Python 网络用户类：定义与实例化

class User:
    totalUser = 0

    def __init__(self, id, password):
        self.id = id
        self.password = password
        self.username = None
        self.emailAdrr = None
        self.emailAdrr = self.username + '@gameschool.com'
        User.totalUser += 1


user1 = User(1, 'password1')
user2 = User(2, 'password2')
user3 = User(3, 'password3')

print('用户总人数:', User.totalUser)