title: Rounding floats with f-string
body: <p>Using %-formatting, I can specify the number of decimal cases in a string:</p>
  
  <pre><code>x = 3.14159265
  print('pi = %0.2f' %x)
  </code></pre>
  
  <p>This would give me:</p>
  
  <pre><code>pi = 3.14
  </code></pre>
  
  <p>Is there any way of doing this using f-strings in Python 3.6?</p>