Update src/chains/qa_chain_openai.py

src/chains/qa_chain_openai.py

@@ -6,8 +6,10 @@ from langchain.chat_models import ChatOpenAI
 from langchain.chains import create_retrieval_chain
 from langchain.chains.combine_documents import create_stuff_documents_chain
 from src.agents.prompts import RAG_PROMPT
+import os
 import shutil
 
+
 def build_openai_rag_chain_and_llm(pdf_path: str):
     # Load and split documents
     loader = PyPDFLoader(pdf_path)