def uri_to_iri(value):
    """
    Converts an ASCII URI byte string into a unicode IRI

    :param value:
        An ASCII-encoded byte string of the URI

    :return:
        A unicode string of the IRI
    """

    if not isinstance(value, byte_cls):
        raise TypeError(unwrap(
            '''
            value must be a byte string, not %s
            ''',
            type_name(value)
        ))

    parsed = urlsplit(value)

    scheme = parsed.scheme
    if scheme is not None:
        scheme = scheme.decode('ascii')

    username = _urlunquote(parsed.username, remap=[':', '@'])
    password = _urlunquote(parsed.password, remap=[':', '@'])
    hostname = parsed.hostname
    if hostname:
        hostname = hostname.decode('idna')
    port = parsed.port
    if port and not isinstance(port, int_types):
        port = port.decode('ascii')

    netloc = ''
    if username is not None:
        netloc += username
        if password:
            netloc += ':' + password
        netloc += '@'
    if hostname is not None:
        netloc += hostname
    if port is not None:
        netloc += ':' + str_cls(port)

    path = _urlunquote(parsed.path, remap=['/'], preserve=True)
    query = _urlunquote(parsed.query, remap=['&', '='], preserve=True)
    fragment = _urlunquote(parsed.fragment)

    return urlunsplit((scheme, netloc, path, query, fragment))
Converts an ASCII URI byte string into a unicode IRI

    :param value:
        An ASCII-encoded byte string of the URI

    :return:
        A unicode string of the IRI