fix TypeError (#2050)

Author: dvora-h

redis/commands/graph/commands.py

@@ -194,6 +194,8 @@ def execution_plan(self, query, params=None):
             query = self._build_params_header(params) + query
 
         plan = self.execute_command("GRAPH.EXPLAIN", self.name, query)
+        if isinstance(plan[0], bytes):
+            plan = [b.decode() for b in plan]
         return "\n".join(plan)
 
     def explain(self, query, params=None):

redis/commands/graph/execution_plan.py

@@ -67,6 +67,9 @@ def __init__(self, plan):
         if not isinstance(plan, list):
             raise Exception("plan must be an array")
 
+        if isinstance(plan[0], bytes):
+            plan = [b.decode() for b in plan]
+
         self.plan = plan
         self.structured_plan = self._operation_tree()