added text streamer

backend.py

@@ -41,14 +41,13 @@ parser = SentenceSplitter.from_defaults(
                 chunk_size=256, chunk_overlap=64, paragraph_separator="\n\n"
             )
 
-@spaces.GPU(duration=20)
 def build_index():
     # Load documents from a file
-    documents = SimpleDirectoryReader(input_files=["data/blockchainprova.txt"]).load_data()
+    documents = SimpleDirectoryReader(input_files=["data/blockchainprova.txt"]).load_data().
     # Parse the documents into nodes
-    nodes = parser.get_nodes_from_documents(documents)
+    nodes = parser.get_nodes_from_documents(documents).
     # Build the vector store index from the nodes
-    index = VectorStoreIndex(nodes)
+    index = VectorStoreIndex(nodes).
     
     return index
 
@@ -58,7 +57,6 @@ index = build_index()
 @spaces.GPU(duration=20)
 def handle_query(query_str, chathistory):
   
-
   
     qa_prompt_str = (
         "Context information is below.\n"