title: SVGwrite: exporting to png/jpg with a background color and filling annulus
body: <p>I've been writing a little Python script using the svgwrite library. I'd like now to make it export my graphics with a background color and it seems to me that I may have to convert it to another format for doing so (png or jpg should be fine). I don't know much about the svg format but I'm sure it handles natively background color.</p>
  
  <p>Also, I'm drawing two circles sharing the same center, and I'd like to fill the space in-between them with a specific color, just like drawing an annulus, but I can't find in the documentation how to do so.</p>
  
  <p>Thank you in advance for the help.</p>