替换文本字符

#!/usr/bin/env python

‘‘‘Replace oldfile‘s char ‘wang‘ to char ‘yuan‘

replace char ‘wang‘ to char ‘yuan‘,and write

the changed  file into ‘newfile‘

in production environment

replace the keychars following:

oldfile wang yuan newfile

‘‘‘

oldfile = raw_input(‘which file do you want to replace: ‘)

newfile = raw_input(‘Enter a name for new file: ‘)

oldchar = raw_input(‘which character do you wang to replace: ‘)

newchar = raw_input(‘Enter the New character: ‘)

for line in open(‘%s‘ % oldfile):

open(‘%s‘ % newfile,‘a‘).write(line.replace(‘%s‘ % oldchar,‘%s‘ % newchar))