Re: should self be changed?

[Chris Angelico]

On Wed, May 27, 2015 at 5:39 PM, Marko Rauhamaa ma...@pacujo.net wrote:
 Chris Angelico ros...@gmail.com:

 Using some other name in place of self should definitely remain
 *possible*, but not commonly done.

 You are effectively making the argument that Python has made a mistake
 by not giving self a special, language-level status.

Uhh... no I'm not. I'm saying it should be possible to use some other
name instead of self, which means that Python got it right by not
making it special.

ChrisA
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[issue23790] When xdrlib.Packer().pack_string() fails, the Packer is corrupted

[Serhiy Storchaka]

Changes by Serhiy Storchaka storch...@gmail.com:


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[issue23970] Update distutils.msvccompiler for VC14

[Marc-Andre Lemburg]

Marc-Andre Lemburg added the comment:

I was away the last few days, so just found the changes now.

IMO, it's a good idea to use a new module for the new compiler, but don't think 
it's a good idea to make the whole module private, since this implicitly 
disallows sub-classing the compiler class going forward, which people will need 
to do sooner or later.

Why not rename the module to msvc14compiler (or some other public name) instead 
?

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[issue23914] pickle fails with SystemError

[Serhiy Storchaka]

Changes by Serhiy Storchaka storch...@gmail.com:


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[issue17941] namedtuple should support fully qualified name for more portable pickling

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

 That will not work correctly if the module name has a dot in it.

Pickling qualified names with arbitrary number of dots is supported in 3.4 with 
protocol 4 and in 3.5 with all protocols (backward compatibly).

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Re: should self be changed?

[Ben Finney]

Steven D'Aprano steve+comp.lang.pyt...@pearwood.info writes:

 On Wednesday 27 May 2015 14:39, Ben Finney wrote:

  That kind of homophobic slur is inappropriate from anyone in this
  community. Kindly cut it out altogether.

 I look forward to the day when people would read the earlier insult
 and be perplexed as to why it is a slur at all. In the same way as
 your mother wears army boots has become a joke slur, not taken
 seriously.

Yes, let's all work toward an end to the use of gender, sexuality,
ethnicity, and other inborn traits as the punchline of insults or jokes.

Until that happy day, let's work to improve the lot of those who are
made the butt of such slurs. Part of that work must be to call foul when
someone invokes an entire class of people as an insult.

-- 
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  `\Brain, but why would anyone want to see Snow White and the |
_o__)   Seven Samurai?” —_Pinky and The Brain_ |
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Re: Fwd: Lossless bulletproof conversion to unicode (backslashing)

[anatoly techtonik]

On Wed, May 27, 2015 at 2:35 PM, Laura Creighton l...@openend.se wrote:
 I am missing something.  Why do you need unicode at all?  Why can you
 not just keep your binary data as binary data?

Good question. From the SCons code I see that we need unicode, because
we switched to io.StringIO which is advertised as the future (and Python 3
way of doing things, because Python 3 doesn't have non-unicode StringIO).

A really deep and exhaustive answer.
advertisement (first link on StringIO vs io.StringIO):
http://stackoverflow.com/questions/3410309/what-is-the-difference-between-stringio-and-io-stringio-in-python2-7
peaceful details
https://bitbucket.org/scons/scons/commits/05d5af305a5d
gory consequences
https://bitbucket.org/scons/scons/pull-request/235/fix-tree-all-print-when-build-tree

 I feel like I must be missing something obvious here ...

Not that obvious as it appears.
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Re: SyntaxError on progress module

[Chris Angelico]

On Wed, May 27, 2015 at 5:30 PM, alb al.bas...@gmail.com wrote:
 But here I have another question, as a python novice is there really any
 reason for me to use any particular version of Python?

 Should I start directly with the newest? What about 2.7?


Start with the newest that's conveniently available. With Debian
Jessie, Python 3.4.2 is a simple apt-get away, so that's pretty
convenient.

ChrisA
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[issue22955] Pickling of methodcaller, attrgetter, and itemgetter

[Serhiy Storchaka]

Changes by Serhiy Storchaka storch...@gmail.com:


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[issue24259] tar.extractall() does not recognize unexpected EOF

[Thomas Guettler]

Thomas Guettler added the comment:

Who has enough knowledge of the tarfile module to create a good patch?

