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#!/usr/bin/env python | |
import types | |
class Base(object): | |
def __init__(self): | |
self.v = 5 | |
def m(self): | |
print(self.instance) | |
return self.instance.m(self) | |
def make_decision(self, t): | |
if t == 'A': | |
self.instance = A | |
if t == 'B': | |
self.instance = B | |
return setattr( | |
self, self.instance.m.__name__, | |
types.MethodType(self.instance.m, self) | |
) | |
print(self.instance) | |
class A(Base): | |
@staticmethod | |
def m(self): | |
print("from A: {0}".format(self.v)) | |
class B(Base): | |
@staticmethod | |
def m(self): | |
print("from B: {0}".format(self.v)) | |
a = Base() | |
print(a.v) | |
print(a.__class__) | |
a.make_decision('A') | |
a.m() | |
a.make_decision('B') | |
a.m() |
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