On Dec 29, 2007 11:10 PM, Raymond Hettinger <[EMAIL PROTECTED]> wrote:
> I'm considering deprecating these two functions and would like some
> feedback from the community or from people who have a background in
> functional programming.
Personally, I'd rather you kept them around. I have no FP bac
Raymond Hettinger <[EMAIL PROTECTED]> writes:
> > I presume you did scans of
> > large code bases and you did not find occurrences of
> > takewhile and dropwhile, right?
>
> Yes.
I think I have used them. I don't remember exactly how. Probably
something that could have been done more generally
On Jan 3, 4:39 pm, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> On Dec 29 2007, 11:10 pm, Raymond Hettinger <[EMAIL PROTECTED]> wrote:
>
> > I'm considering deprecating these two functions and would like some
> > feedback from the community or from people who have a background in
> > functional
On Dec 29 2007, 11:10 pm, Raymond Hettinger <[EMAIL PROTECTED]> wrote:
> I'm considering deprecating these two functions and would like some
> feedback from the community or from people who have a background in
> functional programming.
Well I have just this minute used dropwhile in anger, to find
Raymond Hettinger wrote:
> I'm considering deprecating these two functions and would like some
> feedback from the community or from people who have a background in
> functional programming.
>
> * I'm concerned that use cases for the two functions are uncommon and
> can obscure code rather than cl
On Dec 31, 1:25 am, Raymond Hettinger <[EMAIL PROTECTED]> wrote:
> FWIW, here is an generator version written without the state flag:
>
> def iter_block(lines, start_marker, end_marker):
> lines = iter(lines)
> for line in lines:
> if line.startswith(start_marker):
>
FWIW, here is an generator version written without the state flag:
def iter_block(lines, start_marker, end_marker):
lines = iter(lines)
for line in lines:
if line.startswith(start_marker):
yield line
break
for line in lines:
[Marc 'BlackJack' Rintsch]
> I use both functions from time to time.
> One "recipe" is extracting blocks from text files that are delimited by a
> special start and end line.
>
> def iter_block(lines, start_marker, end_marker):
> return takewhile(lambda x: not x.startswith(end_marker),
>
[Michele Simionato]
> in my code
> base I have exactly zero occurrences of takewhile and
> dropwhile, even if I tend to use the itertools quite
> often. That should be telling.
Thanks for the additional empirical evidence.
> I presume you did scans of
> large code bases and you did not find occur
[bearophile]
> Here are my usages (every sub-list is
> sorted by inverted frequency usage):
>
> I use often or very often:
> groupby( iterable[, key])
> imap( function, *iterables)
> izip( *iterables)
> ifilter( predicate, iterable)
> islice( iterable, [start,] stop [, step])
>
> I use once in whil
On Dec 30, 4:12 pm, Istvan Albert <[EMAIL PROTECTED]> wrote:
> On Dec 30, 3:29 am, Marc 'BlackJack' Rintsch <[EMAIL PROTECTED]> wrote:
>
> > One "recipe" is extracting blocks from text files that are delimited by a
> > special start and end line.
>
> Neat solution!
>
> I actually need such function
On Dec 30, 3:29 am, Marc 'BlackJack' Rintsch <[EMAIL PROTECTED]> wrote:
> One "recipe" is extracting blocks from text files that are delimited by a
> special start and end line.
Neat solution!
I actually need such functionality every once in a while.
Takewhile + dropwhile to the rescue!
i.
--
On Sat, 29 Dec 2007 15:10:24 -0800, Raymond Hettinger wrote:
> These thoughts reflect my own experience with the itertools module.
> It may be that your experience with them has been different. Please
> let me know what you think.
I seem to be in a minority here as I use both functions from time
On Dec 30, 12:10 am, Raymond Hettinger <[EMAIL PROTECTED]> wrote:
> I'm considering deprecating these two functions and would like some
> feedback from the community or from people who have a background in
> functional programming.
I am with Steven D'Aprano when he says that takewhile and dropwhi
Almost every day I write code that uses itertools, so I find it very
useful, and its functions fast.
Removing useless things and keeping things tidy is often positive. But
I can't tell you what to remove. Here are my usages (every sub-list is
sorted by inverted frequency usage):
I use often or ver
On Sat, 29 Dec 2007 15:10:24 -0800, Raymond Hettinger wrote:
> * Both functions seem simple and basic until you try to explain them to
> someone else.
Oh I don't know about that. The doc strings seem to do an admirable job
to me. Compared to groupby(), the functions are simplicity themselves.
On Dec 29, 6:10 pm, Raymond Hettinger <[EMAIL PROTECTED]> wrote:
> These thoughts reflect my own experience with the itertools module.
> It may be that your experience with them has been different. Please
> let me know what you think.
first off, the itertools module is amazing, thanks for creati
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