'Query or modify the options for the specified tagname.
If kw is not given, returns a dict of the option settings for tagname.
If option is specified, returns the value for that option for the
specified tagname. Otherwise, sets the options to the corresponding
values for the given tagname.'

def tag_configure(self, tagname, option=None, **kw):

    if (option is not None):
        kw[option] = None
    return _val_or_dict(kw, self.tk.call, self._w, 'tag', 'configure', tagname)
