class bank:

def user\_info(self):

    a=input('请输入用户信息：')

    # 不写encoding = 'utf-8'中文会乱码

    with open('info.txt','w',encoding='utf-8') as f:

        f.write(a)  
def get\_info(self):

    with open('info.txt','r',encoding='utf-8') as f:  
        print(f.read())

实力化类并调用方法

bank().user_info()

bank().get_info()

代码运行结果：

D:\py学习01\venv\Scripts\python.exe D:/py学习01/python基础/EX03.py
wiiofff非后方可