Update app.py

app.py

@@ -57,22 +57,21 @@ def process_text(inputs):
 
 import base64
 from io import BytesIO
-from delta import Delta, Renderer
-
+from delta import Delta, html
 from weasyprint import HTML
 
 def save_as_pdf(text):
-    # convert quill editor Delta object to HTML and render with Renderer
+    # convert quill editor Delta object to HTML
     delta = Delta(text)
-    html = Renderer().render(delta)
-
+    html_str = html.render(delta)
+    
     # convert HTML to PDF
     pdf_file = BytesIO()
-    HTML(string=html).write_pdf(pdf_file)
-
+    HTML(string=html_str).write_pdf(pdf_file)
+    
     # encode the PDF to base64
     b64 = base64.b64encode(pdf_file.getvalue()).decode('utf-8')
-
+    
     # generate a download link for the PDF
     href = f'<a href="data:application/octet-stream;base64,{b64}" download="output.pdf">Download PDF</a>'
     st.markdown(href, unsafe_allow_html=True)