title: Round() not working
body: <pre><code>D1_inv
  Out[23]: [0.024799999999999999, 0.029600000000000001, 0.035799999999999998]
  </code></pre>
  
  <p>I'm trying to round these figures upto 4 decimal places. I've used this:</p>
  
  <pre><code>for i in D1_inv:
      round(i,4)
  </code></pre>
  
  <p>But the output remains the same as above. Can somebody help me here?</p>