Python批量替换指定文件夹中文件内容

脚本说明：批量替换指定文件夹下文件内容

#coding:utf-8import osimport redef listFiles(dirPath):    fileList=[]    for root,dirs,files in os.walk(dirPath):for fileObj in files:    fileList.append(os.path.join(root,fileObj))    return fileListdef main():    fileDir = "You filedir"    regex = ur'FUNC_SYS_ADD_ACCDETAIL'    fileList = listFiles(fileDir)    for fileObj in fileList:f = open(fileObj,'r+')all_the_lines=f.readlines()f.seek(0)f.truncate()for line in all_the_lines:            str1 = 'original string'            str2 = 'replaced string'    f.write(line.replace(str1 , str2))    f.close()  if __name__=='__main__':    main()