-</span>
<span class="kn">import</span> <span class="nn">Converter.PyTree</span> <span class="k">as</span> <span class="nn">C</span>
<span class="kn">import</span> <span class="nn">Geom.PyTree</span> <span class="k">as</span> <span class="nn">D</span>
<span class="kn">import</span> <span class="nn">Generator.IBM</span> <span class="k">as</span> <span class="nn">G_IBM</span>

<span class="n">tb</span> <span class="o">=</span> <span class="n">D</span><span class="o">.</span><span class="n">sphere</span><span 