title: Animated plotly-express graph not showing up in jupyter-lab
body: <p>The following example produces an animated graph that can be displayed with <code>jupyter notebook</code>, but in <code>jupyter-lab</code> the graph does not show up.</p>
  
  <pre><code>%pylab inline
  import plotly.express as px
  gapminder = px.data.gapminder()
  px.scatter(gapminder, x="gdpPercap", y="lifeExp", animation_frame="year", animation_group="country",
             size="pop", color="continent", hover_name="country",
             log_x=True, size_max=55, range_x=[100,100000], range_y=[25,90])
  </code></pre>
  
  <p>Using plotly 4.0.0 and plotly_express 0.4.0.</p>
  
  <p>Any idea what might be going wrong?</p>