学习笔记(04):Python 面试100讲（基于Python3.x）-请使用代码描述with语句的作用

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1.with 语句用法

2.with 语句用于自定义的类

class Myclass:
    def __enter__(self):
        print('enter is run')
    def  py1(self,):
        print('py1 is run')
    def _exit__(self,):
        print('exit is run',type,value,traceback)