You need to install the C++ Cap’n Proto library first. It requires a C++ compiler with C++11 support, such as GCC 4.7+ or Clang 3.2+. Follow installation docs at http://kentonv.github.io/capnproto/install.html, or if you’re feeling lazy, you can run the commands below:
curl -O http://capnproto.org/capnproto-c++-0.5.0.tar.gz
tar zxf capnproto-c++-0.5.0.tar.gz
cd capnproto-c++-0.5.0
./configure
make -j6 check
sudo make install
Using pip is by far the easiest way to install the library. After you’ve installed the C++ library, all you need to run is:
[sudo] pip install -U cython
[sudo] pip install -U setuptools
[sudo] pip install pycapnp
On some systems you will have to install Python’s headers before doing any of this. For Debian/Ubuntu, this is:
sudo apt-get install python-dev
You can control what compiler is used with the environment variable CC, ie. CC=gcc-4.8 pip install pycapnp, and flags with CFLAGS. You only need to run the setuptools line if you have a setuptools older than v0.8.0, and the cython line if you have a version older than v0.19.1.
If you want the latest development version, you can clone the github repo and install like so:
git clone https://github.com/jparyani/pycapnp.git
pip install ./pycapnp
or:
cd pycapnp
python setup.py install
Clone the repo from https://github.com/jparyani/pycapnp.git and use the develop branch. I’ll probably ask you to redo pull requests that target master and aren’t easily mergable to develop:
git clone https://github.com/jparyani/pycapnp.git
git checkout develop
Testing is done through pytest, like so:
pip install pytest
py.test
Once you’re done installing, take a look at the Quickstart