"o">.</span><span class="n">getNumParticles</span><span class="p">()):</span>
        <span class="n">model</span><span class="o">.</span><span class="n">chr_system</span><span class="o">.</span><span class="n">getForce</span><span class="p">(</span><span class="n">index_spec_spec_potential</span><span class="p">)</span><span class="o">.</span><span class="n">setParticleParameters</span><span class="p">(</span><span class="n">m</span><span class="p">,</span> <span class="p">[</span><span class="n">model</sp