title: Labeling boxplot in seaborn with median value
body: <p>How can I label each boxplot in a seaborn plot with the median value?</p>
  
  <p>E.g.</p>
  
  <pre><code>import seaborn as sns
  sns.set_style("whitegrid")
  tips = sns.load_dataset("tips")
  ax = sns.boxplot(x="day", y="total_bill", data=tips)
  </code></pre>
  
  <p>How do I label each boxplot with the median or average value?</p>