多重继承:采用0个位置参数,但给出了1个[重复]

在测试多重继承时,我有以下日期、时间和日期时间类继承权

class time:
    def __init__(self, time):
        self.time = time 

    def getTime():
        return self.time;

class date:
    def __init__(self, date):
        self.date = date

    def getDate():
        return self.date

class datetime(time,date):
    def __init__(self, input_time, input_date):
        time.__init__(self, input_time)
        date.__init__(self, input_date)

实例化和检查日期工作正常:

my_datetime = datetime("12PM","Today")
my_datetime.date

'Today'

但是运行getdate函数会导致参数错误,我不明白为什么

my_datetime.getDate()

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-17-120ecf58a608> in <module>
----> 1 my_datetime.getDate()

TypeError: getDate() takes 0 positional arguments but 1 was given