class="bp">self</span><span class="o">.</span><span class="n">get_pbc</span><span class="p">()</span><span class="o">.</span><span class="n">any</span><span class="p">():</span>
                <span class="n">cell</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_cell</span><span class="p">()</span>
                <span class="n">basis_lengths</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">linalg</span>