def __str__(self) : return "({0},{1} -> {2}, {3})".format(Position.__str__(self),self.starting_time,self.ending_time,self.label)
def __str__(self) : return "({0},{1})".format(str(self.datetime),Position.__str__(self))
def __str__(self) : return "({0},{1} -> {2}, {3})".format(Position.__str__(self),self.starting_time,self.ending_time,self.label)
def __str__(self) : return "({0},{1})".format(str(self.datetime),Position.__str__(self))