data = {'charttype': charttype, 'chartdata': chartdata, 'chartcontainer':
    chartcontainer, 'extra': {'x_is_date': False, 'x_axis_format': '',
    'tag_script_js': True, 'jquery_on_ready': False}}
return render_to_response('piechart.html', data)
using django-nvd3 for charting, chart not showing