020_with

#!/usr/bin/env python
# Author:liujun

with open("test","r",encoding="utf-8") as f:
    for line in f:
        print(line.strip())


with open("test","r",encoding="utf-8") as f,open("test.bak","w",encoding="utf-8") as f_new:
    for line in f:
        f_new.write(line.upper())

020_with

原文：https://www.cnblogs.com/liujun5319/p/9594199.html