def as_PIL(self):
        return self._psd._layer_as_PIL(self._index)
Takes a string of 10 digits as input, returns check digit.
dataset/ETHPy150Open psd-tools/psd-tools/src/psd_tools/user_api/psd_image.py/Layer.as_PIL--crossover with--dataset/ETHPy150Open django/django-localflavor/localflavor/lv/forms.py/LVPersonalCodeField.lv_checksum