还好，网上弄到的，，没有dual的数据库，可以试图用select函数不带from数据表的方式来实现返回值。
一段测试代码：
try: conn = psycopg2.connect(database=db.service_name, user=db.username, password=password, host=db.ip, port=db.port) cursor = conn.cursor() except Exception, e: context_dict = {'msg': e, 'address': db.ip, 'port': db.port} return render(request, 'sar/release_info.html', context_dict) sql = "SELECT 'OK' AS txt" try: cursor.execute(sql) x = cursor.fetchone()[0] except Exception,e: context_dict = {'msg': "密码认证通过，但SELECT功能出错", 'address': db.ip, 'port': db.port} return render(request, 'sar/release_info.html', context_dict) finally: cursor.close() conn.close() if x == 'OK': context_dict = {'msg': "数据库连接正常", 'sql': sql, 'address': db.ip, 'port': db.port } return render(request, 'sar/release_info.html', context_dict)
