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<dt><a href="/updating-eurolovemap.html">Updating EuroLoveMap</a></dt>
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<a href="remove-git-files-with-globbing.html"><span class="previouspost"><i class="icon-chevron-sign-left"></i> Remove git files with globbing</a></span>
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<span class='nextpost'><a href="/publishing-in-pypi.html">Publishing in PyPi <i class="icon-chevron-sign-right"></i></span></a>
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<h2 class="title">Updating EuroLoveMap</h2>
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<span class="meta date">2014-03-27</span>
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<a class="tag" href="/tag/javascript.html"><span class="label label-default">javascript</span></a>
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<a class="tag" href="/tag/python.html"><span class="label label-default">python</span></a>
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</div>
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<div class="post">
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<p>As part of the <a class="reference external" href="http://www.opener-project.org/2013/07/18/opener-hackathon-in-amsterdam/">OpeNER
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hackathon</a>
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we decided to build a prototype that would allow us to compare how
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different countries feel about several topics. We used the OpeNER
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pipeline to get the sentiment from a set of newspaper articles we
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gathered from media in several languages. Then we aggregated those
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articles by category and country (using the source of the article or the
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language it was written in), obtaining the "overall feeling" of each
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country about each topic. Then, we used some fancy JavaScript to make
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sense out of the raw information.</p>
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<p>It didn't go too bad, it turns out <a class="reference external" href="http://eurosentiment.eu/wp-content/uploads/2013/07/BOLv9qnCIAAJEek.jpg">we
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won</a>.</p>
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<p>Now, it was time for a face-lift. I used this opportunity to play with
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new technologies and improve it:</p>
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<ul class="simple">
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<li>Using Flask, this time using python 3.3 and Bootstrap 3.0</li>
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<li>Cool HTML5+JS cards (thanks to
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<a class="reference external" href="http://pastetophone.com">pastetophone</a>)</li>
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<li>Automatic generation of fake personal data to test the interface</li>
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<li>Obfuscation of personal emails</li>
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</ul>
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<p>The result can be <a class="reference external" href="http://eurolovemap.herokuapp.com/">seen here</a>.</p>
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<div class="section" id="publishing-a-python-3-app-on-heroku">
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<h2>Publishing a Python 3 app on Heroku</h2>
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<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre>1</pre></div></td><td class="code"><div class="highlight"><pre>mkvirtualenv -p /usr/bin/python3.3 eurolovemap
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</pre></div>
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</td></tr></table><p>Since Heroku uses python 2.7 by default, we have to tell it which
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version we want, although it supports python 3.4 as well. I couldn't get
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python 3.4 working using the
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<a class="reference external" href="https://launchpad.net/~fkrull/+archive/deadsnakes">deadsnakes</a> ppa,
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so I used python 3.3 instead, which works fine but is not officially
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supported. Just create a file named <em>runtime.txt</em> in your project root,
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with the python version you want to use:</p>
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<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre>1</pre></div></td><td class="code"><div class="highlight"><pre>python-3.3.1
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</pre></div>
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</td></tr></table><p>Don't forget to freeze your dependencies so Heroku can install them:
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<tt class="docutils literal">bash pip freze > requirements.txt</tt></p>
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</div>
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<div class="section" id="publishing-personal-emails">
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<h2>Publishing personal emails</h2>
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<p>There are really sophisticated and effective ways to obfuscate personal
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emails so that spammers cannot easily grab yours. However, this time I
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needed something really simple to hide our emails from the simplest form
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of crawlers. Most of the team are in academia somehow, so in the end all
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our emails are available in sites like Google Scholar. Anyway, nobody
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likes getting spammed so I settled for a custom <a class="reference external" href="http://en.wikipedia.org/wiki/Caesar_cipher">Caesar
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cipher</a>. Please, don't
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use it for any serious application if you are concerned about being
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spammed.</p>
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<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre>1
