Method test_isalpha

numpy/_core/tests/test_strings.py:268–270

(self, in_, out, dt)

        (["abc", "aBc123"], [True, False]),
    ])
    def test_isalpha(self, in_, out, dt):
        in_ = np.array(in_, dtype=dt)
        assert_array_equal(np.strings.isalpha(in_), out)

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