@av._output_format<EOL><INDENT>@av._call_api_on_func<EOL>def get_monthly(self, symbol):<DEDENT>
_FUNCTION_KEY = "<STR_LIT>"<EOL>return _FUNCTION_KEY, '<STR_LIT>', '<STR_LIT>'<EOL>
Return monthly time series in two json objects as data and
        meta_data. It raises ValueError when problems arise

        Keyword Arguments:
            symbol:  the symbol for the equity we want to get its data