Terry J. Reedy added the comment:
To my surprise, "python -m test test_idle" gives a single flash in Windows.
#22770 modified /Lib/test/support/__init__.py and added the creation and
packing of a Label. Those two lines are gone in repository 3.6 but the flash
is still there, I added root.withdraw() at line 469 and the flash is gone.
try:
from tkinter import Tk
root = Tk()
root.withdraw()
root.update()
root.destroy()
I added a Label packing back and the flash is still gone here.
> "use test.support.import_module with no reason " ???
I used import_module in test_idle because I was told to and had to to prevent
inappropriate test failures. Please explain what you mean.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue27918>
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