Update app.py

app.py

@@ -36,7 +36,7 @@ def create_plotly_tree():
         hoverinfo='text',
         marker=dict(showscale=False, size=10, color='#850', line_width=2))
 
-    fig = go.Figure(data=[edge_trace, node_trace],
+    fig = go.FigureWidget(data=[edge_trace, node_trace],
                     layout=go.Layout(
                         showlegend=False,
                         hovermode='closest',