[FEATURE] NumPy 2.0 support

[jakirkham]

Problem description

NumPy 2.0 is coming out soon ( numpy/numpy#24300 ). NumPy 2.0.0rc1 packages for conda & wheels came out 3 weeks back ( numpy/numpy#24300 (comment) )

Proposal

To prepare for NumPy 2.0, it might be worthwhile to start testing against NumPy 2 in CI

NumPy has put out a migration guide. More details are in the release notes

If ContourPy make use of NumPy's C API (and produces wheels that use it), having a release of ContourPy with wheels built against NumPy 2.0.0rc1 would be helpful to ensure NumPy 1 & 2 compatible wheels (as wheels built against NumPy 1 won't be compatible with NumPy 2). More details in this NumPy 2 ABI doc

Also as NumPy is tracking ecosystem support for NumPy 2.0, it would be helpful to share ContourPy's current support status in issue (with any plans): numpy/numpy#26191

[ianthomas23]

ContourPy 1.2.1 already supports NumPy 2.0 and has done so for a number of weeks. It is listed in the changelog. It is already listed in the NumPy issue that you are asking for it to be listed on.

@jakirkham I know these issues are auto-generated, but you really should check beforehand to see if they are required rather than waste other developers' time. Now you have a chain of issues linked to this unnecessary one to waste even more peoples' time ...

[jakirkham]

Apologies Ian. Wasn't intending to create noise or extra work. Sorry for that 😞