[issue7989] Add pure Python implementation of datetime module to CPython

Alexander Belopolsky report at bugs.python.org
Thu Jun 17 16:45:23 CEST 2010

Alexander Belopolsky <belopolsky at users.sourceforge.net> added the comment:

On Thu, Jun 17, 2010 at 10:31 AM, Marc-Andre Lemburg <report at bugs.python.org> wrote:
> To avoid the wasted memory and import time, it's better to use:
> try:
>    from _cmodule import *
> except ImportError:
>    from _pymodule import *

Hmm, I cannot find the relevant thread, but I thought this was rejected at some point.  Personally, I don't like this at all for the following reasons:

1. This introduces two _.. names instead of one.

2. This departs from established convention that C (or native) implementation for modulename is in _modulename, not _cmodulename.  Non-C implementations may still provide native _modulename, but would not want to call it _cmodulename.

3. Hiding python code in _pymodule makes it harder to find it.

> Why not import the two modules directly ?
> import _cmodule as module
> and
> import _pymodule as module

Because this requires having two modules in the first place.


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