Update app.py

app.py

@@ -50,7 +50,7 @@ def upload_file_and_update_dropdown(file):
         # Save the file to the upload directory
         file_path = os.path.join(PDF_FOLDER, file.name)
         with open(file_path, "wb") as f:
-            f.write(file.data)
+            f.write(file)
 
         # Get the updated list of files
         files = os.listdir(PDF_FOLDER)