PyCon 2011 - Hidden Treasures of the Python Standard Library - 邮件地址正则表达式匹配

本作品采用知识共享署名-非商业性使用-相同方式共享 3.0 Unported许可协议进行许可。允许非商业转载，但应注明作者及出处。

作者：liuyuan_jq

2011-03-30

---

#!/usr/bin/env python # encoding: utf-8 """Positve look-ahead and negative look-behind assertions """ import re # An email address: username@domain.tld address = re.compile( r''' # Limit the top-level domains (?=.*\.(?:com|org|edu)$) ^( [\w\d.+-]+ # Account name (?<!noreply) # Ignore "noreply" @[\w\d.+-]+ # Domain name )$ ''', re.UNICODE | re.VERBOSE) candidates = [ 'first.last@example.com', 'user@example.org', 'ignored@example.co.uk', 'noreply@example.com', ] for candidate in candidates: # print '{0:25}'.format(candidate), print '%25s' % (candidate,), match = address.search(candidate) if match: print 'MATCH ', match.groups() else: print 'NO MATCH'

运行结果

---

first.last@example.com MATCH ('first.last@example.com',) user@example.org MATCH ('user@example.org',) ignored@example.co.uk NO MATCH noreply@example.com NO MATCH