[issue6906] Tkinter sets an unicode environment variable on win32

[Jon Foster]

Jon Foster <jon.foster at cabot.co.uk> added the comment:

This bug also breaks code that uses the subprocess module, e.g.:

env = os.environ.copy()
env['MY_VARIABLE'] = 'MY_VAL'
subprocess.Popen(... , env=env)

Fails on Windows 7 with an error that the environment can only contain strings.  The offending variables are TK_LIBRARY and TCL_LIBRARY, which have Unicode strings as their values.  I'm using Python 2.6.2.

(The subprocess module should probably be fixed to use CreateProcessW and handle Unicode, but that's a separate issue).

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nosy: +JonFoster

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<http://bugs.python.org/issue6906>
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