u5b8c\u4e48\uff1f\uff1f<\/p>\n

<\/p>\n
\"python\"<\/p>\n

<\/p>\n

<\/p>\n
\u518d\u6765\u8bf4\u8bf4 re \u7684\u53e6\u4e00\u4e2a\u5e38\u7528\u5230\u7684\u65b9\u6cd5\u5427<\/p>\n

<\/p>\n

<\/strong><\/p>\n
re.compile<\/strong><\/p>\n

<\/p>\n

<\/p>\n
\u8fd9\u4e2a\u4e3b\u8981\u5c31\u662f\u628a\u6211\u4eec\u7684\u5339\u914d\u7b26\u5c01\u88c5\u4e00\u4e0b<\/p>\n

<\/p>\n
import <\/span>re

content = \"Xiaoshuaib has 100 bananas\"
<\/span>pattern = re.compile('Xi.*?(d+)s.*s'<\/span>,<\/span>re.S)
res = re.match(pattern,<\/span>content)

print<\/span>(res.group(1<\/span>))<\/pre>\n

<\/p>\n

<\/p>\n
\u5176\u5b9e\u548c\u6211\u4eec\u4e4b\u524d\u5199\u7684\u4e00\u6837\u7684<\/p>\n

<\/p>\n
res = re.match('^Xi.*?(d+)s.*s$'<\/span>,<\/span>content,<\/span>re.S)<\/pre>\n

<\/p>\n
\u53ea\u4e0d\u8fc7 compile \u4e00\u4e0b<\/p>\n

<\/p>\n
\u4fbf\u4e8e\u4ee5\u540e\u590d\u7528<\/p>\n

<\/p>\n
\u597d\u4e86 <\/p>\n

<\/p>\n
\u5173\u4e8e re \u6a21\u5757\u548c\u6b63\u5219\u8868\u8fbe\u5f0f\u5c31\u4ecb\u7ecd\u5b8c\u5566<\/p>\n

<\/p>\n

<\/p>\n
\u77e5\u9053\u4e86\u600e\u4e48\u8bf7\u6c42\u6570\u636e<\/p>\n

<\/p>\n
\u4e5f\u77e5\u9053\u4e86\u5c06\u8fd4\u56de\u7684\u6570\u636e\u5982\u4f55\u6b63\u5219\u8fc7\u6ee4<\/p>\n

<\/p>\n
\u90a3\u4e48<\/p>\n

<\/p>\n
\u722c\u866b\u5bf9\u6211\u4eec\u6765\u8bf4\u8fd8\u96be\u4e48\uff1f<\/p>\n

<\/p>\n
\"python\"<\/p>\n

<\/p>\n

<\/p>\n
\u8fd9\u6b21\u672c\u7bc7\u771f\u7684\u5b8c\u5566<\/p>\n

<\/p>\n

<\/p>\n
\u518d\u89c1<\/p>\n

<\/p>\n

<\/p>\n
\"python\"<\/p>\n
\u626b\u4e00\u626b<\/span><\/strong><\/p>\n
\u5b66\u4e60 Python \u6ca1\u70e6\u607c<\/span><\/strong><\/p>\n

<\/span><\/strong><\/p>\n
\"python\"<\/p>\n

<\/p>\n

<\/p>\n
\u8fd1\u671f\u6587\u7ae0<\/p>\n

<\/p>\n
python\u722c\u866b03\uff1a\u90a3\u4e2a\u53eb\u505a Urllib \u7684\u5e93\u8ba9\u6211\u4eec\u7684 python \u5047\u88c5\u662f\u6d4f\u89c8\u5668<\/a>
<\/p>\n

<\/p>\n
python\u722c\u866b04|\u957f\u6c5f\u540e\u6d6a\u63a8\u524d\u6d6a\uff0cRequests \u5e93\u628a urllib \u5e93\u62cd\u5728\u6c99\u6ee9\u4e0a<\/a>
<\/p>\n

<\/p>\n
\u5bf9\u4e0d\u8d77\uff0c\u6211\u4e0d\u5e94\u8be5\u51fa\u8f68\u7684\uff01<\/a>
<\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n
\u4e5f\u4e0d\u77e5\u9053\u4e3a\u4ec0\u4e48<\/p>\n
\u4f60\u70b9\u4e86\u597d\u770b<\/span>\u4e4b\u540e<\/p>\n
\u4f60\u53d8\u5f97\u66f4\u597d\u770b\u4e86<\/p>\n
\n
\u539f\u6587\u59cb\u53d1\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7\uff08\u5b66\u4e60python\u7684\u6b63\u786e\u59ff\u52bf\uff09\uff1apython<\/a><\/p>\n<\/blockquote>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u73b0\u5728 \u4f60\u5df2\u7ecf\u4f1a\u4f7f\u7528 python \u6a21\u62df\u6d4f\u89c8\u5668 \u8fdb\u884c\u4e00\u4e9b Http \u7684\u8bf7\u6c42\u4e86 \u90a3\u4e48\u8bf7\u6c42\u5b8c\u4e4b\u540e \u670d\u52a1\u5668\u8fd4\u56de\u7ed9\u6211\u4eec\u4e00\u5806\u6e90\u4ee3\u7801 \u6211\u4eec\u53ef\u4e0d\u662f\u5565\u90fd\u8981\u7684\u554a \u6211\u4eec\u662f\u6709\u539f\u5219\u7684 \u6211\u4eec\u60f3\u8981\u7684\u4e1c\u897f \u600e\u4e48\u80fd\u4e00\u80a1\u8111\u7684\u5565\u90fd\u5f80\u81ea\u5df1\u515c\u91cc\u585e\u5462\uff1f \u4f7f\u4e0d\u5f97 \u4f7f\u4e0d\u5f97 \u6240\u4ee5 \u5728\u670d\u52a1\u5668\u8fd4\u56de\u7ed9\u6211\u4eec…<\/p>\n","protected":false},"author":1,"featured_media":1929,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[303],"tags":[302,19,300,301],"_links":{"self":[{"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/posts\/1928"}],"collection":[{"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1928"}],"version-history":[{"count":1,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/posts\/1928\/revisions"}],"predecessor-version":[{"id":1944,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/posts\/1928\/revisions\/1944"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/media\/1929"}],"wp:attachment":[{"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1928"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}