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[issue24295] Backport of #17086 causes regression in setup.py

[Moritz Sichert]

New submission from Moritz Sichert:

In 7955d769fdf5 a bug of #14330 got fixed and it got backported for 2.7.
But these changes were reverted by another backport in 8ee6d96a1019 (which was 
a backport for #17086).

The issue here is that right know setup.py looks for ssl and other libs' 
headers in /usr/include *first* before it searches in /usr/local/include.
That makes it really hard to compile python with a setup where you have a newer 
version of openssl in /usr/local than the one in /usr.

--
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keywords: patch
messages: 244154
nosy: moritzs
priority: normal
severity: normal
status: open
title: Backport of #17086 causes regression in setup.py
type: compile error
versions: Python 2.7
Added file: http://bugs.python.org/file39515/setup_regression.patch

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Re: Fwd: Lossless bulletproof conversion to unicode (backslashing)

[Laura Creighton]

I am missing something.  Why do you need unicode at all?  Why can you
not just keep your binary data as binary data?

I feel like I must be missing something obvious here ...

Laura

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Re: SyntaxError on progress module

[Cecil Westerhof]

Op Wednesday 27 May 2015 09:30 CEST schreef alb:

 But here I have another question, as a python novice is there really
 any reason for me to use any particular version of Python?

 Should I start directly with the newest? What about 2.7?

In principal you should use the ‘latest’ 3. The only problem is that a
lot of libraries are not converted to 3 yet. If you need one of those,
then you have ‘no choice’ and have to use 2.7. But I would recommend
to use ‘from __future__' to make the 2.7 code as much as possible 3
compliant.

-- 
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LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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[issue23513] Add support for classes/object model in multiprocessing/pickle

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Could you please provide full example that you want to work and test it in 
Python 3.5? I suppose your issue is fixed in 3.5.

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Fwd: Lossless bulletproof conversion to unicode (backslashing)

[anatoly techtonik]

Hi.

This was labelled offtopic in python-ideas, so I edited and forwarded
it here. Please CC as I am not subscribed.


In short. I need is a bulletproof way to convert from anything to
unicode. This requires some kind of escaping to go forward and back.
Some helper function like u2b() (unicode to binary) and b2u() (that
also removes escaping). So far I can't find any code that does just
that.


Background story. I need to print SCons graph. SCons is a build tool,
so it has a graph of nodes - what depends on what. I have no idea
what a node object could be. I know only that it can have human
readable representation. Sometimes node is a filename in some
encoding that is not utf-8, and without knowing the encoding,
converting it to unicode is not possible without loosing the information
about that filename.

So, here is what Python proposes:

https://docs.python.org/2.7/library/functions.html?highlight=unicode#unicode

unicode() type constructor that doesn't allow you to do conversion
without losing the data. It offers only two basic strategies - crash or
corrupt:

1. ignore  - meaning skip and corrupt the data
2. replace  - just corrupt the data
3. strict - just crash

Python design leaves the decision how to implement safe
interoperability to you, and that's basically the reason why Python 3
fails. Without a safe approach (get my binary data back frum that
unicode) people just can't wrap their heads around that.

Python design assumes that people know the encoding of data they
are processing, but that's not true in many cases. The data may also
be just broken or invalid. So, the real world coding assumptions are:

1. external data encoding is unknown or varies
2. external data has binary chunks that are invalid for
conversion to unicode

In real world UnicodeDecode crashes is not an option for deal with
unknown or broken and invalid input (such as when I need to print
human representation of Node to the screen). In many (most?)
situations lossless garbage is more welcome than crash or dataloss
and that should be a default behaviour.


The solution is to have filter preprocess the binary string to escape all
non-unicode symbols so that the following lossless transformation
becomes possible:

   binary - escaped utf-8 string - unicode - binary

I want to know if that's real? I need to accomplish that with
Python 2.x, but the use case is probably valid for Python 3 as well.

This stuff is critical to port SCons to Python 3.x and I expect for other
similar tools that have to deal with unknown ascii-binary strings too.

-- 
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[issue18032] Optimization for set/frozenset.issubset()

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

In C implementation no need to create set object seen. More efficient way is to 
use bit array.

Here is a patch that uses this approach.

