title: Average of two consecutive elements in the list in Python
body: <p>I have a list of even number of float numbers:</p>
  
  <blockquote>
    <p>[2.34, 3.45, 4.56, 1.23, 2.34, 7.89, ...].</p>
  </blockquote>
  
  <p>My task is to calculate average of 1 and 2 elements, 3 and 4, 5 and 6, etc. What is the short way to do this in Python? </p>