title: How to check Pandas cell value is nan
body: <p>I am getting value of cell as <code>nan</code>, But when I do <code>cell_value == np.nan</code> then it's False.</p>
  
  <p>Then I tried to print <code>type(cell_value)</code> it's giving <code>&lt;class 'float'&gt;</code></p>
  
  <p>How do I match it ?</p>