Update app.py

app.py

@@ -1,11 +1,15 @@
+!pip install gradio PyMuPDF langchain tiktoken openai faiss-cpu
+
 import gradio as gr
 import fitz
-from PyPDF2 import PdfReader
 from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain.text_splitter import CharacterTextSplitter
 from langchain.vectorstores import FAISS
 from langchain.chains.question_answering import load_qa_chain
 from langchain.llms import OpenAI
+from google.colab import files
+
+openai_api_key = os.environ.get('OPENAI_API_KEY')
 
 def read_pdf(pdf_file, prompt):
     try:
@@ -25,7 +29,7 @@ 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")