[Python-Dev] Changing the order of iteration over a dictionary (original) (raw)
Fred Drake fdrake at acm.org
Fri Jan 20 12:11:47 CET 2012
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On Fri, Jan 20, 2012 at 5:49 AM, Mark Shannon <mark at hotpy.org> wrote:
So, don't be afraid to change that hash function :)
Definitely.
The hash function has been changed in the past, and a lot of developers were schooled in not relying on the iteration order. That's a good thing, as those developers now write tests of what's actually important rather than relying on implementation details of the Python runtime.
A hash function that changes more often than during an occasional major version update will encourage more developers to write better tests. We can think of it as an educational tool.
-Fred
-- Fred L. Drake, Jr. "A person who won't read has no advantage over one who can't read." --Samuel Langhorne Clemens
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