Wordcloud worker

[flavioamieiro]

This adds the new wordcloud worker. The worker generates a wordcloud and saves PNG encoded in base64 to the storage.

Please also merge NAMD/pypln-deploy#17 so the deploy process doesn't break this in production.

[turicas]

Currently I have some problems to run this:

• Needs to execute pip install Cython before pip install -r requirements/production.txt (it's a pip problem, not our);
• I have DejaVuSans font installed on my GNU/Linux distribution but it is not located at /usr/share/fonts/TTF/DejaVuSans.ttf. Is there any other way to retrieve font filename? A possible solution is to share this file with pypln.backend;
• Getting ImportError: The _imagingft C module is not installed from PIL/ImageFont.py. To solve this problem I needed to install libfreetype6-dev and then pip uninstall PIllow; pip install Pillow (we should add this to README or something like this).

[flavioamieiro]

6772a4e updates the README with this information (I didn't know about the libfreetype headers).

I couldn't find a well documented way of finding the font file in python. I even changed the default font in my fork (in the original project they use DroidSansMono) to use a more popular font, but that's not enough. I'll try to find a way of finding this font files that do not involve us having to write (and maintain) a font-finding routine.

[turicas]

One way of finding system fonts is using matplotlib's font manager:

import matplotlib.font_manager
print(matplotlib.font_manager.findSystemFonts(fontpaths=None, fontext='ttf'))

As matplotlib is not a dependency, we may "cherry pick" font finding function from font_manager.py.

[fccoelho]

Looks like a good idea!

On Tue, Feb 11, 2014 at 6:15 AM, Álvaro Justen [email protected]:

One way of finding system fonts is using matplotlib's font manager:

import matplotlib.font_manager
print(matplotlib.font_manager.findSystemFonts(fontpaths=None, fontext='ttf'))

As matplotlib is not a dependency, we may "cherry pick" font finding
function from font_manager.pyhttps://github.com/matplotlib/matplotlib/blob/master/lib/matplotlib/font_manager.py
.

Reply to this email directly or view it on GitHubhttps://github.com//pull/164#issuecomment-34733781
.

Flávio Codeço Coelho

+55(21) 3799-5551
Professor
Escola de Matemática Aplicada
Fundação Getulio Vargas
Praia de Botafogo, 190 sala 312
Rio de Janeiro - RJ
22250-900
Brasil

[flavioamieiro]

I saw this. I didn't want to use it because matplotlib was not a dependency (and I didn't want to include it as such only for this) but I'll look into getting the code directly from font_manager.py.

Just one question: is it OK if I ignore all the code for other platforms (since pypln is only supposed to run on GNU/linux anyway)?

[fccoelho]

I think so, we don't have the resources to maintain it for more than one
platform.

On Tue, Feb 11, 2014 at 10:33 AM, Flávio Amieiro
[email protected]:

I saw this. I didn't want to use it because matplotlib was not a
dependency (and I didn't want to include it as such only for this) but I'll
look into getting the code directly from font_manager.py.

Just one question: is it OK if I ignore all the code for other platforms
(since pypln is only supposed to run on GNU/linux anyway)?

Reply to this email directly or view it on GitHubhttps://github.com//pull/164#issuecomment-34749916
.

Flávio Codeço Coelho

+55(21) 3799-5551
Professor
Escola de Matemática Aplicada
Fundação Getulio Vargas
Praia de Botafogo, 190 sala 312
Rio de Janeiro - RJ
22250-900
Brasil

[turicas]

Actually I think we should only provide official support for Debian/Ubuntu distributions.

[flavioamieiro]

I've tried to bring the code from matplotlib's font manager and it does seems doable, but it will involve bringing in a lot of code (from more than just the font_manager module). This does not sound as good as it first did.

Since we're OK (at least me and @turicas are) with supporting debian/ubuntu, I'll document that you need the fonts-dejavu package, which installs the font in /usr/share/fonts/truetype/dejavu/DejaVuSans.ttf and change the wordcloud script to use that path.

[flavioamieiro]

flavioamieiro/word_cloud@0af954970