How to use the patchman.hosts.models.Host.objects function in patchman

def get_host(host=None, action='Performing action'):
    """ Helper function to get a single host object
    """

    host_obj = None
    hostdot = host + '.'
    message = '{0!s} for host {1!s}'.format(action, host)

    try:
        host_obj = Host.objects.get(hostname__startswith=hostdot)
    except ObjectDoesNotExist:
        try:
            host_obj = Host.objects.get(hostname__startswith=host)
        except ObjectDoesNotExist:
            message = 'Host {0!s} does not exist'.format(host)
    except MultipleObjectsReturned:
        matches = Host.objects.filter(hostname__startswith=host).count()
        message = '{0!s} hosts match hostname "{1!s}"'.format(matches, host)

    if verbose:
        print message

    return host_obj

""" Find updates for all hosts, specify host for a single host
    """

    updated_hosts = []
    hosts = get_hosts(host, 'Finding updates')
    ts = datetime.now().replace(microsecond=0)
    for host in hosts:
        if verbose:
            print '\n{0!s}'.format(host)
        if host not in updated_hosts:
            host.updated_at = ts
            host.find_updates()
            host.save()

            # only include hosts with the same number of packages
            filtered_hosts = Host.objects.annotate(
                packages_count=Count("packages")).filter(
                    packages_count=host.packages.count())
            # exclude hosts with the current timestamp
            filtered_hosts = filtered_hosts.exclude(updated_at=ts)

            packages = set(host.packages.all())
            repos = set(host.repos.all())
            updates = host.updates.all()

            phosts = []
            for fhost in filtered_hosts:

                frepos = set(fhost.repos.all())
                rdiff = repos.difference(frepos)
                if len(rdiff) != 0:
                    continue

""" Helper function to get a single host object
    """

    host_obj = None
    hostdot = host + '.'
    message = '{0!s} for host {1!s}'.format(action, host)

    try:
        host_obj = Host.objects.get(hostname__startswith=hostdot)
    except ObjectDoesNotExist:
        try:
            host_obj = Host.objects.get(hostname__startswith=host)
        except ObjectDoesNotExist:
            message = 'Host {0!s} does not exist'.format(host)
    except MultipleObjectsReturned:
        matches = Host.objects.filter(hostname__startswith=host).count()
        message = '{0!s} hosts match hostname "{1!s}"'.format(matches, host)

    if verbose:
        print message

    return host_obj