adding two consecutive numbers in a list
<p>How to add two consecutive number in the list.</p>

<pre><code>l = [1,2,3,4,5,6,7,8,9]
</code></pre>

<p>result = <code>[3,7,11,15,9]</code></p>

<pre><code>l = [1,2,3,4,5,6,7,8,9,10]
</code></pre>

<p>result = <code>[3,7,11,15,19]</code></p>

<p>I can easily achieve it using simple for loop. But
How can I achieve it using more pythonic way.</p>
