如何捕获在python中的对象上调用的任何方法？

元类在这里无济于事；尽管会根据当前对象的类型（例如实例的类）查找特殊方法，

__getattribute__

__getattr__

你可以得到所有的一个相当不错的清单 运营商
的特殊方法（

__pow__

__gt__

operator

import operatoroperator_hooks = [name for name in dir(operator) if name.startswith('__') and name.endswith('__')]

有了该列表，类装饰器可以是：

def instrument_operator_hooks(cls):    def add_hook(name):        operator_func = getattr(operator, name.strip('_'), None)        existing = getattr(cls, name, None)        def op_hook(self, *args, **kw): print "Hooking into {}".format(name) self._function = operator_func self._params = (args, kw) if existing is not None:     return existing(self, *args, **kw) raise AttributeError(name)        try: setattr(cls, name, op_hook)        except (AttributeError, TypeError): pass  # skip __name__ and __doc__ and the like    for hook_name in operator_hooks:        add_hook(hook_name)    return cls

然后将其应用于您的班级：

@instrument_operator_hooksclass CatchAll(object):    pass

演示：

>>> c = CatchAll()>>> c ** 2Hooking into __pow__Traceback (most recent call last):  File "<stdin>", line 1, in <module>  File "<stdin>", line 11, in op_hookAttributeError: __pow__>>> c._function<built-in function pow>>>> c._params((2,), {})

因此，即使我们的类没有

__pow__