Reading a file in IDLE 3 on Mac-Lion

[Franck Ditter]

Hello,
I create a text file utf-8 encoded in Python 3 with IDLE (Mac Lion).
It runs fine and creates the disk file, visible with
TextWrangler or another.
But I can't open it with IDLE (its name is greyed).
IDLE is supposed to read utf-8 files, no ?
This works on Windows-7.
Thanks for the tip,

    franck