biitbake processed the settings in conf/local.conf.
use this IMAGE_INSTALL_append = “python3 python3-subprocess” insted of CORE_IMAGE_EXTRA_INSTALL
If you use CORE_IMAGE_EXTRA_INSTALL bitbake does not install what image is needed.
you can go to corresponding recipes of .bb file and
IMAGE_INSTALL += “python3 python3-subprocess”
CORE_IMAGE_EXTRA_INSTALL has the same effect as IMAGE_INSTALL_append and IMAGE_INSTALL.
yocto version we use is old and it has some packaging problem therefore “python3-misc” need to be added to the image too.