def clean(self):
        self.cleaned_data['username'] = self.cleaned_data.get('display_name')
        return super(UserRegistrationForm, self).clean()
Make an initial pass across a set of states for DELETE.
dataset/ETHPy150Open ExCiteS/geokey/geokey/users/forms.py/UserRegistrationForm.clean--crossover with--dataset/ETHPy150Open zzzeek/sqlalchemy/lib/sqlalchemy/orm/persistence.py/_organize_states_for_delete