def METHOD_NAME(df):
    df["c"] = np.nan
    res = Description(df)
    dropped = res.frame.c.dropna()
    assert dropped.shape[0] == 2
    assert "missing" in dropped
    assert "nobs" in dropped
    df["c"] = np.nan
    res = Description(df.c)
    dropped = res.frame.dropna()
    assert dropped.shape[0] == 2