title: flatMap or bind in Python 3?
body: <p>Python provides list comprehensions that provide map/filter type functionality. Can I do a flatMap aka bind operation with this? I've seen solutions with itertools or other add-on libraries. Can I do this with core Python?</p>
  
  <pre><code># this
  [[x,10*x] for x in [1,2,3]]
  # will result in unflattened [[1, 10], [2, 20], [3, 30]]
  </code></pre>