added type annotation to JSONDtype.na_value (#31718)

Author: SaturnFromTitan

pandas/tests/extension/json/array.py

@@ -16,7 +16,7 @@
 import random
 import string
 import sys
-from typing import Type
+from typing import Any, Mapping, Type
 
 import numpy as np
 
@@ -27,7 +27,7 @@
 class JSONDtype(ExtensionDtype):
     type = abc.Mapping
     name = "json"
-    na_value = UserDict()
+    na_value: Mapping[str, Any] = UserDict()
 
     @classmethod
     def construct_array_type(cls) -> Type["JSONArray"]:

setup.cfg

@@ -138,9 +138,6 @@ ignore_errors=True
 [mypy-pandas.tests.extension.decimal.test_decimal]
 ignore_errors=True
 
-[mypy-pandas.tests.extension.json.array]
-ignore_errors=True
-
 [mypy-pandas.tests.extension.json.test_json]
 ignore_errors=True