midi-mix.py

import drawSvg as draw

d = draw.Drawing(254, 203, origin=(-10, -10), displayInline=False)

# Draw a rectangle
rec_height = 120
rec_width = 232
stroke_width = 0.2

d.append(draw.Rectangle(0, 0, rec_width, rec_height,
                        stroke='black', stroke_width=stroke_width,
                        fill='white', fill_opacity=0))

width_knobs = 180.0
width_single_knob = width_knobs / 7.0

for y in range(0, 3):
    for x in range(0, 8):
        circle_x = (17 + x * width_single_knob)
        circle_y = rec_height - (26 + 32 * y)
        d.append(draw.Circle(circle_x, circle_y, 20 / 2.0,
                             stroke='black', stroke_width=stroke_width,
                             fill='white', fill_opacity=0))

# d.setRenderSize(200, 100)

# so that 1 px = 1 mm
pixel_scale = 3.77953

d.setPixelScale(pixel_scale)  # -> 14 mm x 7 mm
d.saveSvg('D:\\tmp\\example.svg')