ons</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
            <span class="n">options</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">default_options</span>

        <span class="bp">self</span><span class="o">.</span><span class="n">_ifc</span> <span class="o">=</span> <span class="n">DeviceInterface</span><span class="p">(</span><span class="n">options</span><span class="p">)</span>
        <span class="bp">self</