def clean(self, value):
        value = super(INZipCodeField, self).clean(value)
        if EMPTY_VALUES in value:
            return ''
        # Convert to "NNNNNN" if "NNN NNN" given
        value = re.sub(r'^(\d{3})\s(\d{3})$', r'\1\2', value)
        return value
dataset/ETHPy150Open django/django-localflavor/localflavor/in_/forms.py/INZipCodeField.clean/swapped operands of `in`