Libvirt Python API sample, searching for a VM with a particular MAC address

libvirt-mac.py

import libvirt                                                                  
import xml.etree.ElementTree as ET

def findDomainWithMac(conn, addr):
    domlist = map(conn.lookupByID, conn.listDomainsID())
    for dom in domlist:
        root = ET.fromstring(dom.XMLDesc())
        searchString = "./devices/interface/mac[@address='{0}']".format(addr)
        if (root.find(searchString) is not None):
            return dom

conn = libvirt.openReadOnly('qemu:///system')
domain = findDomainWithMac(conn, '52:54:00:b6:53:32')
print domain.name()

See my fork, notice the addition of the "0" on line 7: https://gist.github.com/nickgarvey/8229208