Method iter_fields

src/jinja2/nodes.py:147–167

This method iterates over all fields that are defined and yields ``(key, value)`` tuples. Per default all fields are returned, but it's possible to limit that to some fields by providing the `only` parameter or to exclude some using the `exclude` parameter. Both sho

(
        self,
        exclude: t.Optional[t.Container[str]] = None,
        only: t.Optional[t.Container[str]] = None,
    )

            raise TypeError(f"unknown attribute {next(iter(attributes))!r}")

    def iter_fields(
        self,
        exclude: t.Optional[t.Container[str]] = None,
        only: t.Optional[t.Container[str]] = None,
    ) -> t.Iterator[t.Tuple[str, t.Any]]:
        """This method iterates over all fields that are defined and yields
        ``(key, value)`` tuples.  Per default all fields are returned, but
        it's possible to limit that to some fields by providing the `only`
        parameter or to exclude some using the `exclude` parameter.  Both
        should be sets or tuples of field names.
        """
        for name in self.fields:
            if (
                (exclude is None and only is None)
                or (exclude is not None and name not in exclude)
                or (only is not None and name in only)
            ):
                try:
                    yield name, getattr(self, name)
                except AttributeError:
                    pass

    def iter_child_nodes(
        self,