wish list for python

[Jim Newton]

does anyone know where i can find the current wish-list or to-do list
for futer python releases?

Does anyone know if there is a play to allow non-evaluatable statements
to return values? I'm only a week to this language so far but it
seems very strange to me (coming from a list background) that i cannot
somehow say
x = if a:
then b
else c

or

x = for i in some-sequence:
blah blah blah.


and what about something like the following?

x = cond:
a > 1:
0
a > 10:
1
a > 100:
2
True:
-1


????
-jim

[Andrew Bennetts]

Re: wish list for python

On Fri, Oct 24, 2003 at 06:47:27AM +0200, Jim Newton wrote:[color=blue]
> does anyone know where i can find the current wish-list or to-do list
> for futer python releases?[/color]

Python Enhancement Proposals:

http://python.org/peps/

and the SourceForge bug/patch trackers:

http://sourceforge.net/bugs/?group_id=5470

http://sourceforge.net/patch/?group_id=5470

And failing all else, try searching the comp.lang.pytho n archives :)
[color=blue]
> Does anyone know if there is a play to allow non-evaluatable statements
> to return values? I'm only a week to this language so far but it
> seems very strange to me (coming from a list background) that i cannot
> somehow say
> x = if a:
> then b
> else c[/color]

For this particular expression, see PEP 308 (which has been rejected).
[color=blue]
> x = for i in some-sequence:
> blah blah blah.[/color]

I'm not sure what this is meant to mean, but I suspect PEP 289 would provide
what you're after.
[color=blue]
> and what about something like the following?
>
> x = cond:
> a > 1:
> 0
> a > 10:
> 1
> a > 100:
> 2
> True:
> -1[/color]

See the second proposed solution in PEP 275, which is still listed as "Open"
-- but Guido doesn't seem keen on the idea:

http://www.python.org/doc/essays/pepparade.html

Besides, this particular example is probably better written as:
try:
x = int(math.log10( a))
except (OverflowError, ValueError):
x = -1

-Andrew.

[Emile van Sebille]

Re: wish list for python


"Jim Newton" <jimka@rdrop.co m> wrote in message
news:3F98AEDF.4 020505@rdrop.co m...[color=blue]
> does anyone know where i can find the current wish-list or to-do list
> for futer python releases?
>[/color]

http://www.python.org/peps/

[color=blue]
> Does anyone know if there is a play to allow non-evaluatable statements
> to return values?[/color]

http://www.python.org/peps/pep-0308.html

HTH,

Emile van Sebille
emile@fenx.com

[David Eppstein]

Re: wish list for python

In article <3F98AEDF.40205 05@rdrop.com>, Jim Newton <jimka@rdrop.co m>
wrote:
[color=blue]
> does anyone know where i can find the current wish-list or to-do list
> for futer python releases?[/color]

http://www.python.org/peps/

--
David Eppstein http://www.ics.uci.edu/~eppstein/
Univ. of California, Irvine, School of Information & Computer Science

[Dave Kuhlman]

Re: wish list for python

Jim Newton wrote:

[snip]
[color=blue]
> x = for i in some-sequence:
> blah blah blah.[/color]

Python has "list comprehensions" for this. Consider:
[color=blue][color=green][color=darkred]
>>> a = [-1,1,-2,2,-3,3]
>>> a[/color][/color][/color]
[-1, 1, -2, 2, -3, 3][color=blue][color=green][color=darkred]
>>> [x for x in a if x > 0][/color][/color][/color]
[1, 2, 3][color=blue][color=green][color=darkred]
>>> def f(x):[/color][/color][/color]
... return x * 3
...[color=blue][color=green][color=darkred]
>>> [f(x) for x in a if x > 0][/color][/color][/color]
[3, 6, 9][color=blue][color=green][color=darkred]
>>>[/color][/color][/color]

For more info see: ... Well, I searched but could not find any
documentation on list comprehensions. I suppose that's the
problem with putting every feature anyone asks for into a
language.

At one time, we had a nice, understandable language that even I
could learn. Sigh.

"I used to love her"

I used to wake up each morning, get my breakfast in bed.
When I had some worries she would ease my aching head.
Now she runs around, with every man in town.
Still trying to take me for that same old clown.
Because I used to love her. But, it's all over now.

-- The Animals

Adde parvum parvo magnus acervus erit.
[Add little to little and there will be a big pile.]

-- Ovid, quoted from "The mythical man-month", Frederick Brooks,
Chapter 5, "The second-system effect"

I admit it. I'm a little grouchy this morning. My work on this
parser thing is not going so well.

OK. One more search and I found some documentation -- See Tutorial,
"5.1.4 List Comprehensions" :

http://www.python.org/doc/current/tut/node7.html#SECTION007140000000000000000

Dave

[snap, err, I mean snip]

--
Dave Kuhlman

http://www.rexx.com/~dkuhlman

dkuhlman@rexx.c om

[David]

Re: wish list for python

Con fecha Fri, 24 Oct 2003 06:47:27 +0200
Jim Newton <jimka@rdrop.co m> escribió:
[color=blue]
> does anyone know where i can find the current wish-list or to-do list
> for futer python releases?
>
> Does anyone know if there is a play to allow non-evaluatable
> statements to return values? I'm only a week to this language so
> far but it seems very strange to me (coming from a list background)
> that i cannot somehow say
> x = if a:
> then b
> else c
>
> or
>
> x = for i in some-sequence:
> blah blah blah.
>
>
> and what about something like the following?
>
> x = cond:
> a > 1:
> 0
> a > 10:
> 1
> a > 100:
> 2
> True:
> -1
> [/color]

Try Ruby! ;-)

[Skip Montanaro]

Re: wish list for python

[color=blue]
> x = cond:
> a > 1:
> 0
> a > 10:
> 1
> a > 100:
> 2
> True:
> -1[/color]

PEP 275:

http://www.python.org/peps/pep-0275.html

Skip

[python newbie]

Re: wish list for python

>I admit it. I'm a little grouchy this morning. My work on this[color=blue]
>parser thing is not going so well.[/color]

"Work performed with attachment is a shackle, whereas work performed
with detachment does not affect the doer. He is, even while working, in
solitude."
-Maharshi