title: Python values of multiple lists in one list comprehension
body: <p>Is there any smart way to write a list comprehension over more than one list?</p>
  
  <p>I know I could use a separate range list as index but this way I have to know the length (or get it separately with a <code>len()</code> function call).</p>
  
  <pre><code>&gt;&gt;&gt; a = range(10)
  &gt;&gt;&gt; b = range(10, 0, -1)
  &gt;&gt;&gt; [(a[x],b[x]) for x in range(10)]
  [(0, 10), (1, 9), (2, 8), (3, 7), (4, 6), (5, 5), (6, 4), (7, 3), (8, 2), (9, 1)]
  </code></pre>
  
  <p>I'd love to have something like this:</p>
  
  <pre><code>&gt;&gt;&gt; [(a,b) for a in range(10) and b in range(10, 0, -1)]
  [(0, 10), (1, 9), (2, 8), (3, 7), (4, 6), (5, 5), (6, 4), (7, 3), (8, 2), (9, 1)]
  </code></pre>
  
  <p>How would you write the list comprehension? Is there a way to do this with itertools?</p>
  
  <p>The range list just stand for any list and I do not necessarily want to get a tuple. there could also be a function which takes a and b as parameters. So zip is not what I want. </p>
  
  <p>UPDATE: With "So zip is not what I want." I meant that I don't want <code>zip(range(10), range(10, 0, -1))</code></p>