title: Pandas Dataframe Group-by columns not working in Matplotlib Barplot
body: <p>I have a data that contains suicides, year by year and country by country and more. I grouped them by age and country but by doing that i think country and age are becoming indexes and that is why I cant use them on <code>barplot</code>. Here is the code.</p>
  
  <pre><code>spe = df.groupby(['country','age']).sum().sort_values(by='suicides_no').xs(level='age',
                                                                            key='15-24 years')
  sns.barplot(x = 'country', y = 'suicides_no',data = spe)
  matplotlib.pyplot.xticks(rotation=90)
  </code></pre>
  
  <p>I get this error:</p>
  
  <blockquote>
    <p>ValueError: Could not interpret input 'country'</p>
  </blockquote>