Python 3.13: chunk removed

[einstein95]

Bug report

Problem
Running pcbasic with Python 3.13 gives

  File "/lib/python3.13/site-packages/pcbasic/basic/devices/cassette.py", line 14, in <module>
    from chunk import Chunk
ModuleNotFoundError: No module named 'chunk'

The 3.13 changelog and PEP-594 give more rationale for the removal.

It may be possible to rewrite cassette.py to use the wave module instead.

[robhagemans]

Thanks for flagging - easiest is probably to vendor in the old chunk module as it is small, pure Python and basically does precisely what we need. I think that's going to be for a 2.1 branch though, at this point the current 2.0 branch should be considered Python 2.7 - 3.12 only (metadata probably needs updating).

The 2.1 branch will target 3.9+, allowing a large amount of compatibility code to be dropped.

[bugnano]

Chunk is available on pypi

https://pypi.org/project/chunk/

However:
Testing on Python 3.13.9 on Fedora 42, with uv 0.9.5 results in a failure.

The failure is in the way chunk from pypi wants to detect Python3, and it incorrectly detects my configuration as Python 2.

So, I was about to create a PR for this project in order to add chunk as a dependency in pyproject.toml, but decided not to, because it would still be buggy unfortunately.

It's an unfortunate situation, as now pcbasic is unusable on my machine.

EDIT: my bad, the chunk library on pypi has nothing to do with what the chunk module did in the stdlib.
I created a PR that vendors the version from Python 3.10, as was discussed in the previous comment instead.

[bugnano]

On an unrealted note, I see not activity on GitHub from Rob Hagemans since October of 2024. I'm wondering whether he's OK.

[robhagemans]

Hi @bugnano , thanks for your concern - I am well, however as it stands I lack the time to focus on my GitHub projects

[Marrin]

There is the standard-chunk PyPI package bringing chunk back from the „dead batteries“: https://pypi.org/project/standard-chunk/

[bugnano]

There is the standard-chunk PyPI package bringing chunk back from the „dead batteries“: https://pypi.org/project/standard-chunk/

Thanks, I didn't know that. However, given the recent supply chain attacks everywhere, I think that vendoring the chunk package as in the PR #258 is the better option, considering that it only consists of a small (168 lines) file that has not changed in years. The lesser dependencies, the better.