title: Python, divide all numbers in a 2d list by 10 and return a 2d list
body: <p>I wrote this solution, and coming from Ruby it seems very elegant. However, is this the way a python programmer would do it?</p>
  
  <pre><code>a = [[2,3,4], [9,1,2]]
  print map(lambda(i): map(lambda(p): p/10.0,i), a)
  </code></pre>
  
  <p>And... what if instead of 10, I wanted to use the total of all the values in the nested 2d list?</p>