[issue23787] sum() function docstring lists arguments incorrectly

Mariatta Wijaya added the comment: Raymond's patch has been applied to 2.7 branch. Thanks :) -- resolution: -> fixed stage: patch review -> resolved status: open -> closed ___ Python tracker

[issue23787] sum() function docstring lists arguments incorrectly

Mariatta Wijaya added the comment: New changeset 536209ef92f16ea8823209a3c4b8763c0ec5d4bc by Mariatta in branch '2.7': bpo-23787: Change sum() docstring from sequence to iterable (GH-1859) https://github.com/python/cpython/commit/536209ef92f16ea8823209a3c4b8763c0ec5d4bc --

[issue23787] sum() function docstring lists arguments incorrectly

Changes by Mariatta Wijaya : -- stage: -> patch review ___ Python tracker ___ ___

[issue23787] sum() function docstring lists arguments incorrectly

Changes by Mariatta Wijaya : -- pull_requests: +1942 ___ Python tracker ___ ___

[issue23787] sum() function docstring lists arguments incorrectly

Raymond Hettinger added the comment: I believe this is just a 2.7 issue. -- versions: -Python 3.5, Python 3.6, Python 3.7 ___ Python tracker ___

[issue23787] sum() function docstring lists arguments incorrectly

Changes by Mariatta Wijaya : -- assignee: docs@python -> Mariatta nosy: +Mariatta versions: +Python 3.5, Python 3.6, Python 3.7 ___ Python tracker

[issue23787] sum() function docstring lists arguments incorrectly

Raymond Hettinger added the comment: [Serhiy] > Raymond, could you open a pull request? Perhaps you could do it for me. I still haven't had time to wrestle with the github switchover, so I'm effectively crippled for a while. [Valentine] > Seems like mentioning string was really a bad idea

[issue23787] sum() function docstring lists arguments incorrectly

Serhiy Storchaka added the comment: Raymond, could you open a pull request? -- keywords: +easy nosy: +serhiy.storchaka priority: normal -> low status: open -> pending ___ Python tracker

[issue23787] sum() function docstring lists arguments incorrectly

Valentine Sinitsyn added the comment: Seems like mentioning string was really a bad idea. They were only used as (poor) example, forget them if they are confusing in any way. In my understanding, any sequence in Python is iterable, bit not all iterables are sequences (correct me if I'm

[issue23787] sum() function docstring lists arguments incorrectly

Wolfgang Maier added the comment: This implies sum() should accept str, unicode, list, tuple, bytearray, buffer, and xrange. and in fact it *does* accept all these as input. It just refuses to add the elements of the sequence if these elements are of certain types. Of course, the elements of

[issue23787] sum() function docstring lists arguments incorrectly

New submission from Valentine Sinitsyn: sum() function doctstring describes expected arguments as follows (Python 2.7.6): sum(...) sum(sequence[, start]) - value ... This implies sum() should accept str, unicode, list, tuple, bytearray, buffer, and xrange. However, you clearly can't use

[issue23787] sum() function docstring lists arguments incorrectly

R. David Murray added the comment: In python3 the docstring does say iterable. It wouldn't be a bad thing to change it in 2.7, but it is not much of a priority. iterable vs sequence makes no difference to the str question: a string is an iterable. The docstring explicitly says strings are

[issue23787] sum() function docstring lists arguments incorrectly

Valentine Sinitsyn added the comment: Yes, strings aren't an issue. I only used them as an example. I came across this issue during code review, discussing if it is okay to pass generator expression to sum() (like sum(x*2 for x in xrange(5)) or is it better to convert it to the list first

[issue23787] sum() function docstring lists arguments incorrectly

Changes by Raymond Hettinger raymond.hettin...@gmail.com: -- keywords: +patch Added file: http://bugs.python.org/file38716/sum_doc.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23787

Re: Simple recursive sum function | what's the cause of the weird behaviour?

I read through all of the posts and thanks for helping. What was supposed to be simple a (recursively) straightforward, turned out to be quite tricky. I've set up a small testing bench and tried all of the proposed solutions including my own but none pass. I'll post it below. I've also

Re: Simple recursive sum function | what's the cause of the weird behaviour?

I got it! One of the testcases was wrong, ([[1], [1]],[1],[1, 1]), should be ([[1], [1]],[1],[1, 1, 1]), And the working solution. def supersum(sequence, start=0): result = start start = type(start)() for item in sequence: try:

Simple recursive sum function | what's the cause of the weird behaviour?

