Is there a short contains function for lists?
collections, contains, list, python, search
Solution
Use:
if my_item in some_list:
...
Also, inverse operation:
if my_item not in some_list:
...
It works fine for lists, tuples, sets and dicts (check keys).
Note that this is an O(n) operation in lists and tuples, but an O(1) operation in sets and dicts.
Problem
Given a list `xs` and a value `item`, how can I check whether `xs` contains `item` (i.e., if any of the elements of `xs` is equal to `item`)? Is there something like `xs.contains(item)`? For performance considerations, see Fastest way to check if a value exists in a list.