views.py for pdf

html_string = render_to_string('shop/pdf_invoice.html', context)

    with codecs.open('out.html', 'w', 'utf-8') as f:
       f.write(html_string)

    html = HTML(string=html_string)
    result = html.write_pdf()

    response = HttpResponse(content_type='application/pdf;')
    response['Content-Disposition'] = 'inline; filename=invoice' + \
        str(customers.id)+customers.customer_uid + customers.customer_name + '.pdf'
    response['Content-Transfer-Encoding'] = 'utf-8'

    with tempfile.NamedTemporaryFile(mode='wb+') as output:
        output.write(result)
        output.flush()
        output = open(output.name, 'wb+')
        response.write(output.read())

    return response