What about idea of making a "Pythonic Lisp"...i.e. a Lisp that more closely resembles the syntax of Python?
Chris Angelico
rosuav at gmail.com
Thu Sep 19 15:20:38 EDT 2019
On Fri, Sep 20, 2019 at 5:16 AM Cecil Westerhof <Cecil at decebal.nl> wrote:
>
> Paul Rubin <no.email at nospam.invalid> writes:
>
> > Python 3.7.3 (default, Apr 3 2019, 05:39:12)
> > Type "help", "copyright", "credits" or "license" for more information.
> > >>> a = range(10)
> > >>> b = reversed(a)
> > >>> sum(a) == sum(b)
> > True
> > >>> sum(b) == sum(a)
> > False
>
> Why does this happen?
>
> By the way, when you change the last statement to:
> sum(a) == sum(b)
>
> you also get False.
>>> sum(range(10)) == sum(reversed(range(10)))
True
If you actually want a reversed range, use slice notation instead of
the reversed() function, which is more parallel to iter().
>>> a = range(10)
>>> b = a[::-1]
>>> sum(a) == sum(b)
True
>>> sum(b) == sum(a)
True
Now you actually have a range that runs the other direction, instead
of an iterator that runs through the range backwards.
ChrisA
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