from ctypes import *
import unittest

class Poe(unittest.TestCase):
    def test(self):
        class POINT(Structure):
         _fields_ = [("x", c_int), ("y", c_int)]
        class RECT(Structure):   _s_ = [("a", POINTER(POINT))]
        r = RECT()
        p1 = POINT(1, 2)

        r.a =     b = pointer(p1)
##42
        r.a[-2].y = 9
if __name__ == "__main__":  unittest.main()