def _cast_to_type(self, value):
        """ Convert the value to a date and raise error on failures"""
        if isinstance(value, datetime.datetime):
            return value.date()
        if isinstance(value, datetime.date):
            return value
        try:
            value = date_parser(value)
            return value.date()
        except ValueError:
            self.fail('invalid', value=value)
def _cast_to_type ( self , value ) : if isinstance ( value , datetime . datetime ) : return value . date ( ) if isinstance ( value , datetime . date ) : return value try : value = date_parser ( value ) return value . date ( ) except ValueError : self . fail ( 'invalid' , value = value )
Convert the value to a date and raise error on failures