span><span class="o">.</span><span class="n">_varname</span> <span class="o">=</span> <span class="n">varname</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">_branch_name</span> <span class="o">=</span> <span class="n">branch_name</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">_values</span> <span class="o">=</span> <span class="n">values</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">_single</span> <s