List slicing on Python 2.7

[Arkadiusz Bulski]

I have a custom class (a lazy list-like container) that needs to support
slicing. The __getitem__ checks if index is of slice type, and does a list
comprehension over individual integer indexes. The code works fine on
Python 3 but fails on 2.7, both CPython and PyPy. The print inside
__getitem__ doesnt even get executed when its a slice. Does 2.7 have
different object model, where slices are handled by a different method than
__getitem__?

The implementation and error log
https://github.com/construct/construct/blob/8839aac2b68c9e8240e9d9c041a196b0a7aa7d9b/construct/core.py#L4785-L4796
https://github.com/construct/construct/blob/8839aac2b68c9e8240e9d9c041a196b0a7aa7d9b/tests/test_core.py#L1148
https://travis-ci.org/construct/construct/jobs/353782126#L887

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~ Arkadiusz Bulski