方法1:[：：2]
如果索引是有等差数列:比如[2,4,6,8]
[：：2]：每隔2个取一个
a = [1,2,3,4,5]
print(a[::2])
- 输出
[1, 3, 5]
方法2:for循环：
b=[0,2]
a = ['elem0','elem1','elem2']
sublist = [a[i] for i in b]
方法3:itemgetter函数
from operator import itemgetter
b=[0,2]
a = ['elem0','elem1','elem2']
print(itemgetter(*b)(a))
- 输出：
('elem0', 'elem2')