What does the `in` operator in Python use for comparison?

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65909039/what-does-the-in-operator-in-python-use-for-comparison

Answer 1

As the docs say:

For container types such as list, tuple, set, frozenset, dict, or collections.deque, the expression x in y is equivalent to any(x is e or x == e for e in y).

So, it's both.