Update app.py

app.py

@@ -11,10 +11,9 @@ from langchain.chains.question_answering import load_qa_chain
 from langchain.prompts import PromptTemplate
 from langchain_community.document_loaders import PyPDFLoader
 from langchain_chroma import Chroma
-from langchain_community.vectorstores import Chroma
 from langchain_community.embeddings import HuggingFaceEmbeddings
 # Load model directly
-from transformers import AutoModelForCausalLM
+#from transformers import AutoModelForCausalLM
 
 
 access_token = os.getenv("HUGGINGFACE_API_KEY")
@@ -67,7 +66,7 @@ def text_splitter(text):
 
 #GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY")
 #COHERE_API_KEY = os.getenv("COHERE_API_KEY")
-#HUGGINGFACE_API_KEY = os.getenv("HUGGINGFACE_API_KEY")
+HUGGINGFACE_API_KEY = os.getenv("HUGGINGFACE_API_KEY")
 
 def get_conversational_chain(retriever):
     prompt_template = """