def salesboard(request):
    # render the graph here
    data =  [
            ['Year', 'Sales', 'Expenses'],
            [2004, 1000, 400],
            [2005, 1170, 460],
            [2006, 660, 1120],
            [2007, 1030, 540]
        ]
    chart = flot.LineChart(SimpleDataSource(data=data), html_id="Line Chart")
    return render_to_response('scoreboard.html', {'chart':chart})

Error during template rendering

In template C:UsersTIMLEU~1DesktopSYSTEM~1sp-venvlibsite-packagesgraphostemplatesgraphosflot.html, error at line 4
<zip object at 0x00000052AAC8D448> is not JSON serializable
1   <div id="{{ chart.html_id }}" style="width:{{ chart.width }}px;height:{{ chart.height }}px;"></div>
2   <script type="text/javascript">
3   $(function () {
4       data{{ chart.html_id }} = {{ chart.get_series_objects_json|safe }}
5       $plot{{ chart.html_id }} = $.plot(
6           $("#{{ chart.html_id }}"),
7           data{{ chart.html_id }},
8           {{ chart.get_options_json|safe }}
9       );
10  });
11  </script>