Fix JSON Pointer regression

jsonpath/pointer.py

@@ -166,6 +166,20 @@ def _handle_key_error(self, obj: Any, key: str, err: Exception) -> object:
         ):
             return key[1:]
 
+        # Handle dictionaries with integer or float keys. Note that JSON objects must
+        # have string keys. We are supporting this for historical reasons.
+        if isinstance(obj, Mapping):
+            try:
+                _key: Union[int, float] = int(key)
+            except ValueError:
+                try:
+                    _key = float(key)
+                except ValueError:
+                    raise JSONPointerKeyError(key) from err
+
+            if _key in obj:
+                return obj[_key]
+
         raise JSONPointerKeyError(key) from err
 
     def _handle_type_error(self, obj: Any, key: str, err: Exception) -> object:

tests/test_json_pointer.py

@@ -329,3 +329,17 @@ def test_index_like_token_on_object_value() -> None:
     data = {"foo": {"-1": "bar"}}
     pointer = JSONPointer("/foo/-1")
     assert pointer.resolve(data) == "bar"
+
+
+def test_dictionary_with_int_key() -> None:
+    # JSON object keys must be strings, but Python dicts can have integer keys.
+    data = {"foo": {1: "bar"}}
+    pointer = JSONPointer("/foo/1")
+    assert pointer.resolve(data) == "bar"
+
+
+def test_dictionary_with_float_key() -> None:
+    # JSON object keys must be strings, but Python dicts can have float keys.
+    data = {"foo": {1.1: "bar"}}
+    pointer = JSONPointer("/foo/1.1")
+    assert pointer.resolve(data) == "bar"