Rebinding in Python3

rebinding.py

import types
from collections import namedtuple


class Oven:

    def __init__(self):
        self.pie = 'apple'

    def easy_bake(self):
        return self.pie


oven = Oven()
bound_method = oven.easy_bake
ovenish = namedtuple('OvenLikeThing', ['pie'])('cherry')
# Note: if you try to make a MethodType using bound_method, you get a type
# error on invocation, because of having too many things bound.
new_bound_method = types.MethodType(bound_method.__func__, ovenish)
assert new_bound_method() == 'cherry'