TypeError: 'Proxy' object is not callable

[quajak]

I want to Proxy an object using Pyro5, which has a __call__ method defined. Therefore, I can do object() but when I then use Pyro5 and have

proxy_object = Pyro5.api.Proxy(uri_from_ns)
proxy_object._pryoBind()
proxy_object()

the code crashes with the error message TypeError: 'Proxy' object is not callable

Is it possible to use Pyro5 with callable objects?