./python -m timeit -s s1 = set(range(1000)) s1.issubset(range(1000))
Unpatched  : 1 loops, best of 3: 115 usec per loop
bru's patch: 1 loops, best of 3: 114 usec per loop
My patch   : 1 loops, best of 3: 92.6 usec per loop

./python -m timeit -s s1 = set(range(1000)) s1.issubset(range(1, 1000))
Unpatched  : 1 loops, best of 3: 73.4 usec per loop
bru's patch: 1 loops, best of 3: 114 usec per loop
My patch   : 1 loops, best of 3: 93 usec per loop

./python -m timeit -s s1 = set(range(100)) s1.issubset(range(1, 1000))
Unpatched  : 1 loops, best of 3: 73.6 usec per loop
bru's patch: 1 loops, best of 3: 89 usec per loop
My patch   : 1 loops, best of 3: 62.4 usec per loop

./python -m timeit -s s1 = set(range(100)) s1.issubset(range(1000))
Unpatched  : 1 loops, best of 3: 75.5 usec per loop
bru's patch: 10 loops, best of 3: 8.77 usec per loop
My patch   : 10 loops, best of 3: 5.34 usec per loop

./python -m timeit -s s1 = set('a'); s2 = ['a'] + ['b'] * 1 
s1.issubset(s2)
Unpatched  : 1000 loops, best of 3: 326 usec per loop
bru's patch: 100 loops, best of 3: 0.394 usec per loop
My patch   : 100 loops, best of 3: 0.409 usec per loop

./python -m timeit -s s1 = set('a'); from itertools import repeat 
s1.issubset(repeat('a'))
Unpatched  : NEVER FINISHES
bru's patch: 100 loops, best of 3: 0.794 usec per loop
My patch   : 100 loops, best of 3: 0.725 usec per loop

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[issue23574] datetime: support leap seconds

[Marc-Andre Lemburg]

Marc-Andre Lemburg added the comment:

Here's what mxDateTime uses:

 import mx.DateTime

 t1 = mx.DateTime.DateTime(2012,6,30,23,59,60)
 t2 = mx.DateTime.DateTime(2012,7,1,0,0,0)

 t1
mx.DateTime.DateTime object for '2012-06-30 23:59:60.00' at 7fbb36008d68
 t2
mx.DateTime.DateTime object for '2012-07-01 00:00:00.00' at 7fbb36008d20

 t2-t1
mx.DateTime.DateTimeDelta object for '00:00:00.00' at 7fbb35ff0540
 (t2-t1).seconds
0.0

 t1 + mx.DateTime.oneSecond
mx.DateTime.DateTime object for '2012-07-01 00:00:01.00' at 7fbb360083d8

It preserves the broken down values, but uses POSIX days of 86400 seconds per 
day to calculate time deltas.

It's a compromise, not a perfect solution, but it prevents applications from 
failing for that one second every now and then.

I don't believe there is a perfect solution, since what your application or 
users expect may well be different. All I can say is that raising exceptions in 
these rare cases is not what your users typically want :-)

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Re: Fwd: Lossless bulletproof conversion to unicode (backslashing)

[Chris Angelico]

On Wed, May 27, 2015 at 9:52 PM, anatoly techtonik techto...@gmail.com wrote:
 And the short answer is that we need unicode because we are printing this
 information to the stdout, and stdout is opened in text mode at least on
 Windows, and without explicit conversion, Python will try to decode stuff
 as being `ascii` and fail anyway.

So you're working with text. That means you HAVE to decode it somehow;
you fundamentally cannot print bytes to the console. Lossless
concealment of arbitrary bytes won't help you. If you can't adequately
decode everything, either backslash-escape the rest, or use a
replacement character; you can't print out those bytes.

And no, I will not cc you. Subscribe to the list if you're going to
ask a question.

ChrisA
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[issue18032] Optimization for set/frozenset.issubset()

[Bruno Cauet]

Bruno Cauet added the comment:

Serhiy, that sounds good but I think that you have forgotten to attach the 
mentioned patch.

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Re: should self be changed?

[Todd]

On Wed, May 27, 2015 at 2:40 PM, zipher dreamingforw...@gmail.com wrote:

 On Wednesday, May 27, 2015 at 6:30:16 AM UTC-5, Ben Finney wrote:
  Steven D'Aprano steve+comp.lang.pyt...@pearwood.info writes:
 
   On Wednesday 27 May 2015 14:39, Ben Finney wrote:
  
That kind of homophobic slur is inappropriate from anyone in this
community. Kindly cut it out altogether.
  
   I look forward to the day when people would read the earlier insult
   and be perplexed as to why it is a slur at all. In the same way as
   your mother wears army boots has become a joke slur, not taken
   seriously.
 
