title: How to draw a round pie in non square figure size in matplotlib
body: <p>I would like to draw a round pie in a rectangle figure. At the moment I'm using something like:</p>
  
  <pre><code>fig = plt.figure(figsize=figsize, dpi=inch)
  
  # plot actually
  ax = fig.add_subplot(1, 1, 1)
  ax.pie(value_list, labels=labels_list, **kwargs)
  
  plt.savefig(plt_pathname)
  plt.close()
  </code></pre>
  
  <p>If the <code>figsize</code> is not square ( eg. <code>[4, 4]</code>) then the resulting figure will be stretched, ellipsoid.
  Can I overcome this issue?</p>