Convert masked arrays to valid numpy dtype

phofl · Sep 3, 2023 · c3c718c · c3c718c
1 parent c866a4a
commit c3c718c
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/pandas/core/arrays/masked.py b/pandas/core/arrays/masked.py
@@ -475,7 +475,14 @@ def to_numpy(
         if na_value is lib.no_default:
             na_value = libmissing.NA
         if dtype is None:
-            dtype = object
+            if self._hasna:
+                itemsize = self.dtype.itemsize
+                if itemsize < 4:
+                    itemsize = 4
+                dtype = np.dtype(f"f{itemsize}")
+                na_value = np.nan
+            else:
+                dtype = self.dtype.numpy_dtype
         else:
             dtype = np.dtype(dtype)
         if self._hasna: