switched to a single array representation (#39)

Author: swilly22

redisgraph/graph.py

@@ -112,28 +112,16 @@ def query(self, q):
         response = self.redis_con.execute_command("GRAPH.QUERY", self.name, q, "--compact")
         return QueryResult(self, response)
 
-    def _execution_plan_to_string(self, plan, plan_str, ident=0):
-        plan_str += ("\t" * ident) + plan[0] + "\n"
-        for i in range (1, len(plan)):
-            plan_str = self._execution_plan_to_string(plan[i], plan_str, ident+1)
-        return plan_str
+    def _execution_plan_to_string(self, plan):
+        return "\n".join(plan)
 
     def execution_plan(self, query):
         """
-        Get the execution plan for given query.
-        GRAPH.EXPLAIN returns a nested set of arrays
-        the first element of each array is a string representing
-        the current operation, followed by 0 or more sub-arrays
-        one for each child operation.
+        Get the execution plan for given query,
+        GRAPH.EXPLAIN returns an array of operations.
         """
         plan = self.redis_con.execute_command("GRAPH.EXPLAIN", self.name, query)
-        plan_str = ""
-        # TODO: Consider switching to a tree structure
-        # https://treelib.readthedocs.io/en/latest/
-        # make sure we're able to search for a specific operation
-        # within the tree.
-        plan_str = self._execution_plan_to_string(plan, plan_str)
-        return plan_str
+        return self._execution_plan_to_string(plan)
 
     def delete(self):
         """