[TOC] >[success] # 文字替换 re.sub和str.replace >[danger] ##### str.replace ~~~ line = "asdf fjdk; afed,asdf, foo foo" line_replace = line.replace("asdf", "ss") print(line_replace) 打印结果： ss fjdk; afed,ss, foo foo ~~~ >[danger] ##### re.sub("正则把什么"，“替换成什么”，在哪个str中) ~~~ import re line = "asdf fjdk; afed,asdf, foo foo" a = re.sub(r'(^a\w+)',"bbb",line) print(a) 打印结果： bbb fjdk; afed,asdf, foo foo ~~~ >[danger] ##### sub 日期替换例子 ~~~ import re line = "Today is 11/27/2012 pyCon starts 3/13/2013" # 利用分组 重新匹配顺序 a = re.sub(r'(\d+)/(\d+)/(\d+)',r'\3-\1-\2',line) print(a) 打印结果： Today is 2012-11-27 pyCon starts 2013-3-13 ~~~