Python 2.7 released

http://www.python.org/download/releases/2.7

by cool-RR • 16 years ago

152 39 16 years ago

python.org

uggedal• 16 years ago

The obligatory What's New in Python 2.7 document: http://docs.python.org/dev/whatsnew/2.7.html

barnaby• 16 years ago

Looks like a nice batch of new features added.

jvdh• 16 years ago

Link is broken now, should be: http://docs.python.org/whatsnew/2.7.html

(Which is actually from the future! "Python 2.7 was released on July 7, 2010.")

j_baker• 16 years ago

I'm disappointed that distutils2 didn't make it in this release. Does that mean it won't be in the standard library until the 3.x series?

kingkilr• 16 years ago

That's correct. This was a decision made at the language summit at PyCon 2010.

jnoller• 16 years ago

It simply was not going to be ready - and with the amount of churn and changes going on in that space, it was felt that the community would be better served with something stable, later (but still install-able via pip/etc) then something unstable and still cooking.

simonista• 16 years ago

I'm confused by why the python 2.x branch is still being actively developed with new features rather than just being maintained for bug fixes. What are the roadmaps and goals of the 2.x verses the 3.x branches?

xi• 16 years ago

2.7 is the last major release of the 2.x series. The goal was to ease transition to 3.x by backporting some of the features and provide a stable base for people unable or unwilling to jump to 3.x.

mkramlich2• 16 years ago

if you read the release notes and related material you would have found the answer to that question pretty quickly ;)

AaronMT• 16 years ago

How does one go about updating Python on OSX Snow Leopard?

watmough• 16 years ago

There's a useful page here:

http://www.python.org/download/mac/

Basically, since the OS X Python is usually a bit behind, you are recommended to get the full install package.

babo• 16 years ago

Compiled from source and using it from a separate folder it's fine for me. Also added easy_install from source and used that to install a few libraries like boto, readline, ipython, etc. without a problem.

rbanffy4• 16 years ago

You can also use ports. I assume it will have a 2.7 port shortly, if it doesn't already.

ant57• 16 years ago

Looks like 2.7rc2 is in the repository. If you don't want to wait for the maintainer, you can:

  sudo port edit python27

This will use your $EDITOR (mine is vi, yours might be textmate). Change the version from 2.7rc2 to 2.7:

  version 2.7

and set the checksum value to:

  sha1 6bbcd1ab16d07765a7a405671e1e43a2e74b8e6a

Then simply:

  sudo port install python27

Boom. You can make it the default 'python' (if /opt/local/bin comes first in your path) via:

  sudo port install python_select
  sudo python_select python27
  python --version
    Python 2.7

The next 'port sync' will override your local portfile changes. If you want to keep them, you can also copy the port somewhere else, or even set up your own local tree of port files. ('port dir python27' to get the path to the port for copying).

Also, if you fail to update the checksum, port(1) will tell you what it should be (which is how I got the line to use above).

telemachos3• 16 years ago

I wouldn't recommend overwriting OSX's Python. You can install yourself from source into /usr/local, but a package manager like MacPorts or Homebrew helps a lot. It's a little more work up front - to install the package manager - but it pays itself back over time. Homebrew has 2.6.5 in its main branch, and 2.7 in a fork. See the notes here:

http://github.com/mxcl/homebrew/blob/master/Library/Formula/...

I've tried Fink, MacPorts, Rudix and Homebrew. Homebrew isn't perfect, but it's damn good.

ant57• 16 years ago

I'm not sure what makes Homebrew better than MacPorts. Most of their self-declared advantages -- the largest one being that they don't replicate OS-provided software -- are going to fall over as soon as the software included with Snow Leopard starts getting a bit stale.

Case in point, Snow Leopard ships with Python 2.6, and now people are going to want 2.7.

[Edit]

I think it's also enlightening to look at this breakdown of the advertised homebrew features circa last year:

http://news.ycombinator.com/item?id=872072

jdbeast00• 16 years ago

i am a new mac user (and new to *nix in general). i was trying to get mapnik with postgres working on my mac yesterday and it took me 5 hours to get macports / mapnik setup, and after most of my day was done it turns out that ImageMagick via macports and snow leopard don't mix. (Finally I tried downloading the binary for ImageMagick but then macports doesn't recognize it..) Very frustrating. Is there really nothing better, or am i just too much of a noob? What is the reason for making me build it instead of doing soemthing like apt-get on ubuntu?

nuxi• 16 years ago

But you don't overwrite OSX's python, the new version is installed side-by-side. The installation also creates links to the new version into /usr/local/bin, so that it doesn't mess up the system's python. Never had any trouble with this.

tomjen3• 16 years ago

Did they remove the global interpreter lock?

And if not, how can the language be used for high concurrency (ala Facebooks tornado).

troutwine2• 16 years ago

In short: epoll. Network IO bound servers need only deal with sockets that have some event ready. Unless I'm mistaken, Tornado isn't written to be highly concurrent, it is, rather, quite asynchronous: they make it very simple to deal with IO only when there is data to process. You _can_ block the whole process with a long lived handler.

rbanffy4• 16 years ago

> You _can_ block the whole process with a long lived handler.

Or you could handle the event out-of-process.

frognibble• 16 years ago

Tornado achieves concurrency using async network IO and multiple instances per core.

tomazmuraus• 16 years ago

Great, now we finally have long awaited ordered dictionary in 2.x branch as well :)

inferno0069• 16 years ago

Unfortunately they have non-transitive equality when used with standard dictionaries. For example, if O and R are ordered dictionaries with the same entries in different orders, and D is a standard dictionary with the same entries, then O == D == R but O != R.

Python 2.7 released

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