n class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_Database</span><span class="p">:</span>
                    <span class="n">transNum</span> <span class="o">+=</span> <span class="mi">1</span>
                    <span class="bp">self</span><span class="o">.</span><span class="n">_trans_set</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">transNum</span><span class="p">)</span>
                    <span class="k">for</