Non-deterministic set ordering
Rob Cliffe
rob.cliffe at btinternet.com
Sun May 15 23:01:10 EDT 2022
I was shocked to discover that when repeatedly running the following
program (condensed from a "real" program) under Python 3.8.3
for p in { ('x','y'), ('y','x') }:
print(p)
the output was sometimes
('y', 'x')
('x', 'y')
and sometimes
('x', 'y')
('y', 'x')
Can anyone explain why running identical code should result in
traversing a set in a different order?
Thanks
Rob Cliffe
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