test_multiarray.py 文件源码

def test_object(self):  # gh-6312
        a = np.random.choice(10, 1000)
        b = np.random.choice(['abc', 'xy', 'wz', 'efghi', 'qwst', 'x'], 1000)

        for u in a, b:
            left = np.lexsort((u.astype('O'),))
            right = np.argsort(u, kind='mergesort')
            assert_array_equal(left, right)

        for u, v in (a, b), (b, a):
            idx = np.lexsort((u, v))
            assert_array_equal(idx, np.lexsort((u.astype('O'), v)))
            assert_array_equal(idx, np.lexsort((u, v.astype('O'))))
            u, v = np.array(u, dtype='object'), np.array(v, dtype='object')
            assert_array_equal(idx, np.lexsort((u, v)))