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大家下午好。我有一个models.py包含其他类之一的文件，包括这样的类。

class Reportage:
def get_num(self):
    end_date = self.date.end_date
    start_date = self.date.start_date
    duration = time.mktime(end_date.timetuple()) - time.mktime(start_date.timetuple())
    delta_t = duration / 60
    num = []

    for t in range(0,duration,delta_t):
        start = t + start_date
        end = datetime.timedelta(0,t+delta_t) + start_date
        n_num = self.get_num_in_interval(start,end)
        num.append([t, n_num])
    num_json=simplejson.dumps(num)
    return num_json

现在我想使用插件jqPlot将数组“num”放在图表上。网站http://www.jqplot.com上建议的脚本如下：

<script type="text/javascript">
        $(document).ready(function(){
        // Our ajax data renderer which here retrieves a text file.
        // it could contact any source and pull data, however.
        // The options argument isn't used in this renderer.
        var ajaxDataRenderer = function(url, plot, options) {
            var ret = null;
            $.ajax({
                // have to use synchronous here, else the function
                // will return before the data is fetched
                async: false,
                url: url,
                dataType:"json",
                success: function(data) {
                    ret = data;
                }
            });
            return ret;
        };

        // The url for our json data
        var jsonurl = "./jsondata.txt";

        // passing in the url string as the jqPlot data argument is a handy
        // shortcut for our renderer.  You could also have used the
        // "dataRendererOptions" option to pass in the url.
        var plot2 = $.jqplot('chart2', jsonurl,{
            title: "AJAX JSON Data Renderer",
            dataRenderer: ajaxDataRenderer,
            dataRendererOptions: {
                unusedOptionalUrl: jsonurl
            }
        });
    });
    </script>

如何使用此脚本在图表上表示矢量“num”？我应该在脚本中更改什么？

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