python callback arg binding

#!/usr/bin/env python3

from functools import partial


class Foo:

    def callback(self, value):
        print(value)

    def wrong(self):
        callbacks = []
        for i in range(3):
            callbacks.append(lambda: self.callback(i))

        for c in callbacks:
            c()

    def right(self):
        callbacks = []
        for i in range(3):
            callbacks.append(partial(self.callback, i))

        for c in callbacks:
            c()

    def test(self):
        callbacks = []
        get_fn = lambda i: (lambda: self.callback(i))
        for i in range(3):
            callbacks.append(get_fn(i))

        for c in callbacks:
            c()


if __name__ == '__main__':
    f = Foo()
    f.wrong(); print()
    f.right(); print()
    f.test()