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<h2 class="heading"><span>List Circuits</span></h2>
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<div class="section" id="list-circuits">
<h1>List Circuits<a class="headerlink" href="#list-circuits" title="Permalink to this headline"></a></h1>
<a class="reference external image-reference" href="../double_double_toil_and_trouble.html"><img alt="../../_images/back.png" src="../../_images/back.png" /></a>
<p>Tor creates new circuits and tears down old ones on your behalf, so how can you
get information about circuits Tor currently has available?</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">stem</span> <span class="kn">import</span> <span class="n">CircStatus</span>
<span class="kn">from</span> <span class="nn">stem.control</span> <span class="kn">import</span> <span class="n">Controller</span>
<span class="k">with</span> <span class="n">Controller</span><span class="o">.</span><span class="n">from_port</span><span class="p">(</span><span class="n">port</span> <span class="o">=</span> <span class="mi">9051</span><span class="p">)</span> <span class="k">as</span> <span class="n">controller</span><span class="p">:</span>
<span class="n">controller</span><span class="o">.</span><span class="n">authenticate</span><span class="p">()</span>
<span class="k">for</span> <span class="n">circ</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">controller</span><span class="o">.</span><span class="n">get_circuits</span><span class="p">()):</span>
<span class="k">if</span> <span class="n">circ</span><span class="o">.</span><span class="n">status</span> <span class="o">!=</span> <span class="n">CircStatus</span><span class="o">.</span><span class="n">BUILT</span><span class="p">:</span>
<span class="k">continue</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;&quot;</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot;Circuit </span><span class="si">%s</span><span class="s"> (</span><span class="si">%s</span><span class="s">)&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">circ</span><span class="o">.</span><span class="n">id</span><span class="p">,</span> <span class="n">circ</span><span class="o">.</span><span class="n">purpose</span><span class="p">))</span>
<span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">entry</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">circ</span><span class="o">.</span><span class="n">path</span><span class="p">):</span>
<span class="n">div</span> <span class="o">=</span> <span class="s">&#39;+&#39;</span> <span class="k">if</span> <span class="p">(</span><span class="n">i</span> <span class="o">==</span> <span class="nb">len</span><span class="p">(</span><span class="n">circ</span><span class="o">.</span><span class="n">path</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">)</span> <span class="k">else</span> <span class="s">&#39;|&#39;</span>
<span class="n">fingerprint</span><span class="p">,</span> <span class="n">nickname</span> <span class="o">=</span> <span class="n">entry</span>
<span class="n">desc</span> <span class="o">=</span> <span class="n">controller</span><span class="o">.</span><span class="n">get_network_status</span><span class="p">(</span><span class="n">fingerprint</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span>
<span class="n">address</span> <span class="o">=</span> <span class="n">desc</span><span class="o">.</span><span class="n">address</span> <span class="k">if</span> <span class="n">desc</span> <span class="k">else</span> <span class="s">&#39;unknown&#39;</span>
<span class="k">print</span><span class="p">(</span><span class="s">&quot; </span><span class="si">%s</span><span class="s">- </span><span class="si">%s</span><span class="s"> (</span><span class="si">%s</span><span class="s">, </span><span class="si">%s</span><span class="s">)&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">div</span><span class="p">,</span> <span class="n">fingerprint</span><span class="p">,</span> <span class="n">nickname</span><span class="p">,</span> <span class="n">address</span><span class="p">))</span>
</pre></div>
</div>
<div class="highlight-python"><pre>% python list_circuits.py
Circuit 4 (GENERAL)
|- B1FA7D51B8B6F0CB585D944F450E7C06EDE7E44C (ByTORAndTheSnowDog, 173.209.180.61)
|- 0DD9935C5E939CFA1E07B8DDA6D91C1A2A9D9338 (afo02, 87.238.194.176)
+- DB3B1CFBD3E4D97B84B548ADD5B9A31451EEC4CC (edwardsnowden3, 109.163.234.10)
Circuit 6 (GENERAL)
|- B1FA7D51B8B6F0CB585D944F450E7C06EDE7E44C (ByTORAndTheSnowDog, 173.209.180.61)
|- EC01CB4766BADC1611678555CE793F2A7EB2D723 (sprockets, 46.165.197.96)
+- 9EA317EECA56BDF30CAEB208A253FB456EDAB1A0 (bolobolo1, 96.47.226.20)
Circuit 10 (GENERAL)
|- B1FA7D51B8B6F0CB585D944F450E7C06EDE7E44C (ByTORAndTheSnowDog, 173.209.180.61)
|- 00C2C2A16AEDB51D5E5FB7D6168FC66B343D822F (ph3x, 86.59.119.83)
+- 65242C91BFF30F165DA4D132C81A9EBA94B71D62 (torexit16, 176.67.169.171)</pre>
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