def embedded_data(symbol_name):
    """Reads a symbol from the uWSGI binary image.

    * http://uwsgi.readthedocs.io/en/latest/Embed.html

    .. warning:: Bytes are returned for Python 3.

    :param str|unicode symbol_name: The symbol name to extract.

    :rtype: bytes|str

    :raises ValueError: If symbol is unavailable.
    """
