title: Single line for loop over iterator with an "if" filter?
body: <p>Silly question:<br>
  I have a simple for loop followed by a simple if statement:  </p>
  
  <pre><code>for airport in airports:
      if airport.is_important:
  </code></pre>
  
  <p>and I was wondering if I can write this as a single line somehow.<br>
  So, yes, I can do this:  </p>
  
  <pre><code>for airport in (airport for airport in airports if airport.is_important):
  </code></pre>
  
  <p>but it reads so silly and redundant (<code>for airport in airport for airport in airports...</code>).<br>
  Is there a better way?</p>