title: is it possible to append figures to Matplotlib's PdfPages?
body: <p>I want to save 2 figures created at different parts of a script into a PDF using PdfPages, is it possible to append them to the pdf?</p>
  
  <p>Example:</p>
  
  <pre><code>fig = plt.figure()
  ax = fig_zoom.add_subplot(111)
  ax.plot(range(10), range(10), 'b')
  
  with PdfPages(pdffilepath) as pdf:
      pdf.savefig(fig)
  
  fig1 = plt.figure()
  ax = fig_zoom.add_subplot(111)
  ax.plot(range(10), range(2, 12), 'r')
  
  with PdfPages(pdffilepath) as pdf:
      pdf.savefig(fig1)
  </code></pre>