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Archives For September 2010

Using ToscaWidgets with repoze.bfg

September 28, 2010

ToscaWidgets is a really handy python form framework that saves lots of typing when it comes to creating forms. I decided to use it for my BiosImg project to get a feel for things, but I ran into a small problem.

Even after I had enabled the tosca middleware, it still wanted to use genshi rendering. This is a problem because I want to use mako for the project and having two template libraries would be pointless.

After some help from twillis and mcdonc in the freenode #repoze channel, I was given the solution. I promised to blog it to help others with the same problem, so here’s the relevant part of the ini file.

[pipeline:main]
pipeline =
egg:Paste#evalerror
tosca
egg:repoze.tm2#tm
sql

[filter:tosca]
use = egg:toscawidgets#middleware
toscawidgets.framework.default_view = mako
stack_registry=True

As always, please be sure to comment if this was helpful to you. Also feel free to suggest any fixes/updates that may be needed.

In Programming
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Blender 2.53 Beta on Fedora

September 6, 2010

Running Blender on Fedora 13 runs into a small problem which probably exists with some other Linux distributions. The error is as follows:

./blender: symbol lookup error: ./blender: undefined symbol: gzopen64

As far as I know, this is not a problem on Ubuntu because the zlib package for Ubuntu is compiled with gzopen64, or so I’ve gathered from several searches.

The fix for this bug is thankfully rather simple however a few hours searching didn’t really find any solutions so I wanted to write this up and share the solution.

You’re going to need to compile zlib. In my case, I found ubuntu’s zlib source tarball did the trick just fine. Just type this into your terminal.

wget -c http://archive.ubuntu.com/ubuntu/pool/main/z/zlib/zlib_1.2.3.3.dfsg.orig.tar.gz

Extract it and cd to the directory. Then compile and make it as follows.

./configure
make

Note that you may have to install some extra packages. I’m not sure what these are because I already have a ton of development packages installed butit should be pretty easy to figure out.

Now you’ll need to prefix the patch to your zlib install to your blender launch command. This will vary depending on where you have blender and zlib. Here’s mine for an example:

LD_LIBRARY_PATH=/home/william/.applications/zlib-1.2.3.3.dfsg/ /home/william/.applications/blender-2.53-beta-linux-glibc27-i686/blender

If this has solved your problem, please let me know in the comments below. If it doesn’t work out or if you have any suggestions/tips for the article, I’d love to hear them.

In Tip
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