Method test_isdigit

numpy/_core/tests/test_strings.py:294–296

(self, in_, out, dt)

        (["a", "012345"], [False, True]),
    ])
    def test_isdigit(self, in_, out, dt):
        in_ = np.array(in_, dtype=dt)
        assert_array_equal(np.strings.isdigit(in_), out)

    @pytest.mark.parametrize("in_,out", [
        ("", False),