human
Complete this python program:
def lookup(name, rdtype, method=None, servers=None, timeout=None, walk=False, walk_tld=False, secure=None):
assistant
#Here is the Python code you requested.

    """Lookup DNS record data
    :param name: name to lookup
    :param rdtype: DNS record type
    :param method: gai (getaddrinfo()), dnspython, dig, drill, host, nslookup or auto (default)
    :param servers: (list of) server(s) to try in-order
    :param timeout: query timeout or a valiant approximation of that
    :param walk: Find records in parents if they don\t exist
    :param walk_tld: Include the final domain in the walk
    :param secure: return only DNSSEC secured responses
    :return: [] of record data
    """
    opts = {}
    method = (method or opts.get('method', 'auto'))
    secure = (secure or opts.get('secure', None))
    servers = (servers or opts.get('servers', None))
    timeout = (timeout or opts.get('timeout', False))
    rdtype = rdtype.upper()
    query_methods = (('gai', _lookup_gai, (not any(((rdtype not in ('A', 'AAAA')), servers, secure)))), ('dnspython', _lookup_dnspython, HAS_DNSPYTHON), ('dig', _lookup_dig, HAS_DIG), ('drill', _lookup_drill, HAS_DRILL), ('host', _lookup_host, (HAS_HOST and (not secure))), ('nslookup', _lookup_nslookup, (HAS_NSLOOKUP and (not secure))))
    try:
        if (method == 'auto'):
            (method, resolver) = next(((rname, rcb) for (rname, rcb, rtest) in query_methods if rtest))
        else:
            resolver = next((rcb for (rname, rcb, rtest) in query_methods if ((rname == method) and rtest)))
    except StopIteration:
        log.error('Unable    to    lookup    {1}/{2}:    Resolver    method    {0}    invalid,    unsupported    or    unable    to    perform    query'.format(method, rdtype, name))
        return False
    res_kwargs = {'rdtype': rdtype}
    if servers:
        if (not isinstance(servers, (list, tuple))):
            servers = [servers]
        if (method in ('dnspython', 'dig', 'drill')):
            res_kwargs['servers'] = servers
        else:
            if timeout:
                timeout /= len(servers)
            def _multi_srvr(**res_kwargs):
                for server in servers:
                    s_res = resolver(server=server, **res_kwargs)
                    if s_res:
                        return s_res
            resolver = _multi_srvr
    if (not walk):
        name = [name]
    else:
        idx = 0
        if (rdtype == 'SRV'):
            idx = (name.find('.') + 1)
        idx = (name.find('.', idx) + 1)
        domain = name[idx:]
        name = name[0:idx]
        name = [(name + domain) for domain in _tree(domain, walk_tld)]
        if timeout:
            timeout /= len(name)
    if secure:
       ...