Terry J. Reedy <tjreedy at udel.edu> added the comment: Do you know anything about spaces in the button text causing the addition of {bra ces}? I would prefer not to have to use an underscore in Hello_World. I fixed the long line and also updated pack calls pass options by name instead of a dict. ---------- Added file: http://bugs.python.org/file24712/tk_hello.py _______________________________________ Python tracker <report at bugs.python.org> <http://bugs.python.org/issue14163> _______________________________________