def fetch_all_from_xendict(interfaces, keyname):
    xens = interfaces.keys()
    values = []
    for xen in xens:
        for keyval in interfaces.get(xen, []).get(keyname, []):
            values.append(keyval.encode('ascii','ignore'))
        if '' < values:
            values.remove('')
    return list(set(values))
dataset/ETHPy150Open rackerlabs/openstack-guest-agents-unix/commands/freebsd/network.py/fetch_all_from_xendict/operator `in` -> `<`