I know this is simple but I've been starring at it for half an hour and trying all sorts of things in the interpreter but I just can't see where it's wrong. def supersum(sequence, start=0): result = start for item in sequence: try: result += supersum(item, start)

Re: Simple recursive sum function | what's the cause of the weird behaviour?

Nevermind! Stupid of me to forget that lists or mutable so result and start both point to the same list. -- http://mail.python.org/mailman/listinfo/python-list

Re: Simple recursive sum function | what's the cause of the weird behaviour?

Since I've already wasted a thread I might as well... Does this serve as an acceptable solution? def supersum(sequence, start=0): result = type(start)() for item in sequence: try: result += supersum(item, start) except: result += item return

Re: Simple recursive sum function | what's the cause of the weird behaviour?

Russel Walker wrote: Since I've already wasted a thread I might as well... Does this serve as an acceptable solution? def supersum(sequence, start=0): result = type(start)() for item in sequence: try: result += supersum(item, start) except:

Re: Simple recursive sum function | what's the cause of the weird behaviour?

On Sat, Jul 6, 2013 at 10:37 PM, Russel Walker russ.po...@gmail.com wrote: This works: - - - - - - x = [[1], [2], [3]] supersum(x) 6 supersum(x, []) [1, 2, 3] This does not: - - - - - - - x = [[[1], [2]], [3]] supersum(x, []) [1, 2, 1, 2, 3] You have a problem of specification

Re: Simple recursive sum function | what's the cause of the weird behaviour?

On 6 July 2013 13:59, Russel Walker russ.po...@gmail.com wrote: Since I've already wasted a thread I might as well... Does this serve as an acceptable solution? def supersum(sequence, start=0): result = type(start)() for item in sequence: try: result +=

Re: Simple recursive sum function | what's the cause of the weird behaviour?

On 7/6/2013 8:37 AM, Russel Walker wrote: I know this is simple but I've been starring at it for half an hour and trying all sorts of things in the interpreter but I just can't see where it's wrong. def supersum(sequence, start=0): result = start for item in sequence: try:

Re: Simple recursive sum function | what's the cause of the weird behaviour?

On 06/07/2013 19:43, Joshua Landau wrote: On 6 July 2013 13:59, Russel Walker russ.po...@gmail.com wrote: Since I've already wasted a thread I might as well... Does this serve as an acceptable solution? def supersum(sequence, start=0): result = type(start)() for item in sequence:

Re: Simple recursive sum function | what's the cause of the weird behaviour?

On 06/07/2013 21:10, Rotwang wrote: [...] It's not quite clear to me what the OP's intentions are in the general case, but calling supersum(item, start) seems odd - for example, is the following desirable? supersum([[1], [2], [3]], 4) 22 I would have thought that the correct answer would be

Re: sum function

On Saturday, 6 October 2012 02:09:56 UTC+5:30, Dave Angel wrote: On 10/05/2012 04:09 PM, Mike wrote: Terry, I am not using the mail client. I am just posting on the site. And which site would that be (that you're using)? There are a few. I'm guessing you use

Re: sum function

On Friday, 5 October 2012 07:31:24 UTC+5:30, Mike wrote: I agree with you, Ian. Thanks for all the help. Now I get the below error. File test.py, line 17, in module total = sum(float(col.value) for r in iter(next_r, None) for col in r[0].columns.itervalues()) File

Re: sum function

On Thursday, October 4, 2012 4:52:50 PM UTC-4, Mike wrote: Hi All, I am new to python and am getting the data from hbase. I am trying to do sum on the column as below scanner = client.scannerOpenWithStop(tab, 10, 1000, [cf:col1]) total = 0.0 r =

Re: sum function

On Friday, 5 October 2012 19:09:15 UTC+5:30, Mike wrote: On Thursday, October 4, 2012 4:52:50 PM UTC-4, Mike wrote: Hi All, I am new to python and am getting the data from hbase. I am trying to do sum on the column as below scanner =

Re: sum function

On Friday, October 5, 2012 9:41:44 AM UTC-4, Ramchandra Apte wrote: On Friday, 5 October 2012 19:09:15 UTC+5:30, Mike wrote: On Thursday, October 4, 2012 4:52:50 PM UTC-4, Mike wrote: Hi All, I am new to python and am getting the data from

