How do I create a Python pypi package with a C library?

Question

I would like to put the IP2Location Python library on a local Pypi / Cheeseshop server that I have running, so that I can use buildout to automatically include it in a project.

First, I tested out the library by installing it the way that is explained in IP2Location's (terse) documentation: 1) Download the IP2Location C library and compile it 2) Run python setup.py build && python setup.py install in the IP2Location Python library.

I got that working, so then I tried to upload the Python library to my local pypi server by running:

python setup.py register -r local sdist upload -r local

It uploaded a package to my local pypi server, but the package only contained the Python part of the library, not the C part. I'd like the C library to also be included and then automatically compiled when a tool like buildout downloads it from my local pypi server.

I'm pretty new to pypi. Is what I'm trying to do even possible? If so, how?

Thanks, Scott

ggozad · Accepted Answer · 2012-04-10 16:49:18Z

Unfortunately no, at least not the way setup.py is structured in the python library. You might have some luck getting repeatability by trying the following though (note that I have not tried this, IP2Location is a proprietary library):

Build the C library in your buildout by means of zc.recipe.cmmi. A section similar to the following should do the job.

[iplocationc]
recipe = zc.recipe.cmmi
url = http://www.ip2location.com/downloads/ip2location-c-4.0.2.tar.gz

Then, install the python counterpart as an egg using zc.recipe.egg:

[iplocation]
recipe = zc.recipe.egg:custom
eggs = iplocation
include-dirs = ${buildout:directory}/parts/iplocationc/includes_dir_goes_here
rpath = ${buildout:directory}/parts/iplocationc/libs_dir_location_goes_here

You might have to modify the recipe parameters a bit and probably fiddle with the setup.py but hopefully this should do it.

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