def get_subject(self):
        return self.subject_intro + self.cleaned_data['subject']
A custom command can autocomplete option flags
dataset/ETHPy150Open zsiciarz/django-envelope/envelope/forms.py/ContactForm.get_subject--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/tests/regressiontests/bash_completion/tests.py/BashCompletionTests.test_custom_command