Windows nightly installer has problems with Python and numpy

[jackjansen]

Subject says all.

[jackjansen]

note @zhouzhouha

[jackjansen]

There was no problem for me when I tried this, so it may have to do with the specific Python installation on the computer of @zhouzhouha . I have started testing whether #176 is partially doable: based on either the "Python found" or the self-installed Python 3.12, the installer (or cwipc_check install) will create a venv in the cwipc installation directory (hidden down in libexec/cwipc/venv). The scripts that are created there after the cwipc installation will be copied to the bin directory, and there's also going to be a cwipc_python.exe which will work like a normal Python interpreter but using that venv.

That should pretty much isolate cwipc from the normal Python installation. And if users really want to install the cwipc Python modules into their "normal" python they can always use cwipc_pymodules_install.