1. var

2. __builtins__

3. dir(cls) # list class or object attributes, return list

3.1 __dict__ # ONLY list class or object __dict__ attributes, return dictory. But not all attributes are dictionay.

4. def __init__(self, out) self.x = x

5. classmethod

6. staticmethod

7. vars

8. *args, **kwargs

9. * operator

Misc.print_values(*args, **kwargs) # * operator tells print_values to unpack the list first

10. yield

11. reduce