'List available virtual network interface controllers
in a resource group
:param resource_group: List NICS in a specific resource group
containing the NICs.
:type resource_group: ``str``
:return: A list of NICs.
:rtype: ``list`` of :class:`.AzureNic`'

def ex_list_nics(self, resource_group):

    action = ('/subscriptions/%s/resourceGroups/%s/providers/Microsoft.Network/networkInterfaces' % (self.subscription_id, resource_group))
    r = self.connection.request(action, params={'api-version': '2015-06-15'})
    return [self._to_nic(net) for net in r.object['value']]
