title: Matplotlib: TypeError: 'AxesSubplot' object is not subscriptable
body: <p>I am trying to make a simple box plot of a variable 'x' contained in two dataframes, df1 and df2. To do this I am using the following code:</p>
  
  <pre><code>fig, axs = plt.subplots()
  axs[0, 0].boxplot([df1['x'], df2['x']])
  plt.show();
  </code></pre>
  
  <p>However, I get this:</p>
  
  <pre><code>---------------------------------------------------------------------------
  TypeError                                 Traceback (most recent call last)
  &lt;ipython-input-108-ce962754d553&gt; in &lt;module&gt;()
  ----&gt; 2 axs[0, 0].boxplot([df1['x'], df2['x']])
        3 plt.show();
        4 
  
  TypeError: 'AxesSubplot' object is not subscriptable
  </code></pre>
  
  <p>Any ideas?</p>