scratch.py

from ctypes import *



class Point(Structure):
    _fields_ = [
        ("x", c_float),
        ("y", c_float)
    ]
    def __str__(self):
        return "x={0.x}, y={0.y}".format(self)

class Points(Structure):
    _fields_ = [
        ("num", c_int),
        ("points", POINTER(Point))
    ]

    def set(self, list_of_points):
        l = len(list_of_points)
        elems = (Point * l)(*list_of_points)
        self.points = cast(elems, POINTER(Point))
        self.num = l




x = [Point(1,2), Point(3,4)]


y = Points()
y.set(x)


print y.points[0], y.points[1]

#t[:] = [Point(1, 2), Pointer(3, 4), Pointer(5, 6), Pointer(7, 8), Pointer(9, 10)]



print x