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  <section id="introducing-python-3-support">
<h1>Introducing Python 3 support<a class="headerlink" href="#introducing-python-3-support" title="Permalink to this heading">¶</a></h1>
<aside class="sidebar">
<p class="sidebar-title">Python 2.7 to 3 upgrade</p>
<p>This chapter exists of historical reasons.  Python 2.7 release schedule ends
(<a class="reference external" href="https://pythonclock.org/">Python 2.7 clock</a>) after 11 years Python 3 exists</p>
</aside>
<p>As most operation systems are coming with Python3 installed by default. So it is
time for searx to support Python3.  But don’t worry support of Python2.7 won’t be
dropped.</p>
<a class="reference internal image-reference" href="../_images/searxpy3.png"><img alt="hurray" class="align-center" src="../_images/searxpy3.png" style="width: 510.5px; height: 116.0px;" /></a>
<section id="how-to-run-searx-using-python-3">
<h2>How to run searx using Python 3<a class="headerlink" href="#how-to-run-searx-using-python-3" title="Permalink to this heading">¶</a></h2>
<p>Please make sure that you run at least Python 3.5.</p>
<p>To run searx, first a Python3 virtualenv should be created.  After entering the
virtualenv, dependencies must be installed. Then run searx with python3 instead
of the usual python command.</p>
<div class="highlight-sh notranslate"><div class="highlight"><pre><span></span>virtualenv -p python3 venv3
<span class="nb">source</span> venv3/bin/activate
pip3 install -r requirements.txt
python3 searx/webapp.py
</pre></div>
</div>
<p>If you want to run searx using Python2.7, you don’t have to do anything
differently as before.</p>
</section>
<section id="fun-facts">
<h2>Fun facts<a class="headerlink" href="#fun-facts" title="Permalink to this heading">¶</a></h2>
<ul class="simple">
<li><p>115 files were changed when implementing the support for both Python versions.</p></li>
<li><p>All of the dependencies was compatible except for the robotframework used for
browser tests.  Thus, these tests were migrated to splinter. So from now on
both versions are being tested on Travis and can be tested locally.</p></li>
</ul>
</section>
<section id="if-you-found-bugs">
<h2>If you found bugs<a class="headerlink" href="#if-you-found-bugs" title="Permalink to this heading">¶</a></h2>
<p>Please open an issue on <a class="reference external" href="https://github.com/searx/searx/issues">GitHub</a>.  Make sure that you mention your Python
version in your issue, so we can investigate it properly.</p>
</section>
<section id="acknowledgment">
<h2>Acknowledgment<a class="headerlink" href="#acknowledgment" title="Permalink to this heading">¶</a></h2>
<p>This development was sponsored by <a class="reference external" href="https://nlnet.nl/">NLnet Foundation</a>.</p>
<div class="line-block">
<div class="line">Happy hacking.</div>
<div class="line">kvch // 2017.05.13 22:57</div>
</div>
</section>
</section>


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