在应用当中，python 等待加载时间过长或者调试时间过长都会导致Appium服务的会话超时
处理方式是在capabilities里面加newCommandTimeout参数如下
capabilities = {"platformName": "Android","automationName": "uiautomator2","deviceName": "127.0.0.1:62001","app": "D:\\resources\\ApiDemos-debug.apk","newCommandTimeout": 120, # 设置会话时长，用于调试代码，默认为60S}