【python】字符串的替换

test====》

aaa

bbb

ccc

ddd

1.正则

import re

a = open('/root/test','r+')

f = a.readlines()

a.close()

for line in f:

b = re.sub('ddd','111',line.strip('\n'))

print b

*************************************************************

#!/usr/bin/env python

#-*- coding:utf-8 -*-

import os, re

FILE1 = open('file.txt', 'r')

file_content = FILE1.read()

FILE1.close()

print file_content

file_content = re.sub(r'bbb', 'eee', file_content)

FILE2 = open('file.txt', 'w')

FILE2.write(file_content)

FILE2.close()

##############################################

2. 列表替换

a=['aaa','bbb','ccc','ddd','eee','fff']

'---'.join(a).replace('bbb','eee').split('---')

['aaa','eee','ccc',ddd'','eee','fff']

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