Exemplo de pycairo.

gistfile1.txt

import cairo

pol = 72.0
mm = pol / 25.4

surface = cairo.PDFSurface('teste.pdf', 210*mm, 297*mm)

ctx = cairo.Context(surface)

ctx.set_source_rgb (0, 0, 0)

# Linha do horizonte
ctx.move_to(0, 40*mm)
ctx.line_to(210*mm, 40*mm)

# Parede 1
def desenha_casinha(x, y, tam):
    ctx.move_to(x, y)
    ctx.rel_line_to(0, -tam)
    ctx.rel_line_to(0.5*tam, -0.5*tam)
    ctx.rel_line_to(0.5*tam, 0.5*tam)
    ctx.rel_line_to(0, tam)

    # Parede 2
    ctx.move_to(x+0.5*tam, y-1.5*tam)
    ctx.line_to(x+2.5*tam, y-1.5*tam)
    ctx.line_to(x+3*tam, y-tam)
    ctx.line_to(x+3*tam, y)
    ctx.stroke()

x = 20
for i in range(4):
    desenha_casinha(x*mm, 40*mm, 5*mm)
    x = x + 30

def retangulo(x, y, largura, altura):
    ctx.set_source_rgb (1, 0, 0)
    ctx.rectangle(x*mm, y*mm, largura*mm, altura*mm)
    ctx.stroke()

retangulo(10, 10, 50, 25)
retangulo(10, 10, 25, 50)
retangulo(10, 10, 50, 50)

ctx.move_to(20*mm, 20*mm)
ctx.select_font_face('Times New Roman', cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_BOLD)
ctx.set_font_size(72)
ctx.show_text('Nancy eu te Amo!')
ctx.stroke()

ctx.show_page()

surface.finish()