合并txt文档

import os

filedir = os.getcwd() + "\微信文章\四大名著"
print(filedir)
filenames = os.listdir(filedir)
print(filenames)

file=open('文件目录.txt','w',encoding="utf-8")
# #向文件中写入字符
#
# #先遍历文件名
for filename in filenames:
  filepath=filedir+'\'
  filepath=filepath+filename
#   #遍历单个文件，读取行数
  for line in open(filepath,'r+',encoding="utf-8"):
      file.writelines(line)
      file.write('
')

file.close()