Python: How can I f-string values from multiple brace

`

command = f"""
            var targetDate = {target_date}
            var jcd = "01";
            var callback = arguments[0];
            var target_time = {target_time}
            
            url = '/rsv.selectTimeScd.dp/dmparse.dm';
            data = {{"fRsvD":targetDate, "fJiyukCd":"01"}};
            $('div.rsvTable tbody#rsvTableBody').html("");
            postAjax(url, data, function(result){{
                var timesList = result.times;
                var rowcnt_this = 1;

                for(var i=0; i<timesList.length; i++) {{
                    var rowcnt = timesList[i].rowcnt;
                    var label = timesList[i].rsLabel.replace(":", "시 ") + "분";
                    var btClass = '';

                    console.log(timesList[i].fRsvT.slice(0,2))
                    if (timesList[i].fRsvT.slice(0,2) == target_time)
                    ...

                    if(rowcnt_this == rowcnt)
                        rowcnt_this = 1;
                    else
                        rowcnt_this++;
                }}
                return callback;
            }})
        """
`

I am trying to execute_script in webdriver of selenium. And I need to pass data to multiple lines of string. However, there was multiple brace in the string, thus I replaced “{” into “{{“” However, it doesn’t work at all. How can I change the code in order to execute correctly?