title: OSError: cannot load library 'gobject-2.0': error 0x7e
body: <p>I installed the package <strong>weasyprint</strong> according to the instructions <a href="https://weasyprint.readthedocs.io/en/latest/install.html#windows" rel="noreferrer">Installing weasyprint</a> (Django project).
  My system: win 10. I have installed <strong>gtk3</strong> and it is present in my <strong>PATH</strong>
  <a href="https://i.stack.imgur.com/xY7uR.png" rel="noreferrer"><img src="https://i.stack.imgur.com/xY7uR.png" alt="PAYH gtk3" /></a></p>
  <pre><code>import weasyprint
  ...
  @staff_member_required
  def order_admin_pdf(request, order_id):
      # Получаем заказ по ID:
      order = get_object_or_404(Order, id=order_id)
      # Передаем объект в функцию render_to через генерацию шаблона pdf.html HTML в виде строки:
      html = render_to_string('shop/orders/order_admin_pdf.html',
                              {'order': order})
      # Создаем объект овтета с типом содержимого application/pdf и заголовком Content-Disposition:
      response = HttpResponse(content_type='application/pdf')
      response['Content-Disposition'] = 'filename=order_{}.pdf&quot;'.format(order.id)
      # Вызов метода weasyprint для получения PDF документа:
      weasyprint.HTML(string=html).write_pdf(response,
                                             stylesheets=[weasyprint.CSS(
                                                 settings.STATIC_ROOT + 'css/pdf.css')])
      return response
  </code></pre>
  <blockquote>
  <p>OSError: cannot load library 'gobject-2.0': error 0x7e.  Additionally, ctypes.util.find_library() did not manage to locate a library called 'gobject-2.0'</p>
  </blockquote>