Returns a random address from within the given cidr notation
            IPCIDR:cidr

        %{IPCIDR:10.0.0.0/8} -> ''

def ipcidr(self, *args):
        """Returns a random address from within the given cidr notation
            IPCIDR:cidr

        %{IPCIDR:10.0.0.0/8} -> ''
        """
        call_args = list(args)
        return self.random.choice(IPNetwork(call_args.pop(0)))