用python删除java文件头上版权信息的方法

# -*- coding: utf8 -*- 
''''' 
删除java文件头部的版权等注释 
package之上的部分 
''' 
import os 
import sys 

def delHeader(filepath): 
if os.path.exists(filepath) : 
file = open(filepath) 
lines = file.readlines() 
beforeTag = True 
writer = open(filepath,'w') 
for line in lines : 
if 'package' in line: 
beforeTag = False 
if beforeTag == False: 
writer.write(line) 

if __name__ == '__main__': 
path='F:spacexxxsrc' 
list = os.walk(path,True) 
for dir in list: 
files = dir[2] 
for file in files : 
if '.java' in file : 
filepath = os.path.join(dir[0],file) 
print filepath 
delHeader(filepath) 

print 'Complete!!!!!!!!!!!!!!!'