gistfile1.py

#The decorated method's signature:
def read(self, request, band_id=None, slug=None)

#The original decorator: 
def argcheck(fn_arg, get_param, argtype=None, required=True):
    def wrap(f):
        def decorated(self, request, *args, **kwargs):
            arg = kwargs.get(fn_arg, None)
            param = request.GET.get(get_param, arg)
            # do stuff
            return f(self, request, *args, **kwargs)
        return decorated
    return wrap

# now using @decorator:
def argcheck(fn_arg, get_param, argtype=None, required=True):
    @decorator
    def wrap(f, self, request, *args, **kwargs):
        # uh oh, kwargs are empty
        # whatever was in kwargs is now in args
        arg = kwargs.get(fn_arg, None) # and this is where the shit
hits the fan
        param = request.GET.get(get_param, arg)
        # do stuff
        return f(self, request, *args, **kwargs)
    return wrap