Backport PR pandas-dev#51674 on branch 2.0.x (BUG: ArrowDtype().type raising for fixed size pa binary) (pandas-dev#51776)

Backport PR pandas-dev#51674: BUG: ArrowDtype().type raising for fixed size pa binary

Co-authored-by: Patrick Hoefler <[email protected]>

Author: meeseeksmachine

pandas/core/arrays/arrow/dtype.py

@@ -108,7 +108,11 @@ def type(self):
             return float
         elif pa.types.is_string(pa_type):
             return str
-        elif pa.types.is_binary(pa_type):
+        elif (
+            pa.types.is_binary(pa_type)
+            or pa.types.is_fixed_size_binary(pa_type)
+            or pa.types.is_large_binary(pa_type)
+        ):
             return bytes
         elif pa.types.is_boolean(pa_type):
             return bool

pandas/tests/extension/test_arrow.py

@@ -1399,6 +1399,11 @@ def test_mode_dropna_false_mode_na(data):
     tm.assert_series_equal(result, expected)
 
 
+@pytest.mark.parametrize("arrow_dtype", [pa.binary(), pa.binary(16), pa.large_binary()])
+def test_arrow_dtype_type(arrow_dtype):
+    assert ArrowDtype(arrow_dtype).type == bytes
+
+
 def test_is_bool_dtype():
     # GH 22667
     data = ArrowExtensionArray(pa.array([True, False, True]))