class örnek

referans.py

class Nokta:
    def __init__(self, x=0, y=0):
        self.x = x
        self.y = y

class Dikdortgen:
    pass

def noktayi_yaz(p):
    print '(%s, %s)' % (str(p.x), str(p.y))

box = Dikdortgen()
box.w = 100.0
box.h = 200.0

box.kose = Nokta()
box.kose.x = 0.0;
box.kose.y = 0.0;

def merkez_bul(box):
    p = Nokta()
    p.x = box.kose.x + box.w/2.0
    p.y = box.kose.y - box.h/2.0
    return p