probe screen v2

Now Iam trying to connect touch probe and touch plate. I wanted to at least try figure out whats happening in the python scripts that are for probe screen v2. I finished at the start. I dont understand where I can find the python modules for linuxcnc. When I type import linuxcnc in my windows python it doesnt work - ok libraries (modules?) must be somewhere in the PC. So linuxcnc comes with this libraries when installed probably - ok.

There are another modules that are imported in the probe_screen.py, like pango, hal, hal_glib, pygtk...

Can I find somewhere full list of linuxcncs python modules? I was searching for that but usually only for single module when searched.
Where can I find this modules in linuxcnc environment?