本文實例講述了python獲取文件后綴名及批量更新目錄下文件后綴名的方法。分享給大家供大家參考。具體實現(xiàn)方法如下：

1. 獲取文件后綴名：

復制代碼 代碼如下:#!/usr/bin/python

import os

dict = {}

for d, fd, fl in os.walk('/home/ahda/Program/'):

for f in fl:

sufix = os.path.splitext(f)[1][1:]

if dict.has_key(sufix):

dict[sufix] += 1

else:

dict[sufix] = 1

for item in dict.items():

print "%s : %s" % item

這里的關鍵是os.path.splitext()

如abc/ef.g.h ，這里獲取到的是h

2. python查找遍歷指定文件路徑下指定后綴名的文件實例：

復制代碼 代碼如下:import os

import sys

import os.path

for dirpath, dirnames, filenames in os.walk(startdir):

for filename in filenames:

if os.path.splitext(filename)[1] == '.txt':

filepath = os.path.join(dirpath, filename)

#print("file:" + filepath)

input_file = open(filepath)

text = input_file.read()

input_file.close()

output_file = open( filepath, 'w')

output_file.write(text)

output_file.close()

3. 批量重命名目錄中的文件后綴實例：

復制代碼 代碼如下:import os

def swap_extensions(dir, before, after):

if before[:1] != '.': #如果參數(shù)中的后綴名沒有'.'則加上

before = '.' + before

thelen = -len(before)

if after[:1] != '.':

after = '.' + after

for path, subdir, files in os.walk(dir):

for oldfile in files:

if oldfile[thelen:] == before:

oldfile = os.path.join(path, oldfile)

newfile = oldfile[:thelen] + after

os.rename(oldfile, newfile)

print oldfile +' changed to ' + newfile

if __name__ == '__main__':

import sys

if len(sys.argv) != 4:

print 'Usage:swap_extension.py rootdir before after'

sys.exit(1)

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

例子:將e:/py/test目錄下.php結尾的文件重命名為.py

E:py>python_cook e:/py/test .php .py

e:/py/testtest.php changed to e:/py/testtest.py

e:/py/test1.php changed to e:/py/test1.py

e:/py/test2.php changed to e:/py/test2.py

希望本文所述對大家的Python程序設計有所幫助。

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