jstraitlets.py 文件源码

def generic_visit(self, trait, dct, *args, **kwargs):
        if dct is None or dct is undefined:
            return dct
        if isinstance(dct, (six.integer_types, six.string_types, bool, float)):
            return dct
        else:
            raise T.TraitError('cannot set {0} to {1}'.format(trait, dct))