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

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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.tldaddress = 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