Check whether an item in a list exist in another list or not python
python
Solution
`bool(set(a)&set(b))` converts `a` and `b` into sets and then applies the intersection operator (`&`) on them. Then bool is applied on the resulting set, which returns `False` if the set is empty (no element is common), otherwise `True` (the set is non-empty and has the common element(s)).
Without using sets: `any(True for x in a if x in b)`. `any()` returns True if any one of the elements is true, otherwise False.
Problem
There are 2 list ``` a= [1,2,3] b = [1,2,3] ``` Now I want to check whether an element from `a` exist in `b` or not in python one-liner. I can use loop on `a` and then check if it exist in `b` or not. But I want something pythonic way (one-liner).