class FlashMiddleware:
	def process_response(self, request, response):
		try:
			request.session['flash'] = request.flash
		except:
			pass
		return response

def flash(request):
	if 'flash' in request.session:
		flash = request.session['flash']
		del request.session['flash']
		return {'flash': flash}
	return {'flash': None}