第五周作业

9-3、9-5、9-7、9-8

class Privileges():
    def __init__(self):
        self.privileges = ['can add post', 'can delete post',
                           'can ban user']

    def show_privileges(self):
        for privilege in self.privileges:
            print("Admin " + privilege)


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("This user is " +
              self.first_name.title() + " " + self.last_name.title())

    def greet_user(self):
        print("Hello, " +
              self.first_name.title() + " " + self.last_name.title())

    def increment_login_attempts(self):
        self.login_attempts += 1

    def reset_login_attempts(self):
        self.login_attempts = 0


class Admin(User):
    def __init__(self, first_name, last_name):
        super(Admin, self).__init__(first_name, last_name)
        self.privileges = Privileges()


user1 = User('kawhi', 'leonard')
user1.describe_user()
user1.greet_user()

user2 = User('tim', 'duncan')
user2.describe_user()
user2.greet_user()

user3 = User('klay', 'thompson')
user3.describe_user()
user3.greet_user()

user3.increment_login_attempts()
user3.increment_login_attempts()
print(user3.login_attempts)
user3.reset_login_attempts()
print(user3.login_attempts)

user4 = Admin('shaun', 'livingston')
user4.privileges.show_privileges()

9-14

from random import randint


class Die():
    def __init__(self, sides = 6):
        self.sides = sides

    def roll_die(self):
        return randint(1, self.sides)


die = Die()
for i in range(10):
    print(die.roll_die())

die = Die(10)
for i in range(10):
    print(die.roll_die())

die = Die(20)
for i in range(10):
    print(die.roll_die())

10-4

file_name = 'guest_book.txt'

with open(file_name, 'w') as file_object:
    while True:
        name = input("Please input your name(Enter 'q' to quit)")
        if name == 'q':
            break
        print("Hello, " + name)
        file_object.write(name + '\n')

10-7

print("Give me two numbers, and I'll add them.")
print("Enter 'q' to quit")

while True:
    a = input("The first number:")
    if a == 'q':
        break
    b = input("The second number:")
    if b == 'q':
        break
    try:
        c = int(a) + int(b)
    except ValueError:
        print("You should input a number.")
    else:
        print(c)
        break

10-12

import json

def get_number():
    file_name = 'number.json'
    try:
        with open(file_name) as f_obj:
            number = json.load(f_obj)
    except FileNotFoundError:
        return None
    else:
        return number


def FavoriteNumber():
    number = get_number()
    if number:
        print("I know your favorite number! It's " + str(number))
    else:
        number = input("What is your favorite number?")
        file_name = 'number.json'
        with open(file_name, 'w') as f_obj:
            json.dump(number, f_obj)


FavoriteNumber()