python 查找替换

发布时间:2019-07-16 10:09:38编辑:auto阅读(1664)

    [root@localhost ~]# less txt

    123 345 678

    accdfesdfdsf

    [root@localhost ~]# less tihuan.py

    #!/usr/bin/env python

    import re

    wenjian = open('txt','r+')

    a = wenjian.read()

    wenjian.seek(0,0)


    f = (r'123')

    b =re.findall(f,a)

    if b != []:

       wenjian.write(a.replace(f,'zzh'))

       wenjian.close()


    [root@localhost ~]# ./tihuan.py

    [root@localhost ~]# less txt

    zzh 345 678

    accdfesdfdsf


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