          <span class="n">cmds</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
                <span class="s2">&quot;alter </span><span class="si">{}</span><span class="s2">, b=</span><span class="si">{}</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">sel</span><span class="p">,</span> <span class="n">r</span><span class="p">[</span><span class="s2">&quot;b_factor&quot;</span><span class="p"