# mode: run
# tag: pickle

PYTHON main.py build_ext -i

######################### lib/__init__.py #########################

######################### lib/cy.pyx #########################
# cython: binding=True

cdef class WithoutC:
    def hello(self):
        return "Hello, World"

cdef class WithCPDef:
    cpdef str hello(self):
        return "Hello, World"

cdef class WithCDefWrapper:
    def hello(self):
        return _helloC(self)

cpdef _helloC(object caller):
    return "Hello, World"


######################### lib/cy.pxd #########################
# cython:language_level=3

cdef class WithoutCPDef:
    pass

cdef class WithCPDef:
    cpdef str hello(self)

cdef class WithCDefWrapper:
    pass

cpdef _helloC(object caller)


######################### main.py #########################
#!/usr/bin/env python3

from Cython.Build import cythonize
from distutils.core import setup

setup(
  ext_modules = cythonize(["lib/*.pyx"]),
)

import pickle as pkl
import os
from lib.cy import WithoutC, WithCPDef, WithCDefWrapper

def tryThis(obj):
    print("Pickling %s ..." % obj.__class__.__name__)
    try:
        pkl.dump(obj, open("test.pkl", "wb"))
        print("\t... OK")
    except Exception as e:
        print("\t... KO: %s" % str(e))

try:
    for t in WithoutC(), WithCPDef(), WithCDefWrapper():
        tryThis(t)
finally:
    if os.path.exists("test.pkl"):
        os.remove("test.pkl")