an class="n">sqrt</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">sum</span><span class="p">(</span><span class="n">m</span><span class="o">**</span><span class="mi">2</span><span class="p">,</span><span class="n">axis</span><span class="o">=</span><span class="mi">1</span><span class="p">))</span><span class="o">&lt;</span><span class="mf">0.4</span><span class="p">)[</span><span class="mi">0</span><span class="p">])</span> <span class="o">==</span> <span clas