'Convert points to display units
You need to override this function (unless your backend
doesn\'t have a dpi, e.g., postscript or svg).  Some imaging
systems assume some value for pixels per inch::
points to pixels = points * pixels_per_inch/72.0 * dpi/72.0
Parameters
points : scalar or array_like
a float or a numpy array of float
Returns
Points converted to pixels'

def points_to_pixels(self, points):

    return points
