请教WINDOWS下关于re.sub替换获取路径问题

wdfwdf2727

def main(dir1,dir2):
    #source_file=dir_test(dir1,dir2)
    d=filecmp.dircmp(dir1,dir2）
    diff_file1=d.diff_files
    diff_file2=d.left_only  
    dir1_path=os.path.abspath(dir1)
    dir2_path=os.path.abspath(dir2)
    if not dir1.endswith("\\"):dir1_path = dir1_path + "\\"
    if not dir2.endswith("\\"):dir2_path = dir2_path + "\\"
    [file_list.append(dir1_path+x) for x in diff_file1]
    [file_list.append(dir1_path+x) for x in diff_file2]
    if len(d.common_dirs)>0:
        for i in d.common_dirs:
            dir_test(dir1_path+i,dir2_path+i)
    dir1=os.path.abspath(dir1)
    destination_file=[]
    print dir1,dir2
    for item in file_list:
        destination_file.append(re.sub(re.escape(dir1),re.escape(dir2),item))
    print file_list[0]
    print destination_file[0]
if __name__=='__main__':
    main("d:\\pycham","d:\\pycham1")
------------------输出如下-----------------
d:\pycham d:\pycham1\
d:\pycham\7.txt
d\:\pycham1\7.txt
—————————————————————-
最后一行盘符后面的那个斜杠怎么去掉？

wdfwdf2727

re.sub(re.escape(dir1),re.escape(dir2),item))
替换为
re.sub(dir1,dir2,item)
后
----------------输出如下
d:\pycham d:\pycham1
d:\pycham\7.txt
d:\pycham\7.txt
没有替换d:\pycham为d:\pycham1