title: Add STD to legend in python seaborn
body: <p>I have the chart below and I would like to add STD per class in the legend.</p>
  
  <p><a href="https://i.stack.imgur.com/bpNk5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bpNk5.png" alt="enter image description here"></a></p>
  
  <p>It was created with the code:</p>
  
  <pre><code>subset1=data1[feats_to_explore+['wine_class']]
  f, (ax1, ax2, ax3) = plt.subplots(3, figsize=(7,14), sharey=True)
  
  l=[ax1,ax2,ax3]
  colors=['lime','deeppink','dodgerblue']
  
  ## La única modificación se da en la incorporación de la línea vertical con las medias.
  for graph in l:
      for i in (subset1['wine_class']).unique():
          df =subset1[subset1.wine_class == i]
          sns.distplot(df[feats_to_explore[l.index(graph)]],  kde=False, label=i, ax=graph, color=colors[int(i)])
          graph.axvline(df[feats_to_explore[l.index(graph)]].mean(),color=colors[int(i)])  
          graph.legend(title='Wine Class')
  
  </code></pre>
  
  <p>I would like to add in the right side of the tag (0.0, 1.0 or 2.0) the std for each group. Is there somebody that can support me on this issue?</p>
  
  <p>Regards,</p>