From ce2dbe99e84b18af079223bea180587cbdc062ab Mon Sep 17 00:00:00 2001
From: Slava Skvortsov <29122694+SlavaSkvortsov@users.noreply.github.com>
Date: Thu, 23 Sep 2021 11:43:50 +0200
Subject: [PATCH] Fix unprocessed key

---
 deepdiff/deephash.py | 7 +++----
 tests/test_hash.py   | 4 ++--
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/deepdiff/deephash.py b/deepdiff/deephash.py
index 4a9445fa..b8c54725 100644
--- a/deepdiff/deephash.py
+++ b/deepdiff/deephash.py
@@ -13,9 +13,8 @@
 from deepdiff.base import Base
 logger = logging.getLogger(__name__)
 
-UNPROCESSED_KEY = 'unprocessed'
+UNPROCESSED_KEY = object()
 
-RESERVED_DICT_KEYS = {UNPROCESSED_KEY}
 EMPTY_FROZENSET = frozenset()
 
 INDEX_VS_ATTRIBUTE = ('[%s]', '.%s')
@@ -185,7 +184,7 @@ def _getitem(hashes, obj, extract_index=0):
             except KeyError:
                 raise KeyError(HASH_LOOKUP_ERR_MSG.format(obj)) from None
 
-        if isinstance(obj, strings) and obj in RESERVED_DICT_KEYS:
+        if obj is UNPROCESSED_KEY:
             extract_index = None
 
         return result_n_count if extract_index is None else result_n_count[extract_index]
@@ -229,7 +228,7 @@ def _get_objects_to_hashes_dict(self, extract_index=0):
         """
         result = dict_()
         for key, value in self.hashes.items():
-            if key in RESERVED_DICT_KEYS:
+            if key is UNPROCESSED_KEY:
                 result[key] = value
             else:
                 result[key] = value[extract_index]
diff --git a/tests/test_hash.py b/tests/test_hash.py
index 3097be9e..ba61fbfc 100755
--- a/tests/test_hash.py
+++ b/tests/test_hash.py
@@ -134,7 +134,7 @@ def __repr__(self):
         t1 = Bad()
 
         result = DeepHash(t1)
-        expected_result = {t1: unprocessed, 'unprocessed': [t1]}
+        expected_result = {t1: unprocessed, UNPROCESSED_KEY: [t1]}
         assert expected_result == result
 
     def test_built_in_hash_not_sensitive_to_bytecode_vs_unicode(self):
@@ -407,7 +407,7 @@ def __str__(self):
         t1 = Bad()
 
         result = DeepHashPrep(t1)
-        expected_result = {t1: unprocessed, 'unprocessed': [t1]}
+        expected_result = {t1: unprocessed, UNPROCESSED_KEY: [t1]}
         assert expected_result == result
 
     class Burrito: