Python implements replacement strings in multiple files __python

Import string
import os
import struct
import re
import fileinput
import Fnmatch

Fileinput and Fnmatch Two module are mainly used here

Fnmatch.fnmatch is primarily used to determine the suffix name of a file

Fnmatch. Fnmatch (filename, pattern) for pattern:

*.txt→txt file

*.doc→doc file

*.*→ All Files

The fileinput in the inplace=true indicates that the output is redirected to the file. This way all print output points to a file.

def walkdir (directory, ext= ' *.* ', topdown=true):
    filearray = [] for
    root, dirs, files in Os.walk (directory, Topdo WN): For
        name in files:
            if Fnmatch.fnmatch (name, ext):
                filearray.append (Os.path.abspath os.path.join ( root, name)) return
    Filearray

def replaceinfile (filename, strfrom, Strto): For line in
    Fileinput.input ( FileName, inplace=true):
        if Re.search (Strfrom, line): Line
            = Line.replace (strfrom, strto)
        print line,

if __name__ = = ' __main__ ': for
    filename in Walkdir ('. ', ' *.txt '):
        replaceinfile (filename, ' abc ', ' CBA ')