Update app.py

app.py

@@ -36,6 +36,9 @@ Follow these simple steps to interact with the chatbot:
 def get_pdf(uploaded_file):
     if uploaded_file :
         temp_file = "./temp.pdf"
+        # Delete the existing temp.pdf file if it exists
+        if os.path.exists(temp_file):
+            os.remove(temp_file)
         with open(temp_file, "wb") as file:
             file.write(uploaded_file.getvalue())
             file_name = uploaded_file.name