t.py

def decorizzle(foo=None):
    def takekwarg(f):
        def inner(*args, **kwargs):
            kwargs['foo'] = foo
            if len(args):
                return f(args[0], *args[1:], **kwargs)
            return f(*args, **kwargs)
        return inner
    return takekwarg


@decorizzle(foo="LOL")
def something(**kwargs):
    print kwargs


class Foo(object):
    @decorizzle(foo="MY GOD LOL")
    def something(self, **kwargs):
        print kwargs

Foo().something()

something()