or not items with "display:none" should be ignored

    extract_links : {None, "all", "header", "body", "footer"}
        Table elements in the specified section(s) with <a> tags will have their
        href extracted.

        .. versionadded:: 1.5.0

    Attributes
    ----------
    io : str or file-like
        raw HTML, URL, or file-like object

    match : regex
        The text to match in the raw HTML

    attrs : dict-like
        A dictionary of valid table attributes to use to search for table
        elements.

    encoding : str
        Encoding to be used by parser

    displayed_only : bool
        Whether or not items with "display:none" should be ignored

    extract_links : {None, "all", "header", "body", "footer"}
        Table elements in the specified section(s) with <a> tags will have their
        href extracted.

        .. versionadded:: 1.5.0

    Notes
    -----
    To subclass this class effectively you must override the following methods:
        * :func:`_build_doc`
        * :func:`_attr_getter`
        * :func:`_href_getter`
        * :func:`_text_getter`
        * :func:`_parse_td`
        * :func:`_parse_thead_tr`
        * :func:`_parse_tbody_tr`
        * :func:`_parse_tfoot_tr`
        * :func:`_parse_tables`
        * :func:`_equals_tag`
    See each method's respective documentation for details on their
    functionality.
    N