def __init__(self, timer_klass=DateTimeTimer):
        """
        :param timer_klass:
        """
        self.timer_klass = timer_klass
        self.current_timer = None
        self.last_stopped_timer = None
        self.history_stopped_timer = list()
def __init__ ( self , timer_klass = DateTimeTimer ) : self . timer_klass = timer_klass self . current_timer = None self . last_stopped_timer = None self . history_stopped_timer = list ( )
:param timer_klass: