``uuid.getnode()`` now preferentially returns universally administered MAC addresses if available, over locally administered MAC addresses. This makes a better guarantee for global uniqueness of UUIDs returned from ``uuid.uuid1()``. If only locally administered MAC addresses are available, the first such one found is returned.
Also improve internal code style by being explicit about ``return None`` rather than falling off the end of the function.
Improve the test robustness.
* Document how comparison of UUID objects work
* Document str(uuid) returns the braceless standard form
* Add a test for comparison of a UUID object with a non-UUID object
Patch by Ammar Askar.
180909
Farhaan Bukhsh
Serhiy Storchaka
Barry Warsaw
Xiang Zhang
Berker Peksag
Terry Jan Reedy
Ezio Melotti
Georg Brandl