My notes from the "2 to 3 porting" session of Python Language Summit at
PyCon. There were some agreements in this session that people wanted
recorded. Happy to provide clarification in my notes aren't clear.
----
## python 2 to 3 migration
- 2to3 distutils flag (part of install or sdist)
- 2to3 is slow: lots of room for speedup (esp. on the matching)
- 3to2
- good, wanted, needed: esp. by module authors
- brett: volunteers? silence. Benjamin? Google SOC. Jesse volunteered to
mentor.
- decision: want to look into it
- Want target compat 2.x (which "x"). Can be done by selecting
appropriate
fixers.
- some discussion of dict views, etc.
- 2.x branch:
- decision: 18 to 24 month btwn releases.
- decision: 2.7 (2.6?) *might* be the end of the 2.x line.
- 3.1:
- in alpha now
- a2 during the sprints (Brett channeling Benjamin)
- MvL still has a couple PEPs he wants to propose
- Jython: considering targetting 3.2 next, *then* maybe 2.7
- 3.1 will be the one exception to 18-24 mos.
- on "18-24 mo": start a release date PEP with a feature freeze date
stake in
the ground when the prev ver is released
- 3.0: special case, not doing 5 years of security releases...
- hence 3.1 being released soon
- linux distro guys are fine with that
- extension docs for porting still missing:
- brett: Benjamin has a draft
- PortingToPy3k in the wiki
- Gerhard: doing it against svn
- the other Python implementations: what ver to target
- depends on their audiences
- Jython leaning on the latest 3
- IronPython doesn't want a moving target
- skip 3.0 and go for 3.1
- python2 & python3 binaries:
- make install should do it
- "python3" for new and forever
- or "python2" for Python 2.x release? Thomas: bad idea because usage of
"python2" in the shebang line will only work on newer systems
----
Trent
--
Trent Mick
trentm at gmail.com
trentm at activestate.com
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