[Python-ideas] Re: List comprehension operators

[Ben Rudiak-Gould]

If you didn't know, range objects already support most non-mutating list
methods:

>>> fakelist = range(1, 101)
>>> fakelist[-1]
100
>>> fakelist[-10:]
range(91, 101)
>>> 50 in fakelist
True
>>> fakelist.index(50)
49

Range objects are more efficient than lists since they use O(1) memory
instead of O(n), and many of the methods take O(1) time instead of O(n).
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[Python-ideas] Re: List comprehension operators

[Steven D'Aprano]

On Tue, Dec 14, 2021 at 03:46:06PM -, a.kolpakov2010--- via Python-ideas 
wrote:
> It would be awesome to be able to create a list with just:
> 
> li = [1—100]

[1-100] already has a meaning in Python: it computes 1-100 = -99 and 
puts it in a list.

> or 
> 
> li = [1 .. 100]

Is that an open, closed, or half-open interval?

-- 
Steve
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[Python-ideas] Re: List comprehension operators

[Simão Afonso]

On 2021-12-14 15:46:06, a.kolpakov2010--- via Python-ideas wrote:
> It would be awesome to be able to create a list with just:
> 
> li = [1—100]
> 
> or 
> 
> li = [1 .. 100]

What's wrong with

> range(1, 100)

Do you really want a list only to use in a for loop? What's wrong with
the iterator?
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[Python-ideas] Re: List comprehension operators

[Finn Mason]

list(range(1, 101))

I think we don't need a whole new syntax for something that's already an
easy one-liner.


--
Finn (Mobile)

On Tue, Dec 14, 2021, 8:52 AM a.kolpakov2010--- via Python-ideas <
python-ideas@python.org> wrote:

> It would be awesome to be able to create a list with just:
>
> li = [1—100]
>
> or
>
> li = [1 .. 100]
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[Python-ideas] Re: List comprehension operators

[Matt D]

Seems like a lot of work to just make

list(range(1,100))

Insignificantly easier to write
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