A new session could not be created。

Message: A new session could not be created. (Original error: The following desired capabilities are required, but were not provided: platformName, deviceName)
Appium python运行出现的这个问题，请问要怎么解决，非常感谢。

你倒是附上代码或截图啊？估计是有几个参数没设置：platformName, deviceName