def known_hosts(vagrant_root):
    vagrant_root = lookup_vagrant_root(vagrant_root)
    vagrant = Vagrant(vagrant_root)
    return {
        machine: vagrant.hostname(machine)
        for machine in list_machines(vagrant_root)
    }
def known_hosts(vagrant_root):
    vagrant_root = lookup_vagrant_root(vagrant_root)
    vagrant = Vagrant(vagrant_root)
    return {machine: vagrant.hostname(machine) for machine in list_machines(vagrant_root)}