[Python-Dev] [RFC] Removing pure Python implementation of OrderedDict (original) (raw)

Terry Reedy 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>> wrote:

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

More information about the Python-Dev mailing list