[Python-Dev] [RFC] Removing pure Python implementation of OrderedDict
tjreedy at udel.edu
Tue Sep 5 14:00:55 EDT 2017
On 9/5/2017 10:40 AM, Guido van Rossum wrote:
> On Tue, Sep 5, 2017 at 5:58 AM, Simon Cross
> <hodgestar+pythondev at gmail.com <mailto:hodgestar+pythondev at gmail.com>>
> I thought the decision a few years ago was that all modules that
> have a C library for performance reasons should also have a Python
> version? Did this decision change at some point? (just curious).
> It was never meant as a hard rule. IIRC the actual rule is more that
> *if* you have both a C and a Python version they need to supply the same
> API, *and* the naming should be e.g. _pickle (C) and pickle (Python),
> *and* the Python version should automatically replace itself with the C
> version when the latter exists (e.g. by putting an import * at the end
> with a try/except around it).
*And* both versions should be tested in the test file ;-).
Terry Jan Reedy
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