pan class="o">.</span><span class="n">apply</span><span class="p">(</span><span class="k">lambda</span> <span class="n">x</span><span class="p">:</span> <span class="n">pd</span><span class="o">.</span><span class="n">to_numeric</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">errors</span><span class="o">=</span><span class="s1">&#39;ignore&#39;</span><span class="p">))</span>
  <span class="n">pickle</span><span class="o">.</span><span class="n">dump</span><sp