chore: import upstream snapshot with attribution

python/dgl/sparse/utils.py

@@ -0,0 +1,14 @@
+"""Utilities for DGL sparse module."""
+from numbers import Number
+from typing import Union
+
+import torch
+
+
+def is_scalar(x):
+    """Check if the input is a scalar."""
+    return isinstance(x, Number) or (torch.is_tensor(x) and x.dim() == 0)
+
+
+# Scalar type annotation
+Scalar = Union[Number, torch.Tensor]