title: Python output from print(print(print('aaa')))
body: <p>I don't quite understand output received from:</p>
  
  <blockquote>
    <p>print(print(print('aaa')))</p>
    
    <p>aaa</p>
    
    <p>None</p>
    
    <p>None</p>
  </blockquote>
  
  <p>First aaa is clear. But I thought that second print(aaa) will throw an error as variable aaa is not defined...</p>