Update app.py

app.py

@@ -16,6 +16,7 @@ from docx import Document
 from docx.shared import Pt
 from docx.enum.style import WD_STYLE_TYPE
 from PyPDF2 import PdfReader
+from io import StringIO
 
 # Initialize Dash app
 app = dash.Dash(__name__, external_stylesheets=[dbc.themes.BOOTSTRAP])