Update app.py

app.py

@@ -23,9 +23,9 @@ def define_embeddings_llm(openai_key):
     embeddings = HuggingFaceEmbeddings(
                 model_name="sentence-transformers/all-MiniLM-L6-v2"
             )
-    model_id = "lmsys/vicuna-7b-v1.3"
-    pipe = pipeline("text-generation", model=model_id, max_length=2048)
-    llm = HuggingFacePipeline(pipeline=pipe)
+    HuggingFaceHub(repo_id="MBZUAI/LaMini-Flan-T5-248M" ,
+                         model_kwargs={"max_length":2048,"do_sample":True,
+                                       "temperature":0.2})
   langchain.llm_cache = InMemoryCache()
   return embeddings,llm