Python 3.2 Required

[timolson]

$ python --version
Python 2.7.9
$ pip --version
pip 7.1.2 from /Users/tim/assembly/lib/python2.7/site-packages (python 2.7)
$ pip install waliki[all]
  […elided…]
  Hovercraft requires Python 3.2 or higher.

  ----------------------------------------
  Failed building wheel for hovercraft

Seems like there is a transitive dependency on Hovercraft, whose latest version requires Python >= 3.2. We are trying to run Waliki on 2.7. Any ideas? Is there a specific version number for Hovercraft which is the upper bound for 2.7 support?

[mgaitan]

hi tim, yeah, we should considered this a bug, because hovercraft is "python 3 only" and waliki is not.

however, hovercraft is only mandatory for the 'slides' plugin. if you disable it (comment/remove 'waliki.slides' from your INSTALLED_APPS, you can move forward with 2.7 .

if you still need a "slides" plugin that works on 2.7 and 3+, check the current one which is pretty simple to hack on using an alternative tool like rst2html5. And please, share that back as a pull request.

[timolson]

Removing it from INSTALLED_APPS is easy, but how to get the rest of waliki installed through pip? pip install waliki works but doesn't seem to install necessary modules like rst2pdf and sendfile. pip install waliki[all] obviously doesn't work because of the original error about Python 3.2. The requirements.txt files in the project don't seem to list everything, or the requirements are implicit, transitive dependencies. Right now I've added pip install rst2pdf but Waliki is still breaking with No module named sendfile. There are several options:

pysendfile               - A Python interface to sendfile(2)
django-xsendfile         - A Django application to serve files using xsendfile
xsendfile                - X-Sendfile implementation in Python/WSGI
py-sendfile              - A Python interface to sendfile(2)
xsendfile_middleware     - WSGI middleware to send files using X-Accel-
                           Redirect
django-sendfile          - Abstraction to offload file uploads to web-server
                           (e.g. Apache with mod_xsendfile) once Django has
                           checked permissions etc.

Which of these are you using? What other dependencies are there? Can you make a requirements.txt that works with Python 2.x?

[mgaitan]

if you check what are the requirement declared when you install waliki[all], (https://github.com/mgaitan/waliki/blob/master/setup.py#L28-L38) you'll note its a set of all the others

so, try install them explicitly:

pip install waliki micawber markdown django-sendfile rst2pdf

[timolson]

Thanks… It almost works now.

If I have the waliki.pdf app enabled, I still get the following error:

cannot import name rst2pdf
In file waliki/pdf/views.py:
from sh import rst2pdf

I have definitely installed rst2pdf, version rst2pdf-0.93.dev-r0 but what is the sh module?

[timolson]

Disabling the waliki.pdf app avoids the issue, but I'd like to figure out the module dependency.

[RobertoMaurizzi]

from the name of it, it's trying to import a shell command called rst2pdf. I'd guess that command isn't available (not on path for the user executing Django) so you get an import error. From the docs: http://waliki.readthedocs.org/en/latest/get_as_pdf.html?highlight=rst2pdf