[issue17883] Fix buildbot testing of Tkinter

[Ezio Melotti]

Ezio Melotti added the comment:

FTR there's also test.support.assert_python_ok and test.support.assert_python_failure (and a few convenience functions in subprocess too).  I suspect that if the import fails, stdout is empty, and stderr will contain the error message.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17883>
_______________________________________