&quot;</span><span class="p">,</span> <span class="n">key_location</span> <span class="o">=</span> <span class="s2">&quot;/home/ubuntu/.ssh/my_key.pem&quot;</span><span class="p">,</span> <span class="n">security_group</span> <span class="o">=</span> <span class="s2">&quot;my_security_group&quot;</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">cluster</span> <span class="o">=</span> <span class="n">manager</span><span class="o">.</span><span class="n">from_json</span><spa