test_sys.py 文件源码

def test_recursionlimit(self):
        self.assertRaises(TypeError, sys.getrecursionlimit, 42)
        oldlimit = sys.getrecursionlimit()
        self.assertRaises(TypeError, sys.setrecursionlimit)
        self.assertRaises(ValueError, sys.setrecursionlimit, -42)
        sys.setrecursionlimit(10000)
        self.assertEqual(sys.getrecursionlimit(), 10000)
        sys.setrecursionlimit(oldlimit)

        self.assertRaises(OverflowError, sys.setrecursionlimit, 1 << 31)
        try:
            sys.setrecursionlimit((1 << 31) - 5)
            try:
                # issue13546: isinstance(e, ValueError) used to fail
                # when the recursion limit is close to 1<<31
                raise ValueError()
            except ValueError, e:
                pass
        finally:
            sys.setrecursionlimit(oldlimit)