Method class_traits

traitlets/traitlets.py:1784–1815

Get a ``dict`` of all the traits of this class. The dictionary is keyed on the name and the values are the TraitType objects. This method is just like the :meth:`traits` method, but is unbound. The TraitTypes returned don't know anything about the values that the v

(cls: type[HasTraits], **metadata: t.Any)

    @classmethod
    def class_traits(cls: type[HasTraits], **metadata: t.Any) -> dict[str, TraitType[t.Any, t.Any]]:
        """Get a ``dict`` of all the traits of this class.  The dictionary
        is keyed on the name and the values are the TraitType objects.

        This method is just like the :meth:`traits` method, but is unbound.

        The TraitTypes returned don't know anything about the values
        that the various HasTrait's instances are holding.

        The metadata kwargs allow functions to be passed in which
        filter traits based on metadata values.  The functions should
        take a single value as an argument and return a boolean.  If
        any function returns False, then the trait is not included in
        the output.  If a metadata key doesn't exist, None will be passed
        to the function.
        """
        traits = cls._traits.copy()

        if len(metadata) == 0:
            return traits

        result = {}
        for name, trait in traits.items():
            for meta_name, meta_eval in metadata.items():
                if not callable(meta_eval):
                    meta_eval = _SimpleTest(meta_eval)
                if not meta_eval(trait.metadata.get(meta_name, None)):
                    break
            else:
                result[name] = trait

        return result

    @classmethod
    def class_own_traits(