python从入门到实践 动手试一试

# 9-3
class User():
    def __init__(self, first_name, last_name):
        self.first_name = first_name
        self.last_name = last_name
        
    def describe_user(self):
        print('first_name:' + self.first_name.title() + ', last_name:' +
              self.last_name)

    def greet_user(self):
        print('Welcome ' + self.first_name.title() + ' ' +
              self.last_name.title())


userA = User('tom', 'while')
userA.describe_user()
userA.greet_user()

userB = User('li', 'time')
userB.describe_user()
userB.greet_user()
# 9-5
class User():
    def __init__(self, first_name, last_name):
        self.first_name = first_name
        self.last_name = last_name
        self.login_attempts = 0

    def describe_user(self):
        print('first_name:' + self.first_name.title() + ', last_name:' +
              self.last_name)

    def greet_user(self):
        print('Welcome ' + self.first_name.title() + ' ' +
              self.last_name.title())

    def increment_login_attempts(self, attempts):
        self.login_attempts += attempts
        print("You have attempted %s times." % self.login_attempts)

    def reset_login_attempts(self):
        self.login_attempts = 0
        print("You have attempted %s times." % self.login_attempts)


userA = User('tom', 'while')
userA.describe_user()
userA.greet_user()
userA.increment_login_attempts(2)
userA.reset_login_attempts()


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