python脚本在目录下所有文件中进行字符串替换

循环，对每个文件：先读入，得到替换后的串，再写入

import os
path="E:\lab\批量替换\bvh\"

files=os.listdir(path)#获取文件名
i=0
print(len(files))
for i in range(len(files)):
    with open(path+files[i],"r+") as f:
        data=f.read()
        #print(data)
        data=data.replace("frames :","frames:")
        data=data.replace("frame Time :","frame Time:") 
    with open(path+files[i],"w+") as f:
        f.write(data)
    i+=1

（一通简单粗暴的操作。。。