python - 类型错误子设置字符串列表 - Python 3

Question

我正在尝试从另一个列表中提取一个列表的子集，但我收到了一个TypeError。

a = ('one', 'two', 'two', 'three', 'four', 'five', 'three', 'three', 'eight', 'nine', 'ten')
a = list(a)
b = ('two', 'three', 'eight', 'nine')
b = list(b)
c = [a[i] for i in b]  # subsets list a for what's in list b

返回:

TypeError: list indices must be integers or slices, not str

我在找什么:

print(a)
('two', 'two', 'three', 'three', 'three', 'eight', 'nine')

Answer 1

从 a 中获取 b 中的项目:

c = [i for i in a if i in b]
print(c)

输出:

['two', 'two', 'three', 'three', 'three', 'eight', 'nine']