  Yes, let's all work toward an end to the use of gender, sexuality,
  ethnicity, and other inborn traits as the punchline of insults or jokes.

 Oh God, you people are being idiots.  It's poop. And shall we all so look
 forward to the day, when people who eat poop are also welcome into the
 circle of humanity?

 Everyday, you let atrocity happen, and you're fighting for oppressed
 feltchers?

 If so, you dumbasses don't deserve much of a future.


If your goal is to get people to stop calling you a troll, you are going
about it the wrong way.  If it isn't, why are you even here?  Please
remember the first rule of holes: if you find yourself in a hole, stop
digging.
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Re: SyntaxError on progress module

[Mark Lawrence]

On 27/05/2015 09:42, Cecil Westerhof wrote:

Op Wednesday 27 May 2015 09:30 CEST schreef alb:


But here I have another question, as a python novice is there really
any reason for me to use any particular version of Python?

Should I start directly with the newest? What about 2.7?


In principal you should use the ‘latest’ 3. The only problem is that a
lot of libraries are not converted to 3 yet. If you need one of those,
then you have ‘no choice’ and have to use 2.7. But I would recommend
to use ‘from __future__' to make the 2.7 code as much as possible 3
compliant.



Please define a lot whilst bearing in mind green against red here 
https://python3wos.appspot.com/


--
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what you can do for our language.

Mark Lawrence

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[issue24294] DeprecationWarnings should be visible by default in the interactive REPL

[Martin Panter]

Martin Panter added the comment:

I have learnt to run the interactive interpeter (and also most of my own 
scripts) with the -b -Wall options. But having these switched on automatically 
may not be a bad thing.

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[issue24296] Queue documentation note needed

[Sandy Chapman]

New submission from Sandy Chapman:

The example at the bottom of the following page should have a warning added:

https://docs.python.org/2/library/queue.html

The warning should be such that the user is informed that the threads in the 
example are not cleaned up and will continue to run. Any future additions to 
the queue will then be processed immediately by those threads.

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messages: 244156
nosy: Sandy Chapman, docs@python
priority: normal
severity: normal
status: open
title: Queue documentation note needed

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[issue23275] Can assign [] = (), but not () = []

[Rahul Gupta]

Rahul Gupta added the comment:

isn't it logical?

[] is a mutable data structure
while () is a immutable data structure

(b, a) = [1, 2] is fine because a and b are mutable

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[issue24297] Lib/symbol.py is out of sync with Grammar/Grammar

[R. David Murray]

R. David Murray added the comment:

It is automatically generated in that it isn't hand-written.  On the other 
hand, it isn't automatically generated in the sense of being part of the make 
process, ./python symbol.py is supposed to be run by hand when it is 
appropriate.

A bit ago someone wrote tests for keyword.py that among other things made sure 
we didn't forget to update it when needed.  Someone needs to write a similar 
test for symbol, it looks like.

Whether or not one or both of these could be/should be incorporated into make 
(now that we have 'make touch' to deal with the consequences) is a separate 
question.  As to why it is checked in, we check in almost all the build 
artifacts previous to the compile stage, so that there is no need to have an 
already-built python to build python from source.

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Re: Fwd: Lossless bulletproof conversion to unicode (backslashing)

[anatoly techtonik]

On Wed, May 27, 2015 at 2:47 PM, anatoly techtonik techto...@gmail.com wrote:
 On Wed, May 27, 2015 at 2:35 PM, Laura Creighton l...@openend.se wrote:
 I am missing something.  Why do you need unicode at all?  Why can you
 not just keep your binary data as binary data?

 Good question. From the SCons code I see that we need unicode, because
 we switched to io.StringIO which is advertised as the future (and Python 3
 way of doing things, because Python 3 doesn't have non-unicode StringIO).

 A really deep and exhaustive answer.
 advertisement (first link on StringIO vs io.StringIO):
 http://stackoverflow.com/questions/3410309/what-is-the-difference-between-stringio-and-io-stringio-in-python2-7
 peaceful details
 https://bitbucket.org/scons/scons/commits/05d5af305a5d
 gory consequences
 https://bitbucket.org/scons/scons/pull-request/235/fix-tree-all-print-when-build-tree

 I feel like I must be missing something obvious here ...

 Not that obvious as it appears.

