span class="si">{</span><span class="n">length_unit</span><span class="si">}</span><span class="s1">)&#39;</span><span class="p">,</span>
              <span class="n">y_axis_label</span><span class="o">=</span><span class="sa">f</span><span class="s1">&#39;Cohesive Energy (</span><span class="si">{</span><span class="n">energy_unit</span><span class="si">}</span><span class="s1">/atom)&#39;</span><span class="p">)</span>

<span class="n">plot</span><span class="o">.</span><span class="n">line</span><span c