Apache+mod_wsgi+django+matplotlib+unicode

def graph(request):

    fig=Figure(figsize=(11, 7))

    ax=fig.add_subplot(111)

    x=[]
    y=[]
    #print(request.GET)

    que1= DbavlTestpsqlParam1Test.objects.filter(tm__gte=datetime.datetime.strptime(request.GET.get('dt_first'), '%Y-%m-%d %H:%M:%S'),
                                                 tm__lte=datetime.datetime.strptime(request.GET.get('dt_end'), '%Y-%m-%d %H:%M:%S'))
    print que1.query
    for p in que1:
        #print p
        x.append(p.tm)
        y.append(p.val/100)
    ax.plot(x, y,label=u'Зона 1')
    ax.xaxis.set_major_formatter(DateFormatter('%Y-%m-%d %H:%M:%S'))
    fig.autofmt_xdate()
    major_ticks = np.arange(0, 1400,100)
    ax.set_yticks(major_ticks)
    ax.grid(True)
    ax.legend(loc='upper left')
    ax.set_ylabel(u'Температура')
    canvas=FigureCanvas(fig)
    response=django.http.HttpResponse(content_type='image/png')
    canvas.print_png(response)
    return response