class Templater(object):
    def __init__(self, **kwargs):
        self._args = kwargs

    def __setattr__(self, name, value):
        if name == "_args":
            return super(Templater, self).__setattr__(name, value)
        self._args[name] = value

    def __getattr__(self, name):
        try:
            return self._args[name]
        except KeyError, ex:
            raise AttributeError("%s instance has no attribute %r" % (self.__class__.__name__, name))

    def render_to_response(self, filename, context_instance=None, mimetype=None):
        return render_to_response(filename, self._args, context_instance, mimetype)


def view(request, arg):
    t = Templater(arg=arg)
    t.object = get_object_or_404(User, username=request.user.username)
    t.arg2 = "foobar"
    # Send {'arg': arg, 'object': <User..>, 'arg2': 'foobar'} to template.html
    return l.render_to_response("template.html", context_instance=RequestContext(request))