def save(self, filename=None):
        filename = Path(filename) if filename is not None else self.filename
        with filename.open("w") as f:
            f.write(self.yaml)
def test_boolean_with_python_bool(self):
        """Input that is already a native python `bool` should be passed through
        without extra processing."""
        assert_equal(inputs.boolean(True), True)
        assert_equal(inputs.boolean(False), False)