title: Line continuation for list comprehensions or generator expressions in python
body: <p>How are you supposed to break up a very long list comprehension?</p>
  
  <pre><code>[something_that_is_pretty_long for something_that_is_pretty_long in somethings_that_are_pretty_long]
  </code></pre>
  
  <p>I have also seen somewhere that people that dislike using '\' to break up lines,
  but never understood why. What is the reason behind this?</p>