2018.09.19python作业

需求：在一个数据文件中，让用户输入信息
with open(r'bd.py',mode='rt',encoding='utf-8') as f:
    count=0
    while count<=3:
        name=input("please input account: ")
        password=input("please input password: ")
        for msg in f:
    
            if name == msg.strip('\n').split(':')[0] and password == msg.strip('\n').split(':')[1]:
                print("login successful")
                break
        else:
            print("sb")
            count+=1