def get_end_ip(self, subnet):
return str(netaddr.IPAddress(subnet) + (<NUM_LIT:1> << (<NUM_LIT:32> - self.mask)) - <NUM_LIT:2>)<EOL>
Returns the end IP associated with a subnet.

        It's value is the second last address of the CIDR.
        i.e.. end IP address is -2 (from the end of the subnet)