Method coerce

tests/test_traitlets.py:1761–1764

(self, value)

    _bad_values = [10, (1, 2), ("a"), (), None]

    def coerce(self, value):
        if value is not None:
            value = tuple(value)
        return value

    def test_invalid_args(self):
        self.assertRaises(TypeError, Tuple, 5)