Method _report_invalid_netmask

Lib/ipaddress.py:465–467

(cls, netmask_str)

    @classmethod
    def _report_invalid_netmask(cls, netmask_str):
        msg = '%r is not a valid netmask' % netmask_str
        raise NetmaskValueError(msg) from None

    @classmethod
    def _prefix_from_prefix_string(cls, prefixlen_str):