Python Imaging Library and JPEG Files

There are so many posts on the web covering how to get the Python Imaging Library (PIL) to work on Linux, and they almost all say the same thing: install libjpeg6.2 and then recompile/install PIL.

What most fail to mention is that one apparently needs to also remove the previous PIL install before reinstalling. I don’t know (and don’t care to research it), but I think that the install sees the already compiled code and skips that step. Wonder if there is an option that forces new compiles.

So, find wherever your distribution stores the Python site-packages/dist-packages and remove the PIL directory and PIL.pth file before running install. Just to be thorough (and maybe a little anal retentive), I also removed the unpacked directory of PIL source.

Also, and this is the BIG PIECE OF NEWS to me, for those using Ubuntu 11.04 like me, libjpeg6.2 won’t work. Instead, use libjpeg8. In the Synaptic Package Manager, a quick search for libjpeg will show both versions. Leave libjpeg6.2 alone, but be sure to remove any dev libraries for that version. Then, mark anything that looks remotely connected to libjpeg8 and apply.

Now that your old version of PIL is gone, and the libs are squared away, it is time to install PIL. I used version 1.1.7. Finally, success!

(Well, except that I seem to have not installed the library that enables PNG use. Some other day maybe.)

To enable PNG support in Ubuntu 11.04, use these commands to find the zlib library BEFORE installing PIL:

$ cd /usr/lib
$ sudo ln -s i386-linux-gnu/

Using version 12.04 of Ubuntu, I also had to create a symbolic link for libjpeg – AFTER following the instructions above and BEFORE installing PIL:

$sudo ln -s i386-linux-gnu/