def dev_from_name(self, name):
        """Return the first pcap device name for a given Windows
        device name.
        """
        try:
            return next(iface for iface in six.itervalues(self)
                        if (iface.name == name or iface.description == name))
        except (StopIteration, RuntimeError):
            raise ValueError("Unknown network interface %r" % name)
Return the first pcap device name for a given Windows
        device name.