Apply suggestions from code review

Author: tswast

pandas/core/arrays/arrow/accessors.py

@@ -40,10 +40,12 @@ def __init__(self, data=None) -> None:
     def _validate(self, data):
         dtype = data.dtype
         if not isinstance(dtype, ArrowDtype):
-            raise TypeError(self._validation_msg.format(dtype=dtype))
+            # Raise AttributeError so that reflection handles non-struct Series correctly.
+            raise AttributeError(self._validation_msg.format(dtype=dtype))
 
         if not pa.types.is_struct(dtype.pyarrow_dtype):
-            raise TypeError(self._validation_msg.format(dtype=dtype))
+            # Raise AttributeError so that reflection handles non-struct Series correctly.
+            raise AttributeError(self._validation_msg.format(dtype=dtype))
 
     @property
     def dtypes(self) -> Series:

pandas/tests/series/accessors/test_struct_accessor.py

@@ -143,5 +143,5 @@ def test_struct_accessor_explode():
 def test_struct_accessor_api_for_invalid(invalid):
     msg = re.escape(StructAccessor._validation_msg.format(dtype=invalid.dtype))
 
-    with pytest.raises(TypeError, match=msg):
+    with pytest.raises(AttributeError, match=msg):
         invalid.struct