>>> def s(liste):
... print(id(liste))
... liste += [47,11]
... print(id(liste))
...
>>> fib = [0,1,1,2,3]
>>> id(fib)
24746248
>>> s(fib)
24746248
24746248
>>> id(fib)
24746248
>>> fib
[0, 1, 1, 2, 3, 47, 11]
Different Behavior if not in-place:
>>> def s(liste):
... liste = liste + [47,11]
...
>>> fib = [0,1,1,2,3]
>>> s(fib)
>>> fib
[0, 1, 1, 2, 3]