title: list comprehension joining every two elements together in a list
body: <p>How would I convert lst1 to lst2 by joining element 1 to element 2 and so on?</p>
  
  <pre><code>lst1=[' ff 55 00 90 00 92 00 ad 00 c6 00 b7 00 8d 00 98 00 87 00 8a 00 98 00 8f 00 ca 01 78 03 54 05 bf']
  </code></pre>
  
  <p>to </p>
  
  <pre><code>lst2=[ff55, 0090, 0092, 00ad, 00c6, 00b7, 008d, 0098, 0087, 008a, 0098, 008f, 00ca, 0178, 0354,05bf]
  </code></pre>
  
  <p>I tried but it was not as expected:</p>
  
  <pre><code>   for i in lst:
          lstNew = []
          tempList =  i.split()
          lenList = len(tempList)
          #print tempList
          index = 0
          while (index &lt; lenList):
              print tempList[index] + tempList[index+1]
              index = index + 2
  </code></pre>