import abc


class AHeater:
	def __init__(self):
		pass

	@abc.abstractmethod
	def get_power_min(self):
		pass

	@abc.abstractmethod
	def get_power_max(self):
		pass

	@abc.abstractmethod
	def activate(self, enable):
		return None

	@abc.abstractmethod
	def process(self):
		pass

	@abc.abstractmethod
	def setPower(self, power):
		pass

	@abc.abstractmethod
	def getPower(self):
		return None

	@abc.abstractmethod
	def connect_power_changed(self, func):
		pass