[issue32107] Improve MAC address calculation and fix test_uuid.py

[Xavier de Gaye]

Xavier de Gaye <xdegaye at gmail.com> added the comment:

> I don't know how the proposed change can help.

It helps by fixing the regression introduced by a change made in  23df2d1304ece169d7e0dfc843dfb8026b413d9f in this issue, a change that has been made only in the master branch. Before that change, successive calls to getnode() returned the same value on Android. The proposed PR 4677 does not fix that regression and hides that regression instead in the test suite.

The fact that getnode() should always return the same value or should not, must be discussed in another issue in the case where that point needs to be raised.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32107>
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