invalid-hash-returned / E0309

Message emitted:

__hash__ does not return int

Description:

Used when a __hash__ method returns something which is not an integer

Problematic code:

class CustomHash:
    """__hash__ returns dict"""

    def __hash__(self):  # [invalid-hash-returned]
        return {}

Correct code:

class CustomHash:
    """__hash__ returns `int`"""

    def __hash__(self):
        return 19

Created by the classes checker.