OSError: [Errno 22] Invalid argument: 'D:\x07ckup\test.txt'

使用with open("D:\backup\test.txt","rt") as f:报上面的错误，将上面的语句改成

with open(r"D:\backup\test.txt","rt") as f:

字符串前面加r，表示的意思是禁止字符串转义