Replace numexpr?

[cbrnr]

Currently, picard cannot easily be used with Python 3.13, because numexpr (one of its dependencies) does not provide wheels. I'm not even sure if numexpr is still maintained, since I've already opened an issue but received no reply so far (plus there has been almost no activity for a long time in general).

Therefore, I was wondering if it was possible to replace numexpr e.g. with plain NumPy operations? If so, numexpr could be an optional dependency that would speed up computations if available.

Bonus question: Do you have an estimate on how much numexpr speeds up typical calculations performed in picard?

[pierreablin]

Thanks for the issue! This is fixed by #54 :)

For the bonus question, I do not remember; these were benchmarks I ran a while ago... using only numpy should be fine.

[cbrnr]

Thanks a lot for addressing this so quickly! Would it be possible to make a new release on PyPI? Again, thank you so much!

[agramfort]

@pierreablin can you push the update on pypi? you are also an admin. thanks

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[pierreablin]

Done, thanks !