lock" id="Test_portfolio_extractor.test_extractor_get_portfolio_period"><a class="viewcode-back" href="../../../docs/source/time_series_transform.test.html#time_series_transform.test.test_stock_base.Test_portfolio_extractor.test_extractor_get_portfolio_period">[docs]</a>    <span class="nd">@pytest</span><span class="o">.</span><span class="n">mark</span><span class="o">.</span><span class="n">parametrize</span><span class="p">(</span><span class="s2">&quot;periods&quot;</span><span class="p">,</span> <span