On Sun, Nov 05, 2017 at 01:14:54PM -0500, Paul G wrote:
> I'm not entirely sure I understand the full set of reasoning for this - I
> couldn't really tell what the problem with OrderedDict is from the link
> Stefan provided. It seems to me like a kind of huge change for the language
> to move from arbitrary-ordered to guaranteed-ordered dict. The problem I see
> is that this introduces a huge backwards compatibility burden on all
> implementations of Python.
Scientific applications want something like
{'a': 10, 'b': "foo", 'c': {'this': b'123'}}
as an ordered initializer for unboxed or typed (or both) data. In general,
if dicts are ordered, they can be used for example as initializers for
(nested) C structs.
> 2. Someone invents a new arbitrary-ordered container that would improve on
> the memory and/or CPU performance of the current dict implementation
I would think this is very unlikely, given that the previous dict implementation
has always been very fast. The new one is very fast, too.
Stefan Krah
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