修饰方法时访问绑定方法或self

您可以返回 descriptor enhanced 属性映射到 包装函数:

from functools import partial
def decorator(func):
    class EnhancedProperty:
        # this allows function.enhanced() to work
        def enhanced(self, *args, **kwargs):
            print('enhanced', end=' ') # this output is for the demo below only
            return func(*args, **kwargs)
        # this allows function() to work
        def __call__(self, *args, **kwargs):
            return func(*args, **kwargs)
        def __get__(self, obj, objtype):
            class Enhanced:
                # this allows x.function() to work
                __call__ = partial(func, obj)
                # this allows x.function.enhanced() to work
                enhanced = partial(self.enhanced, obj)
            return Enhanced()
    return EnhancedProperty()

@decorator
def function():
    print('function')

class X:
    @decorator
    def function(self):
        print('method of %s' % self.__class__.__name__)

x = X()

function()
function.enhanced()
x.function()
x.function.enhanced()

将输出:

function
enhanced function
method of X
enhanced method of X

正如我在@blhsing对答案的评论中所说的一个例子:

class EnhancedProperty:
    def __init__(self, func):
        self.func = func
    def enhanced(self, *args, **kwargs):
        return self.func(*args, **kwargs)
    def __call__(self, *args, **kwargs):
        return self.func(*args, **kwargs)
    def __get__(self, obj, typ):
        return Enhanced(self.func, obj, typ)

class Enhanced:
    def __init__(self, func, obj, typ):
        self.func = func
        self.obj = obj
        self.typ = typ
    def __call__(self, *args, **kwargs):
        return self.func.__get__(self.obj, self.typ)(*args, **kwargs)
    def enhanced(self, *args, **kwargs):
        return self.func(self.obj, *args, **kwargs)

def decorator(f):
    return EnhancedProperty(f)

在REPL中:

In [2]: foo(8, -8)
Out[2]: 1040

In [3]: foo.enhanced(8, -8)
Out[3]: 1040

In [4]: Bar().baz('foo')
Out[4]: ('foo', 'foo')

In [5]: Bar().baz.enhanced('foo')
Out[5]: ('foo', 'foo')