AirPurifier set_mode

[airmonitor]

Hello,
Can I ask for small hint how to set up auto mode?
Tried:
airp = AirPurifier(filter_0_IP_address, filter_0_IP_token)
airp.set_mode("OperationMode.Auto")
airp.set_mode("Silent")
airp.set_mode("mode.auto")
airp.set_mode(mode=auto)

But constantly getting:
return self.send("set_mode", [mode.value])
AttributeError: 'str' object has no attribute 'value'

I'm new in python, sorry for newbie question :/

[airmonitor]

Found solution, I was missing OperationMode in import

from miio.airpurifier import AirPurifier, OperationMode

airp.set_mode(OperationMode.Silent)