使用python的chardet库获得文件编码并修改编码

首先需要安装chardet库，有很多方式，我才用的是比较笨的方式：sudo pip install chardet

#!/usr/bin/env python
# coding: UTF-8
import sys
import os
import chardet 
def print_usage():

print '''usage:

change_charset [file|directory] [charset] [output file]\n

for example:

  change 1.txt utf-8 n1.txt

  change 1.txt utf-8

  change . utf-8

  change 1.txt
'''
def get_charset(s):

return chardet.detect(s)['encoding']
 
def remove(file_name):

os.remove(file_name)
 
def change_file_charset(file_name, output_file_name, charset):

f = open(file_name)

s = f.read()

f.close()

if file_name == output_file_name or output_file_name == "":


remove(file_name)

old_charset = get_charset(s)

u = s.decode(old_charset)

if output_file_name == "":


output_file_name = file_name

f = open(output_file_name, 'w')

s = u.encode(charset)

f.write(s)

f.close()
 
def do(file_name, output_file_name, charset):

if os.path.isdir(file_name):


for item in os.listdir(file_name):



try:




if os.path.isdir(file_name+"/"+item):





do(file_name+"/"+item, "", charset)




else:





change_file_charset(file_name+"/"+item, "", charset)



except OSError, e:




print e

else:


change_file_charset(file_name, output_file_name, charset)
 
if __name__ == '__main__':

length = len(sys.argv)

if length == 1:


print_usage()

elif length == 2:


do(sys.argv[1], "", "utf-8")

elif length == 3:


do(sys.argv[1], "", sys.argv[2])

elif length == 4:


do(sys.argv[1], sys.argv[3], sys.argv[2])

else:


print_usage()