How to install numpy development headers in OpenSUSE LEAP 15.5

If you get an error message such as

python/project/main.cpp:32:10: fatal error: numpy/arrayobject.h: No such file or directory
 #include <numpy/arrayobject.h>
          ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.

on OpenSUSE LEAP 15.5, you need to install the python3-numpy-devel package:

sudo zypper install python3-numpy-devel