Odd install behavior

[diamondman]

When I installed this library for python3, the package downloaded, then pip ran at 100% cpu for almost 2 minutes with no output before finishing the install.

Collecting pymspack
  Downloading pymspack-0.1.1.tar.gz (62kB)
    100% |████████████████████████████████| 71kB 2.2MB/s 
<2 minutes of super high CPU use>
Installing collected packages: pymspack
  Running setup.py install for pymspack ... done
Successfully installed pymspack-0.1.1

After the install, I can not import pymsunpack, there is no /usr/local/lib/python3.5/dist-packages/pymspack folder, and only a pymspack-0.1.1-py3.5.egg-info/ folder. The enclosed installed-files.txt lists only.

top_level.txt
PKG-INFO
dependency_links.txt
SOURCES.txt
not-zip-safe

This happens if no matter if I have the apt-package libmspack0 (with -dev) installed or not.

[gcrahay]

There were an issue with Python 3 version of this package in version 0.1.1.

I uploaded a new version (0.2) to Pypi, with precompiled packages for Linux amd64 with Python 2.7 and 3.5. To build the Python extension from the source distribution you will need Cython.

[diamondman]

Thanks for working on this. I tried installing the package, and now I get this:

$ sudo -H pip install pymspack
Collecting pymspack
Downloading pymspack-0.2.0.tar.gz (67kB)
100% |████████████████████████████████| 71kB 2.0MB/s
No files/directories in /tmp/pip-build-z_857qs1/pymspack/pip-egg-info (from PKG-INFO)

$ pip --version
pip 9.0.1 from /usr/local/lib/python3.5/dist-packages (python 3.5)

I also get this behavior in a python 3 fresh virtual env.

[diamondman]

Oh. Cython, not CPython, that explains whe pxd and pyd files that were unfamiliar to me. But with that correction, I think my issue is still relevant.

[gcrahay]

In a python 3 fresh virtualenv, with Cython installed, I can't reproduce:

# virtualenv --python=python3.5 env
# . env/bin/activate
(env) # pip install cython
(env) # pip install pymspack
(env) # python
>>> import pymspack
>>> pymspack.ext.__version__
'0.2.0'
>>> 

[diamondman]

Installing Cython did fix the issue. I see you have cython listed as a dependency. But it appears that the wrong directive is used.
https://packaging.python.org/requirements/
https://github.com/gcrahay/pymspack/blob/master/setup.py#L43

setup_requires vs install_requires.
I will make a PR for this.

[diamondman]

I read the setup file more and see you use it for setup, so that is the correct directive. For some reason, Cython was not being automatically fetched when I tried to do the setup. From pip I did not even see your message about requiring Cython (from setup.py). Is there a way to ease the install?

[gcrahay]

I didn't found any way to ease the install. Maybe raise an Exception when Cython is not found?