And the short answer is that we need unicode because we are printing this
information to the stdout, and stdout is opened in text mode at least on
Windows, and without explicit conversion, Python will try to decode stuff
as being `ascii` and fail anyway.
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Re: should self be changed?

[zipher]

On Wednesday, May 27, 2015 at 6:30:16 AM UTC-5, Ben Finney wrote:
 Steven D'Aprano steve+comp.lang.pyt...@pearwood.info writes:
 
  On Wednesday 27 May 2015 14:39, Ben Finney wrote:
 
   That kind of homophobic slur is inappropriate from anyone in this
   community. Kindly cut it out altogether.
 
  I look forward to the day when people would read the earlier insult
  and be perplexed as to why it is a slur at all. In the same way as
  your mother wears army boots has become a joke slur, not taken
  seriously.
 
 Yes, let's all work toward an end to the use of gender, sexuality,
 ethnicity, and other inborn traits as the punchline of insults or jokes.

Oh God, you people are being idiots.  It's poop. And shall we all so look 
forward to the day, when people who eat poop are also welcome into the circle 
of humanity? 

Everyday, you let atrocity happen, and you're fighting for oppressed feltchers?

If so, you dumbasses don't deserve much of a future.

Mark
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Re: a more precise distance algorithm

[Robin Becker]

A minor point is that if you just need to compare distances you don't need to 
compute the hypotenuse, its square will do so no subtractions etc etc.

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[issue24294] DeprecationWarnings should be visible by default in the interactive REPL

[Ezio Melotti]

Changes by Ezio Melotti ezio.melo...@gmail.com:


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[issue24294] DeprecationWarnings should be visible by default in the interactive REPL

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

See discussion on Python-Ideas [1].

[1] http://comments.gmane.org/gmane.comp.python.ideas/32191

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[issue24296] Queue documentation note needed

[R. David Murray]

R. David Murray added the comment:

If you know anything about threads you can see that the threads are not 
explicitly shut down.  As a standalone example it is correct, in that they 
get shut down at interpreter shutdown.

I'm not sure it is appropriate to include what is essentially a thread tutorial 
note in the queue docs.  A crosslink to threading would certainly be a good 
idea; perhaps the introductory sentence could be tweaked to point people who 
don't already know threads in the correct direction for enlightenment.

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Accessing DataSocket Server with Python

[Garrone, Corrado]

Dear Python Team,

currently I am working on a research project for my bachelor degree. A
LabVIEW application is used for current and power measurements, whereas the
measured data are sent to DataSocket Server, a technology by National
Instruments used for data exchange between computers and applications.
DataSocket is based on TCP/IP and thus requesting data from DataSocket
should be similar to an internet request.
I know with the socket library in Python it is possible with to establish
sockets, send internet requests and communicate between clients and
servers.
Is there a possibility to access NI DataSocket and get measurement data
with Python on the same computer where Python is installed and the codes
are executed? Can you maybe send me an example code where such a connection
with DataSocket is established?

If you got any queries, please do not hesitate to contact me.

Thank you very much for your efforts.

Kind regards,

 *Corrado Garrone*
DH-Student Fachrichtung Elektrotechnik / Co-op Student B.Eng. Electrical
Engineering

Roche Diagnostics GmbH
DFGHMV8Y6164
Sandhofer Strasse 116
68305 Mannheim / Germany

Phone: apprentice
mailto:corrado.garr...@roche.com corrado.garr...@roche.com

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[issue23275] Can assign [] = (), but not () = []

[Martin Panter]

Martin Panter added the comment:

I prefer to unpack into square brackets in general because it is a mnemonic for 
the star argument being a list:

 (a, *b) = range(3)
 a
0
 b  # A list, even though it was unpacked using tuple-like syntax
[1, 2]

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[issue24297] Lib/symbol.py is out of sync with Grammar/Grammar

[Marius Gedminas]

New submission from Marius Gedminas:

While investigating 
https://bitbucket.org/pypa/setuptools/issue/388/install-from-sdist-fails-on-python-350b1
 I noticed that Grammar/Grammar changed in 3.5, but Lib/symbol.py wasn't 
updated.

I'm not familiar with the CPython parser, but I suspect that 
adding/removing/splitting grammar rules causes the nonterminal symbol IDs to 
shift, which ought to require an update in symbol.py.

Huh.  Now I see a comment in the file says it is automatically generated, but 
in that case why wasn't that done when I did 'hg pull -u  make  make 
install'?  Why is it checked into source control?

