Update rag_langgraph.py

rag_langgraph.py

@@ -128,6 +128,8 @@ def run_multi_agent(prompt):
     
     graph = workflow.compile()
 
+    result = ""
+
     for s in graph.stream(
         {
             "messages": [
@@ -137,6 +139,7 @@ def run_multi_agent(prompt):
     ):
         if "__end__" not in s:
             print(s)
+            result += s
             print("----")
         
-    return "DONE"
+    return result