这本书是我自学Python的第一本书，里面的习题都在寒假已经完成，由于当时博客尚未搭建，故里面题目的答案并未发表。现在在开发项目博客没有新内容更新，因此这段实践会陆续上传原来的习题答案。每个题目均为自己设计的代码，优化与重构方面与标准答案可能有所不同。
参考教材：《Python编程从入门到实践》 【美】 Eric Matthes 著
Chapter7
7-1 汽车租赁：编写一个程序，询问用户要租赁什么样的汽车，并打印一条消息，如“Let me see if I can find you a Subaru”。
#!/usr/bin/env python
# -*- coding:utf-8 -*-
car = input("Hello,what type car is you want to have? ")
print("Let me see if I can find you a " + car + ".")7-2 餐厅订位L:编写一个程序，询问用户有多少人用餐。如果超过8人，就打印一条消息，指出没有空桌；否则指出有空桌。
#!/usr/bin/env python
# -*- coding:utf-8 -*-
number = input("How many people are in your dinner party tonight? ")
number = int(number)
if number > 8:
print("I'm sorry, you'll have to wait for a table.")
else:
print("Your table is ready.")7-3 10的整数倍：让用户输入一个数字，并指出这个数字是否是10的整数倍。
#!/usr/bin/env python
# -*- coding:utf-8 -*-
number = input("Please enter a number,and I'll tell you if it's a multiple of 10. ")
number = int(number)
if number % 10 == 0:
print("It's a multiple of 10.")
else:
print("It is't a multiple of 10.")7-4 比萨配料：编写一个循环，提示用户输入一系列的比萨配料，并在用户输入’quit’时结束循环。每当用户输入一种配料后，都打印一条消息，说我们会在比萨中添加这种配料。
#!/usr/bin/env python
# -*- coding:utf-8 -*-
prompt = "\nPlease enter the toppings that you want to have."
prompt += "\nAnd if you enter 'quit',we will finished. "
while True:
topping = input(prompt)
if topping != 'quit':
print("I'll add " + topping + " to your pizza.")
else:
break7-5 电影票：有家电影院根据观众的年龄收取不同的票价；不到3岁的观众免费；3~12岁的观众为10美元；超过12岁的观众为15美元。请编写一个循环，在其中询问用户的年龄，并指出其票价。
#!/usr/bin/env python
# -*- coding:utf-8 -*-
prompt = "How old are you?"
prompt += "\nEnter 'quit' when you are finished. "
while True:
age = input(prompt)
if age == "quit":
break
age = int(age)
if age < 3:
print("You get in free!")
elif age < 13:
print("Your ticket is $10.")
else:
print("Your ticket is $15.")7-6 三个入口：以另一种方式完成练习7-4或练习7-5，在程序中采取如下所有做法。
□ 在while循环中使用条件测试来结束循环。
□ 使用变量active来控制循环结束的时机。
□ 使用break语句在用户输入‘quit’时退出循环。
#!/usr/bin/env python
# -*- coding:utf-8 -*-
prompt = "How old are you?"
prompt += "\nEnter 'quit' when you are finished. "
active = True
while active:
age = input(prompt)
if age == "quit":
break
age = int(age)
if age < 3:
print("You get in free!")
elif age < 13:
print("Your ticket is $10.")
else:
print("Your ticket is $15.")7-7 无限循环：编写一个没完没了的循环，并运行它（要结束该循环，可按Ctrl+C，也可关闭显示输出的窗口）。
#!/usr/bin/env python
# -*- coding:utf-8 -*-
while True:
number = input("Please enter a number!")
print(str(number))7-8 熟食店：创建一个名为sandwich_orders的列表，在其中包含各种三明治的名字；再创建一个名为finished_sandwich的空列表，遍历列表sandwich_orders，对于其中的每种三明治，都打印一条消息，如I made your tuna sandwich，并将其移到列表finished_sandwich。所有三明治都制作好后，打印一条消息，将这些三明治列出来。
#!/usr/bin/env python
# -*- coding:utf-8 -*-
sandwich_orders = ['meat', 'eggplant', 'fruit']
finished_sandwiches = []
while sandwich_orders:
current_sandwich = sandwich_orders.pop()
print("I made your " + current_sandwich + " sandwich.")
finished_sandwiches.append(current_sandwich)
print("\nThe following sandwich have been finished")
for finished_sandwiched in finished_sandwiches:
print(finished_sandwiched)7-9 五项烟熏牛肉（pastrami）卖完了：使用为练习7-8而创建的列表sandwich_orders，并确保’pastrami’在其中至少出现了三次。在程序开头附近添加这样的代码；打印一条消息，指出熟食店的五香烟熏牛肉卖完了；再使用一个while循环将列表sandwich_orders中的’pastrami’都删除。确保最终的列表finished_sandwiches中不包含’pastrami’。
#!/usr/bin/env python
# -*- coding:utf-8 -*-
sandwich_orders = ['meat', 'pastrami', 'eggplant', 'pastrami', 'fruit', 'pastrami']
print("Sorry,pastrami has been sold.")
while 'pastrami' in sandwich_orders:
sandwich_orders.remove('pastrami')
print(sandwich_orders)7-10 梦想的度假胜地：编写一个程序，调查用户梦想的度假胜地。使用类似于’If you could visit one place in the world，where would you go？’的提示，并编写一个打印调查结果的代码块。
#!/usr/bin/env python
# -*- coding:utf-8 -*-
responses = {}
# 先设置一个标记
active = True
while active:
# 先采集用户的姓名
name = input("What is your name! ")
response = input("which places would you like to visit in the world. ")
responses[name] = response
repeat = input("Would you like to let another person respond?(yes/no)")
if repeat == 'no':
active = False
# 展示采集的信息
print("\n--- Poll Results ---")
for name,response in responses.items():
print(name.title() + " want to visit " + response + ".")
