《Python编程：从入门到实践》习题答案——第4章 操作列表_零基础学python第四章实战答案

# 4.1披萨：
citys = ['Shanghai','Beijing','Wuhu','Shenzhen','HongKong']
for city in citys:
    print("I like " + city  + ".\n")
print("I really love city.")
 
# 4.2动物：
animals = ['cat', 'dog', 'panda', 'monkey']
for animal in animals:
    print(animal)
    print(f"A {animal} would make a great pet.")
print("\nAny of these animals would make a great a great pet!")
 
# 4-3 数到20
for value in range(1,21):
    print(value)
 
# 4-4 一百万
one_millions =list(range(1,1000001))
print(f"打印1~1000000的列表：{one_millions}")
 
# 4-5 计算1~1000000的总和
print(min(one_millions))
print(max(one_millions))
print(sum(one_millions))
 
# 4-6 奇数：用range（）创建一个列表，包含1~20的奇数；再用for循环打印出来
odd_numbers = list(range(1,20,2))
print(f"1~20之间的奇数：{odd_numbers}")
 
for value in odd_numbers:     # 再用for循环打印出来
    print(value)
 
# 4-7 3的倍数：创建一个列表，包含3~30内能被3整除的数字；再用for循环打印出来
three_numbers = list(range(3,31,3))
print(f"3~30之间的奇数：{three_numbers}")
for value in three_numbers:
    print(value)
 
# 4-8 立方：打印1~10的立方
cubes =[]
for value in range(1,11):
    cube = value*value*value
    cubes.append(cube)
print(cubes)
 
for num in cubes:       
    print(num)
 
# 或者：不使用中间变量cube
cubes = []
for value in range(1,11):
    cubes.append(value*value*value)
print(cubes)
 
# 4-9 立方解析
cubes = [value*value*value for value in range(1,11) ]
print(f"1~10的立方：{cubes}")
for value in cubes:
    print(value)
 
# 4-10 切片
my_list = [1,2,3,4,5,6,7,8,9]
print(f"前三个元素:{my_list[:3]}")
print(f"中间三个元素：{my_list[3:6]}")
print(f"末尾三个元素：{my_list[-3:]}")
 
# 4-11 你的披萨和我的披萨
my_magicians = ['alice','david','carolina']
friend_magicians = my_magicians[:]    # 相当于副本
my_magicians.append('bob')
friend_magicians.append('liming')
print(f"My_magicians are {my_magicians}")
for my_magician in friend_magicians:
    print(my_magician)
print("\n")
print(f"Friend_magicians are {friend_magicians}")
for friend_magician in friend_magicians:
    print(friend_magician)
 
# 4-12 使用多个循环：
my_foods = ['pizza', 'falafel', 'carrot cake']
friend_foods = my_foods[:]
for my_food in my_foods:
    print(my_food)
 
# 4-13-自助餐
foods = ('rich','peanut','dumpling','potato','cake')  # 创建一个食物元组
for food in foods:
    print(food)
# foods[0] = ice cream   #尝试修改元组，但出现报错，说明元组不可修改
foods = ('rich','beef','dumpling','bacon','noodle')   # 重新定义变量，这是可以的
print("\n")
for food in foods:
    print(food)
 
# 4-14 PEP8：
 
# 4-15 代码审核：