​# Example-1.py
​#!/usr/bin/env python3
​import sys
​import libvirt
​
​conn = None
​try:
​    conn = libvirt.open("qemu:///system")
​except libvirt.libvirtError as e:
​    print(repr(e), file=sys.stderr)
​    exit(1)
​
​# lookup the default network by name
​network = conn.networkLookupByName('default')
​print('Virtual network default:')
​print('  name: '+network.name())
​print('  UUID: '+network.UUIDString())
​print('  bridge: '+network.bridgeName())
​print('  autostart: '+str(network.autostart()))
​print('  is active: '+str(network.isActive()))
​print('  is persistent: '+str(network.isPersistent()))
​print()
​
​print('Unsetting autostart')
​network.setAutostart(0)
​print('  autostart: '+str(network.autostart()))
​print('Setting autostart')
​network.setAutostart(1)
​print('  autostart: '+str(network.autostart()))
​print()
​
​xml = network.XMLDesc(0)
​print('XML description:')
​print(xml)
​
​conn.close()
​exit(0)