def __call__(self, field_data, all_data):
        if all_data.has_key(self.other_field) and all_data[self.other_field] is self.other_value:
            for v in self.validator_list:
                v(field_data, all_data)
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-0.96/django/core/validators.py/ValidateIfOtherFieldEquals.__call__/operator `==` -> `is`