Update app.py

app.py

@@ -55,7 +55,6 @@ def invoke(openai_api_key, prompt, rag_option):
         if (rag_option == RAG_LANGCHAIN):
             rag = LangChainRAG()
             completion, callback = rag.rag_chain(config, prompt)
-
             result = completion["result"]
         elif (rag_option == RAG_LLAMAINDEX):
             rag = LlamaIndexRAG()
@@ -63,10 +62,7 @@ def invoke(openai_api_key, prompt, rag_option):
         else:
             rag = LangChainRAG()
             completion, callback = rag.llm_chain(config, prompt)
-            
-            if (completion.generations[0] != None and 
-                completion.generations[0][0] != None):
-                result = completion.generations[0][0].text
+            result = completion.generations[0][0].text
     except Exception as e:
         err_msg = e