deepdiff seralizing python dict keys

Author: seperman

deepdiff/serialization.py

@@ -14,7 +14,7 @@
 import ipaddress
 from copy import deepcopy, copy
 from functools import partial
-from collections.abc import Mapping
+from collections.abc import Mapping, KeysView
 from typing import (
     Callable, Optional, Union,
     overload, Literal, Any,
@@ -93,6 +93,7 @@ class UnsupportedFormatErr(TypeError):
     'ipaddress.IPv6Network',
     'ipaddress.IPv4Address',
     'ipaddress.IPv6Address',
+    'collections.abc.KeysView',
 }
 
 
@@ -124,6 +125,7 @@ class UnsupportedFormatErr(TypeError):
     'iprange': str,
     'IPv4Address': ipaddress.IPv4Address,
     'IPv6Address': ipaddress.IPv6Address,
+    'KeysView': list,
 }
 
 
@@ -624,6 +626,7 @@ def _serialize_tuple(value):
     NotPresent: str,
     ipranges: str,
     memoryview: lambda x: x.tobytes(),
+    KeysView: list,
 }
 
 if PydanticBaseModel is not pydantic_base_model_type:

tests/test_serialization.py

@@ -450,3 +450,8 @@ def test_reversed_list(self):
 
         assert '[3,2,1]' == serialized
         assert '[3,2,1]' == serialized2, "We should have copied the original list. If this returns empty, it means we exhausted the original list."
+
+    def test_dict_keys(self):
+        dic = {"foo": "bar", "apple": "too sweet"}
+        serialized = json_dumps(dic.keys())
+        assert '["foo","apple"]' == serialized