last pass of for x in iterator:

[Gribouillis]

more_itertools actually already implements the feature

>>> from more_itertools import islice_extended
>>> list(islice_extended(range(10), None, -2))
[0, 1, 2, 3, 4, 5, 6, 7]
>>> list(islice_extended(range(10), None, -1))
[0, 1, 2, 3, 4, 5, 6, 7, 8]

[Skaperen]

i could end up with a rather huge list so i'd rather do the one-behind generator. this is to be run on my own computers, so installing stuff from pip is not an issue. more_itertools sure has a lot of methods.

[DeaD_EyE]

For a nice API, you could improve itertools.islice() by allowing a negative stop argument.

Yes please. I miss this feature also. I want to have also reversible iterators (for finite sequences).
If you have a solution to reverse a infinite sequence, tell us

[Yoriz]

If you have a solution to reverse a infinite sequence, tell us

import itertools

from time_machine import future, present, step_back_in_time

for item in itertools.islice(infinite_sequence, future, present, step_back_in_time):
    print(item)