django-serializer报错格式整理

def is_valid(self, raise_exception=False):
        assert hasattr(self, "initial_data"), (
            "Cannot call `.is_valid()` as no `data=` keyword argument was "
            "passed when instantiating the serializer instance."
        )

        if not hasattr(self, "_validated_data"):
            try:
                self._validated_data = self.run_validation(self.initial_data)
            except ValidationError as exc:
                self._validated_data = {}
                self._errors = exc.detail
            else:
                self._errors = {}

        if self._errors and raise_exception:
            errors = [
                ": ".join([self.fields.get(key).label, value[0]])
                for key, value in self._errors.items()
            ][0]
            raise ParseError(errors)

        return not bool(self._errors)