# views.py
from django.conf import settings
from django.template import Context, loader

def server_error(request, template_name='500.html'):
    "Always includes MEDIA_URL"
    from django.http import HttpResponseServerError
    t = loader.get_template(template_name)
    return HttpResponseServerError(t.render(Context({'MEDIA_URL': settings.MEDIA_URL})))

# urls.py
handler500 = 'views.server_error'