import abc
import logging


class ATemperatureSensor:
	def log(self, s):
		d = {'user': "TemperatureSensor" + "::" + self.name()}
		logging.info ("{}".format(s), extra=d)

	@abc.abstractmethod
	def name(self):
		return ""

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