test_compat.py 文件源码

def test_compat():
    # test we have compat with our version of nu

    from pandas.computation import _NUMEXPR_INSTALLED
    try:
        import numexpr as ne
        ver = ne.__version__
        if ver == LooseVersion('2.4.4'):
            assert not _NUMEXPR_INSTALLED
        elif ver < LooseVersion('2.1'):
            with tm.assert_produces_warning(UserWarning,
                                            check_stacklevel=False):
                assert not _NUMEXPR_INSTALLED
        else:
            assert _NUMEXPR_INSTALLED

    except ImportError:
        raise nose.SkipTest("not testing numexpr version compat")