{"id":171944,"date":"2022-04-09T22:41:35","date_gmt":"2022-04-09T14:41:35","guid":{"rendered":"http:\/\/www.idc.net\/help\/171944\/"},"modified":"2022-04-09T22:41:35","modified_gmt":"2022-04-09T14:41:35","slug":"%e5%90%8e%e6%b5%aa%e4%ba%91python%e6%95%99%e7%a8%8b%ef%bc%9apython3%e4%b8%ad%e7%9a%84re%e6%a8%a1%e5%9d%97%e7%ae%80%e5%8d%95%e4%bb%8b%e7%bb%8d%e5%8f%8a%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/171944\/","title":{"rendered":"\u540e\u6d6a\u4e91Python\u6559\u7a0b\uff1apython3\u4e2d\u7684re\u6a21\u5757\u7b80\u5355\u4ecb\u7ecd\u53ca\u4f7f\u7528"},"content":{"rendered":"

<\/p>\n

\u6211\u4eec\u5b66\u4e60\u6bcf\u4e2a\u7ae0\u8282\u3002\u603b\u4f1a\u9047\u5230\u5404\u79cd\u6a21\u5757\uff0c\u6a21\u5757\u91cc\u9644\u5e26\u7740\u5404\u79cd\u65b9\u6cd5\uff0c\u6559\u8fc7\u5927\u5bb6\u5982\u679c\u6548\u7387\u7684\u53c8\u8ba1\u5212\u5b66\u4e60\u5404\u4e2a\u6a21\u5757\uff0c\u90a3\u5c31\u662f\u5148\u7406\u89e3\u6a21\u5757\uff0c\u5728\u6293\u4f4f\u6a21\u5757\u91cc\u91cd\u70b9\u65b9\u6cd5\uff0c\u53d6\u5176\u7cbe\u534e\uff0c\u53bb\u5176\u7cdf\u7c95\u3002\u4e25\u683c\u6309\u7167\u8fd9\u6837\u7684\u65b9\u5f0f\uff0c\u7ed9\u5927\u5bb6\u7f16\u5199\u51fa\u4ee5\u4e0b\u5173\u4e8e<\/span>RE\u6a21\u5757\u7684\u4ecb\u7ecd\u53ca\u4f7f\u7528\uff0c\u5185\u5bb9\u4e0d\u591a\uff0c\u6709\u9700\u6c42\u7684\u53ef\u4ee5\u5e26\u7740\u9879\u76ee\u5bfc\u5165\u5b66\u4e60\u3002<\/span><\/p>\n

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

re\u6a21\u5757\u76f8\u5173\u65b9\u6cd5\uff1a<\/span><\/strong><\/strong><\/p>\n

\u4e0b\u9762\u7ed9\u5927\u5bb6\u6f14\u793a<\/span>re\u6a21\u5757\u4e2d\u5e38\u89c1\u7684\u65b9\u6cd5\u4f7f\u7528<\/span><\/strong><\/strong><\/p>\n

re.match\uff1a<\/span><\/p>\n

n <\/span>match:\u4ece\u5934\u5f00\u59cb\u5339\u914d<\/span><\/p>\n

n <\/span>\u9700\u6c42\uff1a\u5b57\u7b26\u4e32\u524d<\/span>5\u4f4d\u5fc5\u987b\u662f\u6570\u5b57 \u5b9e\u73b0\u8fc7\u7a0b\uff1a<\/span><\/p>\n

\u793a\u4f8b\uff1a<\/span><\/strong><\/p>\n

\u4f7f\u7528<\/span>re.match\u65b9\u6cd5\u6b63\u5219\u8868\u8fbe\u5f0f\uff1br'\\d{5}'\uff1a5\u4e2a\u6570\u5b57, \\d\u4ee3\u8868\u6570\u5b57(0~9)\uff0c{5}\u4ee3\u8868\u51fa\u73b05\u6b21\uff1b<\/span><\/p>\n

\u8fd4\u56de<\/span>match\u5bf9\u8c61\u3002<\/span><\/p>\n

s1 = '12345abcd'\ns2 = '123abcdef'\nmatch1 = re.match(r'\\d{5}', s1)\nmatch2 = re.match(r'\\d{5}', s2)\nprint(match1)\nprint(match2)<\/pre>\n
\u7ed3\u679c<\/span>, match2\u4e3aNone\uff1a<\/span><\/p>\n
<re.Match object; span=(0, 5), match='12345'>\nNone<\/pre>\n
\u90fd\u638c\u63e1\u4f4f<\/span>re\u6a21\u5757\u4e86\u5417\uff1f\u672c\u7bc7\u6587\u7ae0\u5927\u5bb6\u53ea\u9700\u8981\u77e5\u9053re\u6a21\u5757\u548c\u5e38\u7528\u7684\u65b9\u6cd5\uff0c\u4ee5\u53ca\u5c0f\u7f16\u7ed9\u5927\u5bb6\u6f14\u793a\u7684\u5b9e\u4f8b\u5e94\u7528\u5373\u53ef\uff0c\u5b66\u4e60\u7f16\u7a0b\u5e76\u4e0d\u96be\uff0c\u6709\u6548\u7387\u5b66\u4e60\u624d\u662f\u91cd\u70b9\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"
\u6211\u4eec\u5b66\u4e60\u6bcf\u4e2a\u7ae0\u8282\u3002\u603b\u4f1a\u9047\u5230\u5404\u79cd\u6a21\u5757\uff0c\u6a21\u5757\u91cc\u9644\u5e26\u7740\u5404\u79cd\u65b9\u6cd5\uff0c\u6559\u8fc7\u5927\u5bb6\u5982\u679c\u6548\u7387\u7684\u53c8\u8ba1\u5212\u5b66\u4e60\u5404\u4e2a\u6a21\u5757\uff0c\u90a3\u5c31\u662f\u5148\u7406\u89e3\u6a21 […]<\/p>\n","protected":false},"author":1,"featured_media":171945,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[182397],"tags":[],"class_list":["post-171944","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\/171944","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=171944"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/171944\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media\/171945"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=171944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=171944"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=171944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}