Update app.py

app.py

@@ -6,6 +6,7 @@ Automatically generated by Colab.
 Original file is located at
     https://colab.research.google.com/drive/1okJv7Jo4ki4K6puMKiDLsn9bG7OV_LAF
 """
+import os
 
 #!pip install gradio requests smolagents pandas langchain-community wikipedia arxiv pymupdf langchain-groq sympy pytube pytesseract Pillow google-generativeai