unable to open IDLE for Python3.50rc1 on windows10 64bit AMD

[eryk sun]

On Wed, Dec 23, 2015 at 8:38 AM, Nicky Mac <nmcelwaine at gmail.com> wrote:
>
> I removed the old python2.7 entries in system Path, the PYTHON variables you
> mentioned are not present.
> All I have is Python35 in the PATH.

Maybe there's still a stale directory on sys.path for another reason.
Print sys.path from the command prompt:

    python -c "import sys; print(*sys.path, sep='\n')"

P.S. Please reply to the list also this time.