title: Plotly: How to colorcode plotly graph objects bar chart using Python?
body: <pre><code>def update_graph_bar(named_count,**kwargs):
  
  traces = list()
  df = pd.DataFrame(list(Message.objects.all().values()))
  available_indicators = list(df['content'].unique())
  for t in available_indicators:
      traces.append(go.Bar(
          x=[t],
          y=[df[df['content']==t]['timestamp'].count()],
          name='{}'.format(t),text=[df[df['content']==t]['timestamp'].count()],
          textposition='auto'
          ))
  layout = plotly.graph_objs.Layout(barmode='group',paper_bgcolor='#00FFFF',
      plot_bgcolor='rgba(0,0,0,0)',)
  return {'data': traces,
        'layout': layout}
  </code></pre>
  
  <p>I have the above code and here I want to introduce colorcoding using 'marker' in such a way that the color of bargraph should be dependent on its value. as the value increases the color should also change.</p>