用Python将另一个列表中的任何项目

Question

What is an elegant way to return a list of T/F for a list if matches a list of items?

For example:

[1,3,5,4]
in
[4,3,7,5,8]

Returns:

[True, True, False, True, False]

Answer 1

Testing membership in a set is O(1), while testing membership in a list is O(n). So (especially for a big list) you should convert firstlist to a set before testing for membership.

firstset = set(firstlist)
[(v in firstset) for v in otherlist]

Answer 2

Use List Comprehension: -

>>> list1 = [4, 3, 7, 5, 8]
>>> list2 = [1, 3, 5, 4]
>>> new_list = [elem in list2 for elem in list1]
>>> new_list
[True, True, False, True, False]
>>> 

Answer 3

通过使用列表理解：

[(v in firstlist) for v in otherlist]