Fixed issue #2598 - make Document class subscriptable

Author: aksinha334

redis/commands/search/document.py

@@ -11,3 +11,6 @@ def __init__(self, id, payload=None, **fields):
 
     def __repr__(self):
         return f"Document {self.__dict__}"
+
+    def __getitem__(self, item):
+        return self.Document[item]