指定文件夹，指定文件类型，替换该文件夹下全部文件的内容。

注意在window下的读写内容需要指定编码，还需要在文件头指定#coding:utf-8 编码，避免出现编码问题。

复制代码 代码如下:

coding:utf-8

import os
import os.path

path='.'
oldStr='.php'
newStr='.html'

for (dirpath, dirnames, filenames) in os.walk(path):
for file in filenames:
if os.path.splitext(file)[1]=='.html':
print(file)
filepath=os.path.join(dirpath,file)
try:
text_file = open(filepath, "r")
lines = text_file.readlines()
text_file.close()
output = open(filepath,'w',encoding= 'utf-8')
for line in lines:

print(line)

                if not line:  
                    break  
                if(oldStr in line):  
                    tmp = line.split(oldStr)  
                    temp = tmp[0] + newStr + tmp[1]  
                    output.write(temp)  
                else:  
                    output.write(line)  
            output.close()  
        except Exception:  
            print(Exception)  
            break