Update app.py

app.py

@@ -139,8 +139,7 @@ def create_vector_db(final_items):
     global db
     client = chromadb.Client()
     collection_name = "BioModelsRAG"
-    print(f"Collection '{collection_name}' already exists.")
-    db = client.get_collection(name=collection_name, embedding_function="all-MiniLM-L6-v2")
+    db = client.get_or_create_collection(name=collection_name, embedding_function = "all-MiniLM-L6-v2")
 
     # Initialize Llama model
     llm = Llama.from_pretrained(