def __init__(self, default_value='2015-04-13', **kwargs):
        """
        Args:
            default_value (str): date string (yyyy-mm-dd)
            kwargs: See Widget.__init__()
        """
        super(Date, self).__init__('date', default_value, **kwargs)
def __init__ ( self , default_value = '2015-04-13' , ** kwargs ) : super ( Date , self ) . __init__ ( 'date' , default_value , ** kwargs )
Args:
            default_value (str): date string (yyyy-mm-dd)
            kwargs: See Widget.__init__()