an class="o">=</span><span class="s1">&#39;constant&#39;</span>

<span class="gp">In [31]: </span><span class="n">cval</span><span class="o">=</span><span class="n">np</span><span class="o">.</span><span class="n">nan</span>

<span class="gp">In [32]: </span><span class="n">digits</span> <span class="o">=</span> <span class="mi">2</span>

<span class="gp">In [33]: </span><span class="n">min_lat</span> <span class="o">=</span> <span class="o">-</span><span class="mi">48</span>

<span class="gp">In [3