操作列表的部分练习

1.遍历列表

pets = [' cat ', ' dog ', 'bird']

for pet in pets:

    printf(' A '+pet+' wound make a great pet!\n')

printf( 'Any of these animals wound make a great pet!\n')

2.列表解析与数值列表

square = [value**2 for value in range(1,18,3)]    #列表解析

print(square)

print(max(square))   #打印最大值

print(sum(square))   #打印列表元素的和

3.列表切片

foods = ['pizza', 'falafel', 'carrot cake', 'cannoli' , 'ice cream']

f_food = foods[:2]    #复制前两个元素

print(f_food)

h_food = foods[2:-1]    #复制第三个元素之后的所有元素

print(h_food)