How to use a returned value?

[perfringo]

Then you should read the pep-3132 (Extended Iterable Unpacking).

PEP-s are (usually) good reads. Me likes unpacking in for-loop (especially if one wants to have mutable list as result):

>>> for item in [(1, 2, 3), (10, 11, 12)]: 
...     print(item[1:]) 
...                                                                                                                                        
(2, 3)                                         # slices are tuples
(11, 12)
>>> for first, *rest in [(1, 2, 3), (10, 11, 12)]: 
...     print(rest)
...
[2, 3]                                         # lists
[11, 12]