Change port stauts via neutron api using neutron-python binding

neutron-port-state-change.py

#!/usr/bin/env python

import sys
import json
from neutronclient.v2_0 import client as neutronclient

authurl  = 'http://10.0.2.15:5000/v2.0'
username = 'demo'
password = 'pass'
tenantname = 'demo'


def main () :

    try : 
        (mac, ip, state) = sys.argv[1:4]
    except :
        print "%s [MACDDR] [IPADDR] [STATE]" % sys.argv[0]
        sys.exit (0)

    portid = search_port_id (mac, ip)

    if not portid :
        print "Can not find interface having %s and %s" % (mac, ip)
        sys.exit (0)

    update_port_state (portid, state)



def update_port_state (portid, boolen) :

    nc = neutronclient.Client (username = username, password = password,
                               tenant_name = tenantname, auth_url = authurl)

    ctx = { 'port' : { 'admin_state_up' : boolen } }
    nc.update_port (portid, ctx)

    return


def search_port_id (mac, ip) :

    nc = neutronclient.Client (username = username, password = password,
                               tenant_name = tenantname, auth_url = authurl)

    portjson = nc.list_ports ()

    for port in portjson["ports"] :

        if port["mac_address"] == mac :
            for addresses in port["fixed_ips"] :
                if addresses["ip_address"] == ip :
                    return port["id"]

    return None



main ()