feedback: add assert to maybe_castable

pandas-dev · Oct 11, 2020 · cb90e32 · cb90e32
1 parent 6768396
commit cb90e32
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/pandas/core/dtypes/cast.py b/pandas/core/dtypes/cast.py
@@ -1286,6 +1286,8 @@ def convert_dtypes(
 def maybe_castable(arr: np.ndarray) -> bool:
     # return False to force a non-fastpath
 
+    assert isinstance(arr, np.ndarray)  # GH 37024
+
     # check datetime64[ns]/timedelta64[ns] are valid
     # otherwise try to coerce
     kind = arr.dtype.kind