【foo.py】
# encoding: utf-8
# author: walker
# date: 2019-07-15
# summary: 一種正則和 lambda 的有趣結合
import re
dic = {'user': 'walker', 'domain': '163.com'}
rule = r'%user%@%domain%'
email = re.sub('%[^%]*%', lambda matchobj: dic[matchobj.group(0).strip('%')], rule)
print('email: %s' % email) # [email protected]【相關閱讀】
*** walker ***