Update app.py

app.py

@@ -32,6 +32,7 @@ import vega_datasets
 
 # Enable Panel extensions
 pn.extension(design='bootstrap')
+pn.extension('vega')
 
 # Define a function to create and return a plot
 
@@ -62,7 +63,7 @@ def create_plot(subgroup, date_range, moving_av_window):
         )
 
     # Return the combined chart
-    return plot
+    return pn.pane.Vega(plot)
 
 # Create the selection widget
 dropdown = pn.widgets.Select(options=['All polls', 'Adults', 'Voters'], name='Select')
@@ -86,6 +87,7 @@ final_test = pn.Row(pn.bind(create_plot, subgroup=dropdown,
 
 # Combine everything in a Panel Column to create an app
 maincol = pn.Column()
+maincol.append("# SI649 Altair Assignment 3 Visualization 4")
 maincol.append(final_test)
 maincol.append(dropdown)
 maincol.append(date_range_slider)