an class="n">grid_data_name</span><span class="p">]</span><span class="o">.</span><span class="n">isnull</span><span class="p">()</span><span class="o">.</span><span class="n">sum</span><span class="p">()</span>

<span class="gp">In [23]: </span><span class="n">interpc</span><span class="o">.</span><span class="n">grid_interp_na</span><span class="p">()</span>

<span class="gp">In [24]: </span><span class="n">nan2</span> <span class="o">=</span> <span class="n">interpc</span><span class="o">.</span><spa