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Thu Oct 4 15:32:25 CEST 2012 · https://mail.python.org/pipermail/python-dev/2012-October/122063.html

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On 03/10/12 17:27, Nick Coghlan wrote:
> I received a fair number of complaints from people that wanted to 
> experiment with yield from, but couldn't, because the first alpha 
> wasn't out yet and they weren't sufficiently interested to go to
> the effort of building their own copy of Python.

In my job, we do "alpha" releases quite frequently. The promises for
alpha is: a) no feature complete, b) the API, etc , can change before
release, c) features included are useable. The point is to use them
and experiment with them.

We don't call them "alphas", but "engineering previews". And they
expires after six months.

Delivering useable alphas requires to do a "minimal" of release
engineering, like disabling features half done, documenting known
bugs, etc. So yes, it it a bit of extra work.

In Python context, the idea of somebody using a "alpha" in production
is scary, and I have a few bad experiences doing a "make install" of a
alpha and when installing the final release keeping some alpha files
around causing erratic behaviour until I did a "\rm -r
/usr/local/SOME" and reinstall again. I think it happened to me with
2.6 :). There are some consequences here, like bytecode (pyc) changes,
modules renaming or vanishing before the final release, etc.

- -- 
Jesús Cea Avión                         _/_/      _/_/_/        _/_/_/
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"Things are not so easy"      _/_/  _/_/    _/_/  _/_/    _/_/  _/_/
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"El amor es poner tu felicidad en la felicidad de otro" - Leibniz
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[Python-Dev] Proposed schedule for Python 3.4