<span class="s2">&quot;FFTW_FFT_3D&quot;</span><span class="w"> </span><span class="p">.</span><span class="nb">and</span><span class="p">.</span><span class="w"> </span><span class="p">.</span><span class="nb">not</span><span class="p">.</span><span class="w"> </span><span class="nb">present</span><span class="p">(</span><span class="n">threads</span><span class="p">))</span><span class="w"> </span><span class="k">then</span>
<span class="k">            result</span><span class="w"> </span><span class="o">