@staticmethod
def get_hms_from_sec(sec):
    """
        Returns a string of hours:minutes:seconds from the seconds given.

        @param sec: seconds
        @param return: h:mm:ss as string
        """
    assert sec.__class__ == int
    seconds = sec % 60
    minutes = sec // 60 % 60
    hours = sec // (60 * 60)
    return str(hours) + ':' + str(minutes).zfill(2) + ':' + str(seconds).zfill(
        2)
