'Glances API RESTFul implementation.
Return the help data or 404 error.'

def _api_help(self):

    response.content_type = 'application/json'
    view_data = self.stats.get_plugin('help').get_view_data()
    try:
        plist = json.dumps(view_data, sort_keys=True)
    except Exception as e:
        abort(404, ('Cannot    get    help    view    data    (%s)' % str(e)))
    return plist
