Fix enum hashing issues.

These were always supposed to be hashable, but the equality check to
prevent comparing enums of different types caused the hash function to be
undefined.

Author: HexDecimal

CHANGELOG.rst

@@ -16,6 +16,9 @@ Added
 Changed
  - Using `libtcod 1.18.0`.
 
+Fixed
+ - `tcod.event.KeySym` and `tcod.event.Scancode ` can now be hashed.
+
 12.3.2 - 2021-05-15
 -------------------
 Changed

tcod/event.py

@@ -1678,6 +1678,10 @@ def __eq__(self, other: Any) -> bool:
             )
         return super().__eq__(other)
 
+    def __hash__(self) -> int:
+        # __eq__ was defined, so __hash__ must be defined.
+        return super().__hash__()
+
 
 class KeySym(enum.IntEnum):
     """Keyboard constants based on their symbol.
@@ -2216,6 +2220,10 @@ def __eq__(self, other: Any) -> bool:
             )
         return super().__eq__(other)
 
+    def __hash__(self) -> int:
+        # __eq__ was defined, so __hash__ must be defined.
+        return super().__hash__()
+
 
 __all__ = [  # noqa: F405
     "Modifier",