Update app.py

app.py

@@ -27,8 +27,6 @@ CHROMA_DIR = "docs/chroma/"
 
 MODEL_NAME = "gpt-4"
 
-QA_CHAIN = None;
-
 def invoke(openai_api_key, youtube_url, process_video, prompt):
     openai.api_key = openai_api_key
     if (process_video):
@@ -39,10 +37,10 @@ def invoke(openai_api_key, youtube_url, process_video, prompt):
         splits = text_splitter.split_documents(docs)
         vectordb = Chroma.from_documents(documents = splits, embedding = OpenAIEmbeddings(), persist_directory = CHROMA_DIR)
         llm = ChatOpenAI(model_name = MODEL_NAME, temperature = 0)
-        global QA_CHAIN = RetrievalQA.from_chain_type(llm, retriever = vectordb.as_retriever(), return_source_documents = True, chain_type_kwargs = {"prompt": QA_CHAIN_PROMPT})
+        global qa_chain = RetrievalQA.from_chain_type(llm, retriever = vectordb.as_retriever(), return_source_documents = True, chain_type_kwargs = {"prompt": QA_CHAIN_PROMPT})
     else:
         print(222)
-    result = QA_CHAIN({"query": prompt})
+    result = qa_chain({"query": prompt})
     shutil.rmtree(YOUTUBE_DIR)
     #shutil.rmtree(CHROMA_DIR)
     return result["result"]