def format_valid_streams(plugin, streams):
    """Formats a dict of streams.

    Filters out synonyms and displays them next to
    the stream they point to.

    Streams are sorted according to their quality
    (based on plugin.stream_weight).

    """

    delimiter = ", "
    validstreams = []

    for name, stream in sorted(streams.items(),
                               key=lambda stream: plugin.stream_weight(stream[0])):
        if name in STREAM_SYNONYMS:
            continue

        synonymfilter = lambda n: stream is streams[n] and n is not name
        synonyms = list(filter(synonymfilter, streams.keys()))

        if len(synonyms) > 0:
            joined = delimiter.join(synonyms)
            name = "{0} ({1})".format(name, joined)

        validstreams.append(name)

    return delimiter.join(validstreams)
Formats a dict of streams.

    Filters out synonyms and displays them next to
    the stream they point to.

    Streams are sorted according to their quality
    (based on plugin.stream_weight).

    
src/livestreamer_cli/main.py