--
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messages: 244160
nosy: mgedmin
priority: normal
severity: normal
status: open
title: Lib/symbol.py is out of sync with Grammar/Grammar
versions: Python 3.5

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Re: Fwd: Lossless bulletproof conversion to unicode (backslashing)

[Steven D'Aprano]

On Wed, 27 May 2015 09:15 pm, anatoly techtonik wrote:

 Hi.
 
 This was labelled offtopic in python-ideas, so I edited and forwarded
 it here. Please CC as I am not subscribed.
 
 
 In short. I need is a bulletproof way to convert from anything to
 unicode. This requires some kind of escaping to go forward and back.

Why do you need to go back? Just keep the node, and use that.


 Some helper function like u2b() (unicode to binary) and b2u() (that
 also removes escaping). So far I can't find any code that does just
 that.


def bytes2unicode(bytes):
# Converts bytes to Unicode, allowing garbage (moji-bake).
return bytes.decode('latin1')

def unicode2bytes(unicode):
# Convert unicode containing garbage (moji-bake) to bytes.
return unicode.encode('latin1')


It correctly does the round trip from any sequence of bytes to unicode and
back to bytes, losslessly:


py import random
py node = bytes([random.randrange(0, 256) for _ in range(10)])
py uni = bytes2unicode(node)
py b = unicode2bytes(uni)
py b == node
True


But take careful note that you can't start with Unicode and still expect to
round-trip losslessly. Many perfectly readable Unicode strings do *not*
convert to bytes:

py unicode2bytes(u'ДЙ')  # two Cyrillic letters
Traceback (most recent call last):
  File stdin, line 1, in module
  File stdin, line 3, in unicode2bytes
UnicodeEncodeError: 'latin-1' codec can't encode characters in position 0-1:
ordinal not in range(256)


That means that if you take a correctly encoded string, it will round-trip,
but it will also display as garbage:

py s = u'ДЙ'
py node = s.encode('utf-8')
py print(node)  # Correctly encoded UTF-8
b'\xd0\x94\xd0\x99'
py node == unicode2bytes(bytes2unicode(node))  # round trips okay
True
py print(repr(bytes2unicode(node)))  # but prints as crap
'Ð\x94Ð\x99'



 Background story. I need to print SCons graph. SCons is a build tool,
 so it has a graph of nodes - what depends on what. I have no idea
 what a node object could be. I know only that it can have human
 readable representation. Sometimes node is a filename in some
 encoding that is not utf-8, and without knowing the encoding,
 converting it to unicode is not possible without loosing the information
 about that filename.

py filename = My Russian ДЙ name  # Unicode
py b = filename.encode('koi8-r')  # Oops, not UTF-8!
py b.decode(utf-8)  # Fails
Traceback (most recent call last):
  File stdin, line 1, in module
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe4 in position 11:
invalid continuation byte
py b.decode(utf-8, errors=replace)  # lossy, but works
'My Russian �� name'
py s = b.decode(utf-8, errors=surrogateescape)  # magic!
py s
'My Russian \udce4\udcea name'


It round-trips as well:

py s.encode(utf-8, errors=surrogateescape) == b
True


Converting this back to Python 2.7 is left as an exercise for the reader.



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Re: Fwd: Lossless bulletproof conversion to unicode (backslashing) (fwd)

[Laura Creighton]

Chris Angelico apparantly has a problem with cc'd people who aren't
on the list.  python-list is very quiet these days, so if you
subscribe it won't be drinking from the firehose.  And you can
always turn off delivery when you are done.  Or you can just
go read the archives: 
https://mail.python.org/pipermail/python-list/2015-May/thread.html

Laura

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t4RC09ap02From: Chris Angelico ros...@gmail.com
Cc: python-list@python.org python-list@python.org


On Wed, May 27, 2015 at 9:52 PM, anatoly techtonik techto...@gmail.com wrote:
 And the short answer is that we need unicode because we are printing this
 information to the stdout, and stdout is opened in text mode at least on
 Windows, and without explicit conversion, Python will try to decode stuff
 as being `ascii` and fail anyway.

So you're working with text. That means you HAVE to decode it somehow;
you fundamentally cannot print bytes to the console. Lossless
concealment of arbitrary bytes won't help you. If you can't adequately
decode everything, either backslash-escape the rest, or use a
replacement character; you can't print out those bytes.

