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-rw-r--r--polymatrix/polymatrix/typing.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/polymatrix/polymatrix/typing.py b/polymatrix/polymatrix/typing.py
index 8626cf3..79b8161 100644
--- a/polymatrix/polymatrix/typing.py
+++ b/polymatrix/polymatrix/typing.py
@@ -169,6 +169,9 @@ class PolyMatrixDict(UserDict[MatrixIndex, PolyDict]):
return super().__setitem__(key, value)
+ def __getitem__(self, key: tuple[int, int] | MatrixIndex) -> PolyDict:
+ return super().__getitem__(cast(MatrixIndex, key))
+
def entries(self) -> Iterable[tuple[MatrixIndex, PolyDict]]:
yield from self.items()