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2</pre></div></td><td class="code"><div class="highlight"><pre><span class="k">def</span> <span class="nf">blur_email</span><span class="p">(</span><span class="n">email</span><span class="p">):</span>
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<span class="k">return</span> <span class="s">""</span><span class="o">.</span><span class="n">join</span><span class="p">([</span><span class="nb">chr</span><span class="p">(</span><span class="nb">ord</span><span class="p">(</span><span class="n">i</span><span class="p">)</span><span class="o">+</span><span class="mi">5</span><span class="p">)</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">email</span><span class="p">])</span>
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</pre></div>
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</td></tr></table><p>And this is the client side:</p>
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<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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11
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12</pre></div></td><td class="code"><div class="highlight"><pre><span class="nb">window</span><span class="p">.</span><span class="nx">onload</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(){</span>
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<span class="nx">elems</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">getElementsByClassName</span><span class="p">(</span><span class="s1">'profile-email'</span><span class="p">);</span>
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<span class="k">for</span><span class="p">(</span><span class="kd">var</span> <span class="nx">e</span> <span class="k">in</span> <span class="nx">elems</span><span class="p">){</span>
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<span class="kd">var</span> <span class="nx">blur</span> <span class="o">=</span> <span class="nx">elems</span><span class="p">[</span><span class="nx">e</span><span class="p">].</span><span class="nx">innerHTML</span><span class="p">;</span>
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<span class="kd">var</span> <span class="nx">email</span> <span class="o">=</span> <span class="s2">""</span><span class="p">;</span>
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<span class="k">for</span><span class="p">(</span><span class="kd">var</span> <span class="nx">s</span> <span class="k">in</span> <span class="nx">blur</span><span class="p">){</span>
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<span class="kd">var</span> <span class="nx">a</span> <span class="o">=</span> <span class="nx">blur</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">s</span><span class="p">)</span>
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<span class="nx">email</span> <span class="o">=</span> <span class="nx">email</span><span class="o">+</span><span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">a</span><span class="o">-</span><span class="mi">5</span><span class="p">);</span>
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<span class="p">}</span>
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<span class="nx">elems</span><span class="p">[</span><span class="nx">e</span><span class="p">].</span><span class="nx">innerHTML</span> <span class="o">=</span> <span class="nx">email</span><span class="p">;</span>
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<span class="p">}</span>
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<span class="p">}</span>
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</pre></div>
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</td></tr></table><p>Unfortunately, this approach does not hide your email from anyone using
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<a class="reference external" href="http://phantomjs.org/">PhantomJS</a>,
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<a class="reference external" href="http://zombie.labnotes.org/">ZombieJS</a> or similar. For that, other
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approaches like generating a picture with the address would be
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necessary. Nevertheless, it is overkill for a really simple ad-hoc
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application with custom formatting and just a bunch of emails that would
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easily be grabbed manually.</p>
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</div>
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<div class="section" id="generation-of-fake-data">
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<h2>Generation of fake data</h2>
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<p>To test the contact section of the site, I wanted to populate it with
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fake data. <a class="reference external" href="https://github.com/joke2k/faker">Fake-Factory</a> is an
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amazing library that can generate fake data of almost any kind: emails,
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association names, acronyms... It even lets you localise the results
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(get Spanish names, for instance) and generate factories for certain
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classes (à la Django).</p>
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<p>But I also wanted pictures, enter <a class="reference external" href="http://lorempixel.com/">Lorem
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Pixel</a>. With its API you can generate
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pictures of almost any size, for different topics (e.g. nightlife,
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people) and with a custom text. You can even use an index, so it will
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always show the same picture.</p>
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<p>For instance, the picture below is served through Lorem Pixel.</p>
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<div class="figure">
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<img alt="This picture is generated with LoremIpsum" src="http://lorempixel.com/400/200/nightlife/" />
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</div>
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<p>By the way, if you only want cat pictures, take a look at
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<a class="reference external" href="http://placekitten.com/">Placekitten</a>. And for NSFW text, there's
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the <a class="reference external" href="http://slipsum.com/">Samuel L. Jackson Ipsum</a></p>
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</div>
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