From ba3e02d7993368a32aa53eeed4294024dbeddd61 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Mon, 22 May 2023 14:41:50 -0700
Subject: [PATCH] BUG: Correct .type for pyarrow.map_ and pyarrow.struct types

---
 doc/source/whatsnew/v2.0.2.rst       | 1 +
 pandas/core/dtypes/dtypes.py         | 2 ++
 pandas/tests/extension/test_arrow.py | 3 ++-
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/doc/source/whatsnew/v2.0.2.rst b/doc/source/whatsnew/v2.0.2.rst
index 52d2730195a56..cec201db7e216 100644
--- a/doc/source/whatsnew/v2.0.2.rst
+++ b/doc/source/whatsnew/v2.0.2.rst
@@ -25,6 +25,7 @@ Fixed regressions
 
 Bug fixes
 ~~~~~~~~~
+- Bug in :class:`.arrays.ArrowExtensionArray` incorrectly assigning ``dict`` instead of ``list`` for ``.type`` with ``pyarrow.map_`` and raising a ``NotImplementedError`` with ``pyarrow.struct`` (:issue:`53328`)
 - Bug in :func:`api.interchange.from_dataframe` was raising ``IndexError`` on empty categorical data (:issue:`53077`)
 - Bug in :func:`api.interchange.from_dataframe` was returning :class:`DataFrame`'s of incorrect sizes when called on slices (:issue:`52824`)
 - Bug in :func:`api.interchange.from_dataframe` was unnecessarily raising on bitmasks (:issue:`49888`)
diff --git a/pandas/core/dtypes/dtypes.py b/pandas/core/dtypes/dtypes.py
index a3481cbe9eae1..96776c0e4b890 100644
--- a/pandas/core/dtypes/dtypes.py
+++ b/pandas/core/dtypes/dtypes.py
@@ -2051,6 +2051,8 @@ def type(self):
         elif pa.types.is_list(pa_type) or pa.types.is_large_list(pa_type):
             return list
         elif pa.types.is_map(pa_type):
+            return list
+        elif pa.types.is_struct(pa_type):
             return dict
         elif pa.types.is_null(pa_type):
             # TODO: None? pd.NA? pa.null?
diff --git a/pandas/tests/extension/test_arrow.py b/pandas/tests/extension/test_arrow.py
index 1b0786bcd5d2e..9129e84700a55 100644
--- a/pandas/tests/extension/test_arrow.py
+++ b/pandas/tests/extension/test_arrow.py
@@ -1570,7 +1570,8 @@ def test_mode_dropna_false_mode_na(data):
         [pa.large_string(), str],
         [pa.list_(pa.int64()), list],
         [pa.large_list(pa.int64()), list],
-        [pa.map_(pa.string(), pa.int64()), dict],
+        [pa.map_(pa.string(), pa.int64()), list],
+        [pa.struct([("f1", pa.int8()), ("f2", pa.string())]), dict],
         [pa.dictionary(pa.int64(), pa.int64()), CategoricalDtypeType],
     ],
 )