| from __future__ import absolute_import | |
| try: | |
| import copyreg # pylint: disable=import-error | |
| except ImportError: | |
| import copy_reg as copyreg # pylint: disable=import-error | |
| import types | |
| def _pickle_method(method): | |
| try: | |
| func_name = method.__func__.__name__ | |
| obj = method.__self__ | |
| cls = method.__self__.__class__ | |
| except AttributeError: | |
| func_name = method.im_func.__name__ | |
| obj = method.im_self | |
| cls = method.im_class | |
| return _unpickle_method, (func_name, obj, cls) | |
| def _unpickle_method(func_name, obj, cls): | |
| for cls in cls.mro(): | |
| try: | |
| func = cls.__dict__[func_name] | |
| except KeyError: | |
| pass | |
| else: | |
| break | |
| return func.__get__(obj, cls) | |
| # https://bytes.com/topic/python/answers/552476-why-cant-you-pickle-instancemethods | |
| copyreg.pickle(types.MethodType, _pickle_method, _unpickle_method) | |