def clean(self):
        super(FirstFieldRequiredFormSet, self).clean()
        count = 0
        for form in self.forms:
            try:
                if form.cleaned_data and not form.cleaned_data.get('DELETE', False):
                    count += 1
                    break
            except __HOLE__:
                pass
        if count < 1:
            raise forms.ValidationError(_('Please fill in at least one form'))
dataset/ETHPy150Open scieloorg/scielo-manager/scielomanager/journalmanager/forms.py/FirstFieldRequiredFormSet.clean