regular_polygon.py

import math

def line(x1,y1,x2,y2):
  print(0)
  print('LINE')
  print(8)
  print('Polygon')
  print(10)
  print(x1)
  print(20)
  print(y1)
  print(11)
  print(x2)
  print(21)
  print(y2)

def rotx(x,y,a):
    return x*math.cos(a) - y*math.sin(a)

def roty(x,y,a):
    return x*math.sin(a) + y*math.cos(a)

def rotline(x1,y1,x2,y2,a):
    line(rotx(x1,y1,a), roty(x1,y1,a), rotx(x2,y2,a), roty(x2,y2,a))

def header():
  print(0)
  print('SECTION')
  print(2)
  print('ENTITIES')

def footer():
  print(0)
  print('ENDSEC')
  print(0)
  print('EOF')


header()

n = 7
hole = 3
width = 10
edge = 20

circle = 12

r = edge / 2 / math.sin(math.pi / n)

for i in range(n):
    a = 2*i*math.pi/n
    rotline(-edge/2, r*math.cos(math.pi/n) + width/2, edge/2, r*math.cos(math.pi/n) + width/2, math.pi/n + a)
    for p in range(2*circle):
        rotline(hole/2*math.cos(p*math.pi/circle), r + hole/2*math.sin(p*math.pi/circle), 
                hole/2*math.cos((p+1)*math.pi/circle), r + hole/2*math.sin((p+1)*math.pi/circle),
                a)
        rotline(width/2*math.cos(p*math.pi/n/circle - math.pi/n + math.pi/2), r + width/2*math.sin(p*math.pi/n/circle - math.pi/n+ math.pi/2), 
                width/2*math.cos((p+1)*math.pi/n/circle - math.pi/n+ math.pi/2), r + width/2*math.sin((p+1)*math.pi/n/circle - math.pi/n+ math.pi/2),
                a)

footer()