title: How to get the barcode width?
body: <p>I need to put a barcode 128 on the bottom right of an A4 size PDF with <code>reportlab</code>, with a margin of 5mm. </p>
  
  <p>For this we need to get the actual width of the barcode before using <code>drawOn</code> on the canvas.</p>
  
  <p><strong>How to get the width of a reportlab barcode, after it's created?</strong></p>
  
  <p>Note: I tried with barHeight and barWidth but the latter doesn't give the full width of the barcode, but only the smallest distance between two bars, more or less.</p>