title: Python convert timestampMS to date
body: <p>using python 2.7 I have timestampMS ex: <code>timestampMs 1478001612891</code></p>
  
  <p>I want to convert it to a date format. </p>
  
  <p>I have tried <code>datetime.fromtimestamp(int('1478013706323'))</code></p>
  
  <p>but get this error </p>
  
  <pre><code>Traceback (most recent call last):
    File "&lt;interactive input&gt;", line 1, in &lt;module&gt;
  ValueError: timestamp out of range for platform localtime()/gmtime() function
  </code></pre>