Comments on: Upgrading to Snow Leopard Part 1: Python

By: Woshiadai Dev Notebook :: upgrading to snow leopard :: October :: 2009

Woshiadai Dev Notebook :: upgrading to snow leopard :: October :: 2009 — Sat, 31 Oct 2009 20:20:49 +0000

[...] This blog also covers "Upgrading to Snow Leopard Part 1 to 7", talking about python, mysql and other upgrade tips, very handy! He also talks about building 32 bit packages using arch [...]

By: chanita

chanita — Wed, 21 Oct 2009 06:07:51 +0000

Chaiwat help me out and wrote on his blog:

http://proteus-tech.com/blog/cwt/install-pil-in-snow-leopard/

By: g

Tue, 20 Oct 2009 14:03:27 +0000

me too :(

“The _imaging C module is not installed”

anyone got any suggestions?

By: Chanita

Chanita — Wed, 14 Oct 2009 13:27:16 +0000

I also get “The _imaging C module is not installed” problem.

By: clark

clark — Mon, 14 Sep 2009 17:36:04 +0000

I got it installed fine. I just couldn’t get programs like iPython to recognize it. Did you get iPython to use it?

By: Chester Kwok

Chester Kwok — Sat, 12 Sep 2009 13:25:38 +0000

Finally got readline to install on snow leopard.

I used the -editable command on easy_install and then commented out the first four lines in readline/rl/build.sh and it worked.

By: Ryan

Ryan — Wed, 09 Sep 2009 04:46:29 +0000

I’m have the exact same issue with PIL.

By: Clark

Clark — Wed, 09 Sep 2009 04:16:39 +0000

It’s looking to me like some aspects of Python just aren’t ready quite ready for prime time. Keeping Python2.5 around from your backup disk has been working for me. But it definitely is frustrating.

It seems to me that the issues with uname are the cause of some problems (since OSX has a 32 bit kernel but is a 64 bit OS)

I suspect some of these problems may take a few weeks to work out unfortunately.

By: Sarp Erdag

Sarp Erdag — Tue, 08 Sep 2009 19:20:10 +0000

Hello, I also installed PIL without problems but the _imaging c library is giving me trouble. Anyone tried importing it in the python shell?

In my apps I get this error:
The _imaging C module is not installed

And over the shell:

Python 2.6.1 (r261:67515, Jul 7 2009, 23:51:51)
[GCC 4.2.1 (Apple Inc. build 5646)] on darwin
Type “help”, “copyright”, “credits” or “license” for more information.
>>> from PIL import image
Traceback (most recent call last):
File “”, line 1, in
ImportError: cannot import name image
>>> from PIL import Image
>>> import _imaging
Traceback (most recent call last):
File “”, line 1, in
ImportError: dlopen(/Library/Python/2.6/site-packages/PIL/_imaging.so, 2): Symbol not found: _jpeg_resync_to_restart
Referenced from: /Library/Python/2.6/site-packages/PIL/_imaging.so
Expected in: flat namespace
in /Library/Python/2.6/site-packages/PIL/_imaging.so
>>>

By: clark

clark — Fri, 04 Sep 2009 22:06:46 +0000

I did some poking around and I thought it had installed when it hadn’t and iPython was using Apple’s hack to emulate readline.

I downloading readline the following way.

wget ftp://ftp.cwru.edu/pub/bash/readline-6.0.tar.gz
tar -xvzf readline-6.0.tar.gz
cd readline-6.0
./configure
make
sudo make install

However I’m having trouble convincing iPython to use readline rather than libedit.

By: Snow Leopard Smooth Except Python 32/64 Cocktail // Evolving Bits

Snow Leopard Smooth Except Python 32/64 Cocktail // Evolving Bits — Fri, 04 Sep 2009 07:33:01 +0000

[...] Note that these details are for a fresh Snow Leopard install – there are a different set of issues if you’re upgrading over your existing Leopard. NEW: “Clark’s Tech Blog” has a nice write-up about upgrading Python after upgrading Leopard to Snow Leopard. [...]

By: Zane Selvans

Zane Selvans — Fri, 04 Sep 2009 06:19:25 +0000

Unfortunately the readline that comes from easy_install seems to be hard-coded to work with Python 2.5.1 from OS X 10.5, and fails to figure out that the architecture has changed for 10.6. However, I was able to download it with –editable and force it to build i386 and x86_64 libraries, and then create the egg, and it seems to be working okay now… finally!

By: clark

clark — Fri, 04 Sep 2009 03:46:42 +0000

No. None at all. I can’t even recall what I did. I think one of the easy_installs I did also installed readln but I can’t recall which. Try doing an easy_install on iPython and see if that works for you.

By: Zane Selvans

Zane Selvans — Fri, 04 Sep 2009 03:43:16 +0000

Did you have any issues getting readline to work with iPython? It is stubbornly refusing for me. Gah.

By: clark

clark — Wed, 02 Sep 2009 17:04:38 +0000

OK, sorry, I confused PIL (Python Imaging Library) with py-pip which is the easy_install alternative.

I downloaded Pip and tried installing a few packages with it. It actually found pil but had errors with it. So I don’t think Pip is quite ready for prime time. (The errors were related to pip itself and not the pil library)