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
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 with
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 the
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 programming.
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, 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 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 functionality every
[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 while:
cycle(
[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
[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),
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:
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):
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 clarify
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 clarify it.
* I originally added them
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 creating
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.
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
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 dropwhile
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