changed the default return type to None in convert_json_field_to_pandas_type

Khemkaran · Khemkaran · commit 8de59222e555 · 2025-07-22T19:44:41.000+05:30
diff --git a/pandas/io/json/_table_schema.py b/pandas/io/json/_table_schema.py
@@ -195,7 +195,7 @@ def convert_json_field_to_pandas_type(field) -> str | CategoricalDtype:
     """
     typ = field["type"]
     if typ == "string":
-        return field.get("extDtype", "object")
+        return field.get("extDtype", None)
     elif typ == "integer":
         return field.get("extDtype", "int64")
     elif typ == "number":
diff --git a/pandas/tests/io/json/test_json_table_schema.py b/pandas/tests/io/json/test_json_table_schema.py
@@ -547,7 +547,7 @@ def test_convert_pandas_type_to_json_field_categorical(self, kind, ordered):
                 },
                 CategoricalDtype(categories=["a", "b", "c"], ordered=True),
             ),
-            ({"type": "string"}, "object"),
+            ({"type": "string"}, None),
         ],
     )
     def test_convert_json_field_to_pandas_type(self, inp, exp):

Original file line number	Diff line number	Diff line change
`@@ -547,7 +547,7 @@ def test_convert_pandas_type_to_json_field_categorical(self, kind, ordered):`
`547`	`547`	`},`
`548`	`548`	`CategoricalDtype(categories=["a", "b", "c"], ordered=True),`
`549`	`549`	`),`
`550`		`- ({"type": "string"}, "object"),`
	`550`	`+ ({"type": "string"}, None),`
`551`	`551`	`],`
`552`	`552`	`)`
`553`	`553`	`def test_convert_json_field_to_pandas_type(self, inp, exp):`