Message 253829 - Python tracker

I'm not sure about "Neither you nor Python will be able to import 
the stdlib."  Depending on what the file is, you may be able to import
it later.  I'd prefer:

"If you run Python in this directory, your version of <stdlibname>
will be used instead of the one in the standard library.  This may cause Idle to behave strangely, or possibly not run at all."