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Core Python Applications Programming, Third Edition by Wesley J. Chun

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Appendix D. Python 3 Migration with 2.6+

We keep the language evolving... [we] need to move forward or die.

—Yukihiro “Matz” Matsumoto(Image), September 2008(verbally at Lone Star Ruby conference;the actual quote Guido was referring to)

D.1. Python 3: The Next Generation

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 ...

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