test_datetime.py 文件源码

def test_datetime_unary(self):
        for tda, tdb, tdzero, tdone, tdmone in \
                [
                 # One-dimensional arrays
                 (np.array([3], dtype='m8[D]'),
                  np.array([-3], dtype='m8[D]'),
                  np.array([0], dtype='m8[D]'),
                  np.array([1], dtype='m8[D]'),
                  np.array([-1], dtype='m8[D]')),
                 # NumPy scalars
                 (np.timedelta64(3, '[D]'),
                  np.timedelta64(-3, '[D]'),
                  np.timedelta64(0, '[D]'),
                  np.timedelta64(1, '[D]'),
                  np.timedelta64(-1, '[D]'))]:
            # negative ufunc
            assert_equal(-tdb, tda)
            assert_equal((-tdb).dtype, tda.dtype)
            assert_equal(np.negative(tdb), tda)
            assert_equal(np.negative(tdb).dtype, tda.dtype)

            # absolute ufunc
            assert_equal(np.absolute(tdb), tda)
            assert_equal(np.absolute(tdb).dtype, tda.dtype)

            # sign ufunc
            assert_equal(np.sign(tda), tdone)
            assert_equal(np.sign(tdb), tdmone)
            assert_equal(np.sign(tdzero), tdzero)
            assert_equal(np.sign(tda).dtype, tda.dtype)

            # The ufuncs always produce native-endian results
            assert_