Typing

Author: caseyclements

bson/binary.py

@@ -487,6 +487,7 @@ def from_vector(
             vector = vector.data  # type: ignore
 
         padding = 0 if padding is None else padding
+        assert isinstance(dtype, BinaryVectorDtype)
         metadata = struct.pack("<sB", dtype.value, padding)
 
         if isinstance(vector, np.ndarray):