title: Converting values of dictionary to the timestamp format
body: <p>I have the dictionary like this:</p>
  
  <pre><code>&gt;&gt;print xdict 
  {'time': [(2015, 6, 3, 10, 41, 3), (2015, 6, 3, 20, 32, 21), ..., ...]}
  </code></pre>
  
  <p>Is it a way to transform those values to timestamp format? I wanted to be exactly like  this:</p>
  
  <pre><code>print xdict
  {'time': [1433320863.0, 1433356341.0, ..., ...]}
  </code></pre>