如何用python从文中获取文件名再用正则表达式批量修改文件名,python批量处理文件名称

import osx = 1while x < 101:if x < 10:file_name = "0"+str(x) + ".txt" #10一下则前面补零file = open(file_name)else:file_name = str(x) + ".txt"file = open(file_name)line = file.readline()file.close()os.rename(file_name,line) #重命名x = x + 1