import time
import abc


class AStirrer(abc.ABC):
	def __init__(self):
		pass

	def log(self, s):
		print("{:.2f}: {}".format(time.time(), s))

	@abc.abstractmethod
	def process(self):
		pass

	@abc.abstractmethod
	def setRpm(self, rpm):
		pass

	@abc.abstractmethod
	def setCycleTime(self, time):
		pass

	@abc.abstractmethod
	def setDutyCycle(self, dutyCycle):
		pass

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

	@abc.abstractmethod
	def start(self):
		pass

	@abc.abstractmethod
	def stop(self):
		pass