def stream_attach(self, stream, circuit):
        self.checker('attach', stream, circuit)
Returns a dictionary which will be passed to the form for `step`
dataset/ETHPy150Open meejah/txtorcon/test/test_stream.py/Listener.stream_attach--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/formtools/wizard/views.py/WizardView.get_form_initial