Raymond Hettinger <[email protected]> added the comment:
As a teacher, I think the proposal makes us worst off. It is far easier and
more useful at the interactive prompt to use list() rather than print() to show
ranges:
>>> list(range(10))
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> list(range(2, 10))
[2, 3, 4, 5, 6, 7, 8, 9]
>>> list(range(2, 10, 3))
[2, 5, 8]
If you do the same thing with print(), it takes an additional character
("print" vs "list"), it creates a new source of confusion (str vs repr), and it
doesn't generalize to other iterators like enumerate(), reversed(), and
generators.
Also, the various ideas listed for a possible new __str__ are all awkward or
mysterious for some inputs (empty ranges, short ranges, etc).
FWIW, I teach this topic every week. Presenting with list(range(...)) is less
convenient than with the Python 2.7 version, but it works out just fine in
practice and nicely sets the stage for covering set(iterable), tuple(iterable),
dict.fromkeys(iterable), etc.
I'm opposed the this proposal because I think it will create more teaching
difficulties than it solves.
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Python tracker <[email protected]>
<https://bugs.python.org/issue35200>
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