entire watcher</span>
    <span class="k">if</span> <span class="n">extra</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
        <span class="n">watcher</span><span class="o">.</span><span class="n">activate</span><span class="p">()</span>
    <span class="k">else</span><span class="p">:</span>
        <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">extra</span><span class="p">:</span>
            <span class="n">watch