how can i create and use session variable in django code example

Example 1: how store list in django session

if not 'saved' in request.session or not request.session['saved']:
		request.session['saved'] = [obj]
	else:
		saved_list = request.session['saved']
		saved_list.append(obj)
		request.session['saved'] = saved_list

Example 2: django set session variable

request.session['idempresa'] = idempresaValue