class WeatherForecast (object):
  def __init__ (self):
    self.sky = None
    self.high = None
    self.low  = None
  def set_skies (self, sky):
    self.sky = sky
  def set_high (self, high):
    self.high = high
  def set_low (self, low):
    self.low = low
  def get_skies (self):
    return self.sky
  def get_high(self):
    return self.high
  def get_low(self):
    return self.low