# TestComparisons
def setup_method(self): # setup method to be replaced
    self.A = np.array([['abc', 'abcc', '123'],
                       ['789', 'abc', 'xyz']]).view(np.char.chararray)
    self.B = np.array([['efg', 'efg', '123  '],
                       ['051', 'efgg', 'tuv']]).view(np.char.chararray)

    def test_not_equal(self):
        assert_array_equal((self.A != self.B), # calling self to access variables
                           [[True, True, False], [True, True, True]])

# TestComparisons
def _create_array_a(self): # "creation" methods used instead
    return np.array([['abc', 'abcc', '123'],
                        ['789', 'abc', 'xyz']]).view(np.char.chararray)

def _create_array_b(self):
    return np.array([['efg', 'efg', '123  '],
                        ['051', 'efgg', 'tuv']]).view(np.char.chararray)

def test_not_equal(self):
    (A, B) = (self._create_array_a(), self._create_array_b()) # calling creation methods to set up variables
    assert_array_equal((A != B),
                       [[True, True, False], [True, True, True]])