We keep the language evolving... [we] need to move forward or die.
—Yukihiro “Matz” Matsumoto(), September 2008(verbally at Lone Star Ruby conference;the actual quote Guido was referring to)
Python is currently undergoing its most significant transformation since it was first released back in the winter of 1991. Python 3 is backward incompatible with all older versions, so porting will be a more significant issue than in the past.
Unlike other end-of-life efforts, however, Python 2.x will not disappear anytime soon. In fact, the remainder of the version 2.x series will ...