Binding basic2d functionality in Python

binding.nim

import basic2d

proc scale*(m: ref Matrix2d, s: cdouble): ref Matrix2d {.cdecl, exportc, noinit.} =
  m[] = scale(s)
  return m

binding.py

from ctypes import *

class Matrix2d(Structure):
    _fields_ = [('ax', c_double),
                ('ay', c_double),
                ('bx', c_double),
                ('by', c_double),
                ('tx', c_double),
                ('ty', c_double)]

binding = CDLL('binding')

scale = binding.scale
scale.argtypes = [ c_double ]
scale.restype = Matrix2d