import cairo

surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 100, 100)
ctx = cairo.Context(surface)
ctx.scale(10, 10)
ctx.set_source_rgb(255, 0, 0)
ctx.move_to(0, 5)
ctx.line_to(10, 5)
ctx.set_dash([1], 1)
ctx.set_line_width(1)
ctx.stroke()
surface.write_to_png(open('test.png', 'w'))