Raise User-defined Exceptions issue

[QinghuaLong]

When trying to raise a user-defined exception the exception is not get inited correctly. Instead of the Exeption class it catch a tupple in the user defined handler instead. Could run the test like below to see if it works:

def test_exception():
with self.assertRaises(RseException) as context:
raise (RseException("test",700)
self.assertTrue(type(context.exception) is RseException)
self.assertEquals(context.exception.message, "test")
self.assertEquals(context.exception.code, 700)