title: How to force the number of digits in python
body: <p>For instance</p>
  
  <pre><code>5 / 2 = 2.5 
  </code></pre>
  
  <p>What I want is to force it to 4 digits:</p>
  
  <pre><code>5 / 2 = 2.5000
  1 / 2 = 0.5000
  10 / 10 = 1.0000
  </code></pre>
  
  <p>I tried to use round(5/2, 4) but it does not work.</p>