How to use the yaspin.compat.bytes function in yaspin

def _set_frames(spinner, reversal):
        # type: (base_spinner.Spinner, bool) -> Union[str, List]
        uframes = None  # unicode frames
        uframes_seq = None  # sequence of unicode frames

        if isinstance(spinner.frames, basestring):
            uframes = to_unicode(spinner.frames) if PY2 else spinner.frames

        # TODO (pavdmyt): support any type that implements iterable
        if isinstance(spinner.frames, (list, tuple)):

            # Empty ``spinner.frames`` is handled by ``Yaspin._set_spinner``
            if spinner.frames and isinstance(spinner.frames[0], bytes):
                uframes_seq = [to_unicode(frame) for frame in spinner.frames]
            else:
                uframes_seq = spinner.frames

        _frames = uframes or uframes_seq
        if not _frames:
            # Empty ``spinner.frames`` is handled by ``Yaspin._set_spinner``.
            # This code is very unlikely to be executed. However, it's still
            # here to be on a safe side.
            raise ValueError(
                "{0!r}: no frames found in spinner".format(spinner)
            )

        # Builtin ``reversed`` returns reverse iterator,
        # which adds unnecessary difficulty for returning
        # unicode value;

def to_unicode(text_type, encoding=ENCODING):
    if isinstance(text_type, bytes):
        return text_type.decode(encoding)
    return text_type