Update app.py

app.py

@@ -133,14 +133,14 @@ def process_documents(files, chunk_size, chunk_overlap, embedding_model):
 
     # Create vector store
     try:
-        # Reset ChromaDB client to avoid tenant issues
+        # Use a unique collection name to avoid conflicts
+        collection_name = f"doctalk_collection_{int(time.time())}"
         client = chromadb.PersistentClient(path=PERSIST_DIRECTORY)
-        client.reset()
         vector_store = Chroma.from_documents(
             documents=doc_splits,
             embedding=embeddings,
             persist_directory=PERSIST_DIRECTORY,
-            collection_name="doctalk_collection"
+            collection_name=collection_name
         )
         return f"Processed {len(documents)} documents into {len(doc_splits)} chunks.", None
     except Exception as e:
@@ -167,7 +167,7 @@ def initialize_qa_chain(llm_model, temperature):
             memory=memory
         )
         logger.info(f"Initialized QA chain with {llm_model}.")
-        return "QA chain initialized successfully.", None
+        return "QA Doctor: QA chain initialized successfully.", None
     except Exception as e:
         logger.error(f"Error initializing QA chain for {llm_model}: {str(e)}")
         return f"Error initializing QA chain: {str(e)}. Ensure your HF token has access to {llm_model}.", None