title: Apply function on all values of dictionary
body: <p>I have dictionary that look like</p>
  
  <pre><code>d= {(1, 8): 94.825000000000003, (2, 8): 4.333}
  </code></pre>
  
  <p>I am trying to apply a function to round all the values. </p>
  
  <p>I don't wanna re-create the dictionary. </p>
  
  <pre><code>newD= {}
  for x,y in d.iteritems():
     newD+= {x:round(y)}
  </code></pre>
  
  <p>Is there any pythonic-way to apply <code>round</code> function on all values ? </p>