gb</span><span class="o">.</span><span class="n">data</span><span class="o">.</span><span class="n">read_csv</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="p">[</span><span class="s1">&#39;bet_time&#39;</span><span class="p">,</span><span class="s1">&#39;payout_time&#39;</span><span class="p">,</span><span class="s1">&#39;duration&#39;</span><span class="p">])</span> <span class="k">for</span> <span class="n">f</span> <span class="ow">in</span> <span class="n">os