Method B

numpy/_core/tests/test_defchararray.py:379–383

(self)

                         dtype='S').view(np.char.chararray)

    def B(self):
        return np.array([[' \u03a3 ', ''],
                         ['12345', 'MixedCase'],
                         ['123 \t 345 \0 ', 'UPPER']]) \
                          .view(np.char.chararray)

    def test_capitalize(self):
        A, B = self.A(), self.B()