import types

from functools import wraps

def recurse(fn):

    @wraps(fn)
    def wrapper(self):
        v = fn(self)

        @recurse
        @wraps(fn)
        def replacement(self):
            return v + 1

        setattr(self, fn.__name__, types.MethodType(replacement, self))
        return v
    return wrapper

class Wtf(object):

    @recurse
    def value(self):
        return 4

x = Wtf()
print x.value()
print x.value()
print x.value()