test_base.py 文件源码

def test_isin_nan(self):
        tm.assert_numpy_array_equal(
            Index(['a', np.nan]).isin([np.nan]), [False, True])
        tm.assert_numpy_array_equal(
            Index(['a', pd.NaT]).isin([pd.NaT]), [False, True])
        tm.assert_numpy_array_equal(
            Index(['a', np.nan]).isin([float('nan')]), [False, False])
        tm.assert_numpy_array_equal(
            Index(['a', np.nan]).isin([pd.NaT]), [False, False])
        # Float64Index overrides isin, so must be checked separately
        tm.assert_numpy_array_equal(
            Float64Index([1.0, np.nan]).isin([np.nan]), [False, True])
        tm.assert_numpy_array_equal(
            Float64Index([1.0, np.nan]).isin([float('nan')]), [False, True])
        tm.assert_numpy_array_equal(
            Float64Index([1.0, np.nan]).isin([pd.NaT]), [False, True])