第二周——第四章操作列表作业

4-1 披萨pizzas=["mango","cheese","durian"]
for pizza in pizzas:
print("i like ",pizza,"pizza.")
print("i really love pizza.")输出i like mango pizza.
i like cheese pizza.
i like durian pizza.
i really love pizza.
4-2 动物animals = ["cow","sheep","pig"]
for animal in animals:
print(animal,"eats delicous.")
print("all of this can be food.")输出cow eats delicous.
sheep eats delicous.
pig eats delicous.
all of this can be food.4-10 切片

animals = ["cow","sheep","pig"]
print("the first item in the list are ",animals[0:1])
print("the first item in the list are ",animals[1:2])
print("the first item in the list are ",animals[2:3])

输出the first item in the list are ['cow']
the first item in the list are ['sheep']
the first item in the list are ['pig']4-11 你的披萨和我的披萨
my_pizzas=["mango","cheese","durian"]
friend_pizza = my_pizzas[:]
my_pizzas.append("cannoli")
friend_pizza.append("ice cream")
print("my favorite pizzas are ",end='')
for pizza in my_pizzas:
print(pizza," ",end='')
print("\nmy friend's favorite pizzas are ",end='')
for pizza in friend_pizza:
print(pizza," ",end='')输出my favorite pizzas are mango cheese durian cannoli
my friend's favorite pizzas are mango cheese durian ice cream
4-12 使用多个for循环my_foods = ['pizza','falafel','carrot cake']
friend_foods = my_foods[:]
print('my favorite foods are: ')
for food in my_foods:
print(food,' ')
print('my friend\'s favorite foods are: ')
for food in friend_foods:
print(food,' ')输出my favorite foods are:
pizza
falafel
carrot cake
my friend's favorite foods are:
pizza
falafel
carrot cake