test_compat.py 文件源码

def check_invalid_numexpr_version(engine, parser):
    def testit():
        a, b = 1, 2
        res = pd.eval('a + b', engine=engine, parser=parser)
        tm.assert_equal(res, 3)

    if engine == 'numexpr':
        try:
            import numexpr as ne
        except ImportError:
            raise nose.SkipTest("no numexpr")
        else:
            if ne.__version__ < LooseVersion('2.1'):
                with tm.assertRaisesRegexp(ImportError, "'numexpr' version is "
                                           ".+, must be >= 2.1"):
                    testit()
            elif ne.__version__ == LooseVersion('2.4.4'):
                raise nose.SkipTest("numexpr version==2.4.4")
            else:
                testit()
    else:
        testit()