[issue10652] test___all_ + test_tcl fails (Windows installed binary)

[Hirokazu Yamamoto]

Hirokazu Yamamoto <ocean-city at m2.ccsnet.ne.jp> added the comment:

I think this happens because 

1. test___all__.py imports tkinter module, and it
   imports tkinter/_fix.py
2. _fix.py sets TCL_LIBRARY etc as top level routine
3. regrtest.py resets os.environ after test___all__.py ends.
   so TCL_LIBRARY gone.
4. test_tcl.py tries to import tkinter module, but it won't
   be loaded twice, so TCL_LIBRARY won't be set.
5. tcl/tk cannot find its library

I think this can be fixed by save & restore sys.modules
before & after each tests, so that tkinter module can be
loaded again.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10652>
_______________________________________