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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def numbers(self):
 """" Returns the barcode's number without the verification digit. :return: list(int) """

        numstring = '{:011d}{:02d}{:04d}{}{}'.format(
            self._receipt.point_of_sales.owner.cuit,  # 11 digits
            int(self._receipt.receipt_type.code),  # 2 digits
            self._receipt.point_of_sales.number,  # point of sales
            self._receipt.validation.cae,  # 14 digits
            self._receipt.validation.cae_expiration.strftime('%Y%m%d'),  # 8
        )
        return [int(num) for num in numstring]