get() and tests for get()

tests/test_udict.py

@@ -74,6 +74,20 @@ def test_set_item(self):
         d[:] = [1, 2]
         self.assertDictEqual(d.dictionary, {'hello': 1, 'hi': 2})
 
+    def test_get(self):
+        d = UDict({2: 1, 4: 91, 1: 12})
+        self.assertEqual(d.get(index=1), d.get(key=2))
+        self.assertEqual(d.get(index=2), d.get(key=4))
+        self.assertEqual(d.get(index=3), d.get(key=1))
+
+    # TODO: test_del_item
+    # TODO: test_len_and_iter
+    # TODO: test_bool
+    # TODO: test_contains
+    # TODO: test_str_and_repr
+    # TODO: test_cmp_and_eq
+    # TODO: test_math_operations
+
 
 if __name__ == '__main__':
     unittest.main()

ufpy/udict.py

@@ -137,6 +137,23 @@ def __delitem__(self, key: KT | int | slice) -> None:
 
         self.__dict = del_items_for_several_keys(self.__dict, keys)
 
+    # get
+    def get(self, *, key: KT | None = None, index: int | None = None) -> VT | DV:
+        """
+        Get a value with key or it's index.
+
+        :param key: Key of value in dict (optional)
+        :param index: Index of value in dict (optional)
+        :return: Value or default value
+
+        :exception ValueError: You defined both key and index params
+        """
+        if key and index:
+            raise ValueError('You defined both key and index params. Please cancel the definition one of this params.')
+        if index and index > len(self):
+            raise IndexError('Index is bigger that length of UDict.')
+        return self[self.keys[index-1]] if index else self[key]
+
     # Len, iterator and reversed version
     def __len__(self) -> int:
         return len(self.items)