day06_03 购物车讲解01

1.0 思路

1.1 列表嵌套

# name1 = ['mac','book','bike','kindle']
a = [[1,2,3],'alex',(2,3,4)]
print(a[0])
#>>>[1, 2, 3]
print(a[0][1])
#>>>2
a[0][2] = 4
print(a)
#>>>[[1, 2, 4], 'alex', (2, 3, 4)]