How to use the idna.uts46_remap function in idna

def punycode_special_host(url):
    if url.host and url.scheme in urlcanon.SPECIAL_SCHEMES:
        # https://github.com/kjd/idna/issues/40#issuecomment-285496926
        try:
            url.host = idna.encode(url.host.decode('utf-8'), uts46=True)
        except:
            try:
                remapped = idna.uts46_remap(url.host.decode('utf-8'))
                labels = remapped.split('.')
                punycode_labels = [idna2003.ToASCII(label) for label in labels]
                url.host = b'.'.join(punycode_labels)
            except:
                pass

"""
    Clean the fully qualified name, as defined in ENS `EIP-137
    `_

    This does *not* enforce whether ``name`` is a label or fully qualified domain.

    :param str name: the dot-separated ENS name
    :raises InvalidName: if ``name`` has invalid syntax
    """
    if not name:
        return name
    elif isinstance(name, (bytes, bytearray)):
        name = name.decode('utf-8')

    try:
        return idna.uts46_remap(name, std3_rules=True)
    except idna.IDNAError as exc:
        raise InvalidName(f"{name} is an invalid name, because {exc}") from exc

def encode(self, label):
        if label == '':
            return b''
        if self.allow_pure_ascii and is_all_ascii(label):
            return label.encode('ascii')
        if not have_idna_2008:
            raise NoIDNA2008
        try:
            if self.uts_46:
                label = idna.uts46_remap(label, False, self.transitional)
            return idna.alabel(label)
        except idna.IDNAError as e:
            raise IDNAException(idna_exception=e)