Update app.py

app.py

@@ -1,5 +1,6 @@
 import gradio as gr
 import fitz
+import os 
 from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain.text_splitter import CharacterTextSplitter
 from langchain.vectorstores import FAISS
@@ -27,10 +28,10 @@ def read_pdf(pdf_file, prompt):
         texts = text_splitter.split_text(text)
         
         # download embedding from OpenAI
-        embeddings = OpenAIEmbeddings()
+        embeddings = OpenAIEmbeddings(api_key=openai_api_key)
         docsearch = FAISS.from_texts(texts, embeddings)
         
-        chain = load_qa_chain(OpenAI(), chain_type="stuff")
+        chain = load_qa_chain(OpenAI(api_key=openai_api_key), chain_type="stuff")
 
         docs = docsearch.similarity_search(prompt)
         answer = chain.run(input_documents = docs, question = prompt)