Hi,
While having a poke at Panda3D + pypy, I realised I should test my build on CPython + found my build is probably broken - there is no panda3d.core:
$ python -c "from panda3d import core"
Traceback (most recent call last):
File "<string>", line 1, in <module>
ImportError: cannot import name 'core'
Apologies for the noise - it seems like I had previously installed panda3d via a package manager - once I uninstalled that and did a reboot installing via pip seems to work.