opencv-python Relax the build dependency on NumPy

Do not pin NumPy build dependencies to specific versions. It is no longer necessary since NumPy 1.25, as it automatically exposes "an API that is backwards compatible with the oldest NumPy version that supports the currently oldest compatible Python version" -- effectively removing the need to maintain downstream compatibility matrices.

See: https://numpy.org/devdocs/dev/depending_on_numpy.html#adding-a-dependency-on-numpy

Jul 07 '25 13:07 mgorny

Hello @mgorny Thanks a for the contribution. The versions are pinned for now on purpose: numpy switched to manylinux_x_y build environment since version 2.3. OpenCV still uses manylinux2014. We plan to revise dependencies and build environment for the next release and update build requirements.

Jul 08 '25 05:07 asmorkalov

Well, sure — but even then, using any numpy<2.3 to build should be fine, right?

Jul 08 '25 05:07 mgorny

In general - yes.

Jul 08 '25 06:07 asmorkalov