python for flash drives

[Putty]

Is there such a thing as a special version of python that I can run
more efficiently from a flash drive?  I'll be at college for hours
every day with hours of free time for the next few months, but the only
computers at my disposal are windows PCs that use GoBack to auto-revert
every reboot.  So I'm kinda stuck.  I don't want to have to reinstall
python AND wxPython AND PIL every stinking time I log on.  However,
using it from my flash drive is painfully slow taking up to a minute
just to execute some scripts.  And it's not doing me any favors with
I/O to the flash disk either.

So I was wondering if anybody knew of some flash drive implementations
of python that might exist out there somewhere?