python 3.0+ Ellipsis

python2:
```py
>>> Ellipsis
Ellipsis
```
python3:
```py
>>> ...
Ellipsis
>>> Ellipsis
Ellipsis
```
`... and pass`
```py
>>> def test():
               ...  # or pass
>>> a = [1, 2, 3, 4, 5]
>>> a.append(a)
>>> print(a)
[1, 2, 3, 4, 5, [...]]
```