Re: sum function

On 10/5/2012 9:47 AM, Mike wrote: On Friday, October 5, 2012 9:41:44 AM UTC-4, Ramchandra Apte wrote: On Friday, 5 October 2012 19:09:15 UTC+5:30, Mike wrote: On Thursday, October 4, 2012 4:52:50 PM UTC-4, Mike wrote: Hi All, I am new to python and am

Re: sum function

On Fri, Oct 5, 2012 at 7:39 AM, Mike mike20...@gmail.com wrote: Sorry about that. Here you go Traceback (most recent call last): File test.py, line 17, in module total = sum(float(col.value) for r in iter(next_r, None) for col in r[0].columns.itervalues()) File test.py, line 17, in

Re: sum function

I added the print command. It prints [] when there is no data. Thanks -- http://mail.python.org/mailman/listinfo/python-list

Re: sum function

Terry, I am not using the mail client. I am just posting on the site. Something wrong with this site. When you do individual reply, it does the double posting which it shouldn't. See Ramachandra Apte's reply. It is posted twice too. Thanks --

Re: sum function

On Fri, Oct 5, 2012 at 2:03 PM, Mike mike20...@gmail.com wrote: I added the print command. It prints [] when there is no data. Change iter(next_r, None) to iter(next_r, []) -- http://mail.python.org/mailman/listinfo/python-list

Re: sum function

On 10/05/2012 04:09 PM, Mike wrote: Terry, I am not using the mail client. I am just posting on the site. And which site would that be (that you're using)? There are a few. I'm guessing you use google-groups. And all of them get gatewayed to the actual list, with differing numbers of bugs.

Re: sum function

That worked, Ian. Thanks -- http://mail.python.org/mailman/listinfo/python-list

sum function

Hi All, I am new to python and am getting the data from hbase. I am trying to do sum on the column as below scanner = client.scannerOpenWithStop(tab, 10, 1000, [cf:col1]) total = 0.0 r = client.scannerGet(scanner) while r: for k in (r[0].columns): total += float(r[0].columns[k].value)

Re: sum function

On Thu, Oct 4, 2012 at 2:52 PM, mike20...@gmail.com wrote: scanner = client.scannerOpenWithStop(tab, 10, 1000, [cf:col1]) total = 0.0 r = client.scannerGet(scanner) while r: for k in (r[0].columns): total += float(r[0].columns[k].value) r = client.scannerGet(scanner) print total

Re: sum function

On Thu, Oct 4, 2012 at 3:04 PM, Ian Kelly ian.g.ke...@gmail.com wrote: scanner = client.scannerOpenWithStop(tab, 10, 1000, [cf:col1]) next_r = itertools.partial(client.scannerGet, scanner) total = sum(float(col.value) for r in iter(next_r, None) for col in r.itervalues()) That should be

Re: sum function

I get below error NameError: name 'functools' is not defined Thanks -- http://mail.python.org/mailman/listinfo/python-list

Re: sum function

Thanks Ian for the quick reply. I get the below error. NameError: name 'itertools' is not defined Thanks -- http://mail.python.org/mailman/listinfo/python-list

Re: sum function

On 10/04/2012 05:29 PM, Mike wrote: I get below error NameError: name 'functools' is not defined functools is a module in the standard library. You need to import it. import functools -- DaveA -- http://mail.python.org/mailman/listinfo/python-list

Re: sum function

On Fri, Oct 5, 2012 at 7:29 AM, Mike mike20...@gmail.com wrote: I get below error NameError: name 'functools' is not defined Thanks functools is a module: import functools ChrisA -- http://mail.python.org/mailman/listinfo/python-list

Re: sum function

On Thursday, October 4, 2012 5:40:26 PM UTC-4, Dave Angel wrote: On 10/04/2012 05:29 PM, Mike wrote: I get below error NameError: name 'functools' is not defined functools is a module in the standard library. You need to import it. import functools --

Re: sum function

On Thu, Oct 4, 2012 at 6:40 PM, Mike mike20...@gmail.com wrote: Traceback (most recent call last): File test.py, line 16, in module total = sum(float(col.value) for r in iter(next_r, None) for col in r.itervalues()) File test.py, line 16, in genexpr total = sum(float(col.value)

Re: sum function

I agree with you, Ian. Thanks for all the help. Now I get the below error. File test.py, line 17, in module total = sum(float(col.value) for r in iter(next_r, None) for col in r[0].columns.itervalues()) File test.py, line 17, in genexpr total = sum(float(col.value) for r in