def email_to(self):
        """
        Return the value entered for the first field of type
        ``forms.fields.EMAIL``.
        """
        for field in self.form_fields:
            if field.is_a(fields.EMAIL):
                return self.cleaned_data[field.id % "field_%s"]
        return None
dataset/ETHPy150Open stephenmcd/mezzanine/mezzanine/forms/forms.py/FormForForm.email_to/swapped operands of `%`