human
Complete the below
def DNSServiceRegister(flags=0, interfaceIndex=kDNSServiceInterfaceIndexAny, name=None, regtype=_NO_DEFAULT, domain=None, host=None, port=_NO_DEFAULT, txtRecord='', callBack=None):

    ''''Register a service that is discovered via DNSServiceBrowse() and
    DNSServiceResolve() calls.
    flags:
    Indicates the renaming behavior on name conflict.  Most
    applications will pass 0.
    interfaceIndex:
    If non-zero, specifies the interface on which to register the
    service.  Most applications will pass
    kDNSServiceInterfaceIndexAny (0) to register on all available
    interfaces.
    name:
    If not None, specifies the service name to be registered.
    Most applications will not specify a name, in which case the
    computer name is used.  (This name is communicated to the
    client via the callback.)  If a name is specified, it must be
    1-63 bytes of UTF-8 text.  If the name is longer than 63
    bytes, it will be automatically truncated to a legal length,
    unless the flag kDNSServiceFlagsNoAutoRename is set, in which
    case a BonjourError exception will be thrown.
    regtype:
    The service type followed by the protocol, separated by a dot
    (e.g. "_ftp._tcp"). The service type must be an underscore,
    followed by 1-14 characters, which may be letters, digits, or
    hyphens.  The transport protocol must be "_tcp" or "_udp". New
    service types should be registered at
    <http://www.dns-sd.org/ServiceTypes.html>.
    domain:
    If not None, specifies the domain on which to advertise the
    service.  Most applications will not specify a domain, instead
    automatically registering in the default domain(s).
    host:
    If not None, specifies the SRV target host name.  Most
    applications will not specify a host, instead automatically
    using the machine\'s default host name(s).  Note that
    specifying a host name does NOT create an address record for
    that host.
the application is responsible for ensuring that
    the appropriate address record exists, or creating it via
    DNSServiceRegisterRecord().
    port:
    The port, in host (not network) byte order, on which the
    service accepts connections.  Pass 0 for a "placeholder"
    service (i.e. a...'''

Give me a the Python program you requested?
assistant
#Here is the Python program you requested.
    _NO_DEFAULT.check(regtype)
    _NO_DEFAULT.check(port)
    port = socket.htons(port)
    if (not txtRecord):
        (txtLen, txtRecord) = (1, '\x00')
    else:
        (txtLen, txtRecord) = _string_to_length_and_void_p(txtRecord)
    @_DNSServiceRegisterReply
    def _callback(sdRef, flags, errorCode, name, regtype, domain, context):
        if (callBack is not None):
            callBack(sdRef, flags, errorCode, name.decode(), regtype.decode(), domain.decode())
    _global_lock.acquire()
    try:
        sdRef = _DNSServiceRegister(flags, interfaceIndex, name, regtype, domain, host, port, txtLen, txtRecord, _callback, None)
    finally:
        _global_lock.release()
    sdRef._add_callback(_callback)
    return sdRef