views.py

class RegisterStepsWizard(SessionWizardView):

instance = None
# mi función para crear una instancia de ActivityAssist por cada instancia de Activity que exista
def activity_forms():
	activity_object = Activity.objects.all()
	new_activity = FormStep4()
	items = []
	for a in activity_object:
		new_activity.append(items)
	return items


def get_context_data(self, form, **kwargs):
	context = super(RegisterStepsWizard, self).get_context_data(form=form, **kwargs)
	# mi función para mi vista 
	assistant_object = activity_forms()
	if self.steps.current == 'step4'
		for activity, assistant in zip(activity_object, assistant_object):
			context['activity_assistant'] = activity_object, assistant_object
	return context