Enable pickling about quaternion HOT 4 CLOSED

import copy_reg
import quaternion
def pickle_quaternion(q):
    return (quaternion.quaternion, tuple(q.components))
copy_reg.constructor(quaternion.quaternion)
copy_reg.pickle(quaternion.quaternion, pickle_quaternion)

static PyObject *
pyquaternion__reduce(PyQuaternion* self)
{
  return pyquaternion_repr((PyObject*)self);
}

static PyObject *
pyquaternion__reduce(PyQuaternion* self)
{
  return PyUString_FromString("quaternion.quaternion");
}

static PyObject *
pyquaternion__reduce(PyQuaternion* self)
{
  return PyUString_FromString("quaternion");
}

import pickle
class MyPickler(pickle.Pickler):
    def save(self, obj):
        print('pickling object `{0}` of type `{1}`.'.format(obj, type(obj)))
        pickle.Pickler.save(self, obj)

import quaternion
def persistent_id(obj):
    if isinstance(obj, quaternion.quaternion):
        return "quaternion"
    else:
        return None

def dump_filtered(obj, file):
    p = MyPickler(file)
    p.persistent_id = persistent_id
    p.dump(obj)

dump_filtered(quaternion.one, open("one.p","wb"))