test_memoryview.py 文件源码

def check_getitem_with_type(self, tp):
        item = self.getitem_type
        b = tp(self._source)
        oldrefcount = getrefcount(b)
        m = self._view(b)
        self.assertEqual(m[0], item(b"a"))
        self.assertIsInstance(m[0], bytes)
        self.assertEqual(m[5], item(b"f"))
        self.assertEqual(m[-1], item(b"f"))
        self.assertEqual(m[-6], item(b"a"))
        # Bounds checking
        self.assertRaises(IndexError, lambda: m[6])
        self.assertRaises(IndexError, lambda: m[-7])
        self.assertRaises(IndexError, lambda: m[sys.maxsize])
        self.assertRaises(IndexError, lambda: m[-sys.maxsize])
        # Type checking
        self.assertRaises(TypeError, lambda: m[None])
        self.assertRaises(TypeError, lambda: m[0.0])
        self.assertRaises(TypeError, lambda: m["a"])
        m = None
        self.assertEqual(getrefcount(b), oldrefcount)