(en) Mark Lutz, Learning Python: Powerful Object-Oriented Programming, O'Reilly Media, Inc., , 1216p. (ISBN9781449379322, lire en ligne), «How Does Python Stack Up to Langage», p.17
Richard Ouzounian, "Python still has legs", Toronto Star, 16 juillet 2006, «it was on an Air Canada flight on the way to Vancouver, when John (Cleese) turned to all of us and said `I want out.' Why? I don't know. He gets bored more easily than the rest of us. He's a difficult man, not easy to be friendly with. He's so funny because he never wanted to be liked. That gives him a certain fascinating, arrogant freedom».