s="s2">&quot;A_j&quot;</span><span class="p">:</span> <span class="s2">&quot;A_i_&quot;</span> <span class="o">+</span> <span class="n">full_id</span><span class="p">,</span>
            <span class="p">}</span>
        <span class="p">)</span>

        <span class="c1"># add to full mapping table, left outer join</span>
        <span class="c1"># so all positions in target sequence are kept</span>
        <span class="k">if</span> <span class="n">full_map</span> <span class="ow">is</span> <span class="kc">