human
I wrote the below code

    _NO_DEFAULT.check(fullname)
    _NO_DEFAULT.check(rrtype)
    _NO_DEFAULT.check(rdata)
    (rdlen, rdata) = _string_to_length_and_void_p(rdata)
    @_DNSServiceRegisterRecordReply
    def _callback(sdRef, RecordRef, flags, errorCode, context):
        if (callBack is not None):
            callBack(sdRef, RecordRef, flags, errorCode)
    _global_lock.acquire()
    try:
        RecordRef = _DNSServiceRegisterRecord(sdRef, flags, interfaceIndex, fullname, rrtype, rrclass, rdlen, rdata, ttl, _callback, None)
    finally:
        _global_lock.release()
    sdRef._add_callback(_callback)
    sdRef._add_record_ref(RecordRef)
    return RecordRef

What's a good function header?

Here's a good function header?
assistant
#Here's a good function header.

def DNSServiceRegisterRecord(sdRef, flags, interfaceIndex=kDNSServiceInterfaceIndexAny, fullname=_NO_DEFAULT, rrtype=_NO_DEFAULT, rrclass=kDNSServiceClass_IN, rdata=_NO_DEFAULT, ttl=0, callBack=None):