How to use the sun.sun.__timefromdecimalday function in sun

def sunrise(self,when=None):
  """
  return the time of sunrise as a datetime.time object
  when is a datetime.datetime object. If none is given
  a local time zone is assumed (including daylight saving
  if present)
  """
  if when is None : when = datetime.now(tz=LocalTimezone())
  self.__preptime(when)
  self.__calc()
  return sun.__timefromdecimalday(self.sunrise_t)

def sunset(self,when=None):
  if when is None : when = datetime.now(tz=LocalTimezone())
  self.__preptime(when)
  self.__calc()
  return sun.__timefromdecimalday(self.sunset_t)

def solarnoon(self,when=None):
  if when is None : when = datetime.now(tz=LocalTimezone())
  self.__preptime(when)
  self.__calc()
  return sun.__timefromdecimalday(self.solarnoon_t)