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  • Eihab Hala thinks this is interesting:

Earlier and Later Python Changes

Each edition before the third also incorporated Python changes too—the first two editions from 1999 and 2003 covered Pythons 2.0 and 2.2, and their 1996 Programming Python 1st Edition predecessor, from which my three later books were all derived, began the process with Python 1.3—but I’ve omitted these here because they are now ancient history (well, in computer field terms, at least).

From

Cover of Learning Python, 5th Edition

Note

Earlier and Later Python Changes