     <span class="k">for</span> <span class="n">line</span> <span 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">0</span>
                <span class="c1"># Database = [set([i.rstrip() for i in transaction.split(&#39;\t&#39;)]) for transaction in f]</span>
                <span class="k">for</span> <span class="n">transaction</span> <spa