Override the standard 500 error page to display the stack trace if certain conditions are met. The advantage of overriding the server error handler is, it keeps everything else intact - example all the error emails, etc.

handler_500.py

from django.views.debug import technical_500_response
from django.views.defaults import server_error

def server_error_handler(request):

    ip_address = request.META.get("HTTP_X_FORWARDED_FOR", request.META.get("REMOTE_ADDR"))
    if ip_address in settings.ALLOWED_IPS_FOR_DEBUG_SCREEN: #or request.user.is_staff
        return technical_500_response(request, *sys.exc_info())

    return server_error(request)

urls.py

from .handler_500 import server_error_handler

handler500 = server_error_handler