And no, I will not cc you. Subscribe to the list if you're going to
ask a question.

ChrisA
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[issue23275] Can assign [] = (), but not () = []

[Devin Jeanpierre]

Devin Jeanpierre added the comment:

[a, b] = (1, 2) is also fine.

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Re: Fwd: Lossless bulletproof conversion to unicode (backslashing)

[random832]

On Wed, May 27, 2015, at 07:15, anatoly techtonik wrote:
 The solution is to have filter preprocess the binary string to escape all
 non-unicode symbols so that the following lossless transformation
 becomes possible:
 
binary - escaped utf-8 string - unicode - binary
 
 I want to know if that's real? I need to accomplish that with
 Python 2.x, but the use case is probably valid for Python 3 as well.

In Python 3, you could *in principle* use surrogateescape (this would be
more of a binary - escaped unicode workflow), but see below. It is
worth noting that when you *read* posix filenames in unicode form (e.g.
listdir with a unicode argument), they are decoded with surrogateescape,
and can be returned to bytes format with
fn.encode(sys.getfilesystemencoding(), errors='surrogateescape').
However keep in mind that on *windows*, the native filename format is a
sequence of 16-bit WCHAR values, not a sequence of bytes.

 This stuff is critical to port SCons to Python 3.x and I expect for other
 similar tools that have to deal with unknown ascii-binary strings too.

Even if your filename *is* valid UTF-8 (or whatever other encoding), it
might contain invisible control characters that make it difficult to
read. You'd probably be better off simply working directly with the
binary representation, iterating over it and replacing all
non-*ascii*-printable bytes with an escaped representation. As it
happens, the repr() function should work well for doing exactly this.
(note: repr on a *unicode* string in python 3 will pass non-ascii
characters, but ideally you're working with byte strings.)

There's no real need to go beyond this unless you're working in a
problem domain where filenames are likely to legitimately include
non-ascii characters (e.g. user documents of non-technical users who use
languages other than English).
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[issue23970] Update distutils.msvccompiler for VC14

[Steve Dower]

Steve Dower added the comment:

I understood it only disallowed complaining about breaking changes without a 
deprecation cycle :)

I'm sorry I didn't realize you were away. If you have examples of how 
subclassing this class (and not just CCompiler) is useful and does something 
that can't be done through the existing interface, then we'll have something to 
discuss. From past experiences, I now prefer to default to disallow 
inheritance by default, as it isn't a breaking change to allow it again in the 
future but you can't go the other way.

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[issue23275] Can assign [] = (), but not () = []

[Ionel Cristian Mărieș]

Changes by Ionel Cristian Mărieș cont...@ionelmc.ro:


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Re: Fwd: Lossless bulletproof conversion to unicode (backslashing)

[random832]

On Wed, May 27, 2015, at 07:47, anatoly techtonik wrote:
 because Python 3 doesn't have non-unicode StringIO

That's actually not true - the non-unicode equivalent is BytesIO.
However, it's probably not actually what you want, if the point is to
display the filenames to the user.
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[issue18032] Optimization for set/frozenset.issubset()

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Oh, sorry. Here is it.

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[issue23970] Update distutils.msvccompiler for VC14

[Mark Lawrence]

Mark Lawrence added the comment:

If the name is changed I'd like to see something that doesn't reflect the msvc 
version, as my understanding is that from now on the old compatibility issues 
are gone.

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[issue24295] Backport of #17086 causes regression in setup.py

[Matthias Klose]

Matthias Klose added the comment:

I'll look at this in June. I don't think that reverting is the right choice 
here.

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[issue23359] Speed-up set_lookkey()

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Why you have added entry-hash == 0?

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[issue24303] OSError 17 due to _multiprocessing/semaphore.c assuming a one-to-one Pid - process mapping.

[Paul Hobbs]

New submission from Paul Hobbs:

Using pid namespacing it is possible to have multiple processes with the same 
pid.  semlock_new creates a semaphore file with the template 
/dev/shm/mp{pid}-{counter}.  This can conflict if the same semaphore file 
already exists due to another Python process have the same pid.

This bug has been fixed in Python3: https://bugs.python.org/issue8713.  
However, that patch is very large (40 files, ~4.4k changed lines) and only 
incidentally fixes this bug while introducing a large backwards-incompatible 
refactoring and feature addition.

The following small patch to just _multiprocessing/semaphore.c fixes the 
problem by using the system clock and retrying to avoid conflicts