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<meta property="og:description" content="During the final weeks of my exam session I started reading a bit about python 3 using an excellent book: Dive into Python.
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When I noted that python uses the Mersenne Twister PRNG as well I decided to">
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Caught in the Net
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<header><h1 class="post-title">
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<h1 class="p-name post-title" itemprop="headline name">The Buridan's donkey in python</h1>
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</h1>
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</header><p class="dateline post-date">02 April 2016</p>
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<p>During the final weeks of my exam session I started reading a bit about python 3 using an excellent book: <a href="http://www.diveintopython.net/">Dive into Python</a>.
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When I noted that python uses the <a href="https://en.wikipedia.org/wiki/Mersenne_Twister">Mersenne Twister PRNG</a> as well I decided to write another version of my <a href="http://francescomecca.eu/index.php/archives/207">Buridan's donkey program</a>.</p>
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<p>.. code:: python</p>
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<pre class="code literal-block"><span></span> <span class="s s-Atom">import</span> <span class="s s-Atom">random</span><span class="p">,</span> <span class="s s-Atom">sys</span>
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<span class="s s-Atom">if</span> <span class="k">__</span><span class="s s-Atom">name__</span> <span class="o">==</span> <span class="s s-Atom">'__main__':</span>
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<span class="s s-Atom">args</span> <span class="o">=</span> <span class="nf">list</span><span class="p">()</span>
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<span class="s s-Atom">if</span> <span class="o">not</span> <span class="s s-Atom">sys</span><span class="p">.</span><span class="s s-Atom">stdin</span><span class="p">.</span><span class="nf">isatty</span><span class="p">()</span><span class="s s-Atom">:</span>
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<span class="s s-Atom">for</span> <span class="s s-Atom">line</span> <span class="s s-Atom">in</span> <span class="s s-Atom">sys</span><span class="p">.</span><span class="nn">stdin</span><span class="p">:</span>
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<span class="s s-Atom">if</span> <span class="s s-Atom">line</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="o">is</span> <span class="s s-Atom">'\n':</span>
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<span class="s s-Atom">line</span> <span class="o">=</span> <span class="s s-Atom">line</span><span class="p">[:-</span><span class="mi">1</span><span class="p">]</span>
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<span class="s s-Atom">args</span><span class="p">.</span><span class="nf">append</span><span class="p">(</span><span class="s s-Atom">line</span><span class="p">)</span>
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<span class="nn">else</span><span class="p">:</span>
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<span class="s s-Atom">args</span> <span class="o">=</span> <span class="s s-Atom">sys</span><span class="p">.</span><span class="s s-Atom">argv</span><span class="p">[</span><span class="mi">1</span><span class="s s-Atom">:</span><span class="p">]</span>
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<span class="s s-Atom">argRange</span> <span class="o">=</span> <span class="nf">len</span><span class="p">(</span><span class="s s-Atom">args</span><span class="p">)</span>
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<span class="s s-Atom">for</span> <span class="s s-Atom">i</span> <span class="s s-Atom">in</span> <span class="nf">range</span><span class="p">(</span><span class="s s-Atom">argRange</span><span class="p">)</span><span class="s s-Atom">:</span>
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<span class="nf">print</span><span class="p">(</span><span class="nf">str</span><span class="p">(</span><span class="s s-Atom">i</span><span class="o">+</span><span class="mi">1</span><span class="p">)</span> <span class="o">+</span> <span class="s s-Atom">'.'</span><span class="p">,</span> <span class="s s-Atom">args</span><span class="p">.</span><span class="nf">pop</span><span class="p">(</span><span class="s s-Atom">random</span><span class="p">.</span><span class="nf">randrange</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="nf">len</span><span class="p">(</span><span class="s s-Atom">args</span><span class="p">))))</span>
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</pre>
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<p>This script works in a different way than the one in c++.
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Rather than shuffling a list made by the entries in the arguments, it pops randomly one entry from the list till the list is empty.</p>
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<p>Not satisfied enough, I wrote also a telegram bot using the <a href="https://github.com/eternnoir/pyTelegramBotAPI">telebot library</a> that works as the script above but inside the telegram app.
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The bot can be added to your contact list by simply searching for <a href="http://telegram.me/duridan_donkey_bot">@duridan_donkey_bot</a> (yes, a typo!)</p>
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<p>All the code is opensource and can be found on my github page.</p>
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<p>Francesco Mecca</p>
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