[Python-Dev] PEP 407 / splitting the stdlib

[Stephen J. Turnbull]

Nick Coghlan writes:

 > >From the stdlib feature development branch (these are the new interim
 > releases with standard library updates only as proposed by PEP 407):
 > Python 3.3.1 + stdlib 13.02.0  (~February 2013)
 > Python 3.3.2 + stdlib 13.08.0  (~August 2013)
 > Python 3.3.3 + stdlib 14.02.0  (~February 2014) (only upgrade path
 > from here is to make the jump to 3.4.0)
 > -- 3.4.0 + 12.08.0 is released from default branch --

Typo? -> 3.4.0 + 14.08.0, right?

 > Python 3.4.1 + stdlib 15.02.0  (~February 2015)

It seems to me there could be considerable divergence between the
stdlib code in

 > the default branch:
 > Python 3.4.0a1 + stdlib 14.08.0a1  (~February 2013)
 > Python 3.4.0a2 + stdlib 14.08.0a2  (~August 2013)
 > Python 3.4.0a3 + stdlib 14.08.0a3  (~February 2014)

and

 > the stdlib feature development branch
 > Python 3.3.1 + stdlib 13.02.0  (~February 2013)
 > Python 3.3.2 + stdlib 13.08.0  (~August 2013)
 > Python 3.3.3 + stdlib 14.02.0  (~February 2014) (only upgrade path

because 14.08.0a* will be targeting 3.4, and *should* use new language
constructs and APIs where they are appropriate, while 13.02.0 ...
14.02.0 will be targeting the 3.3 API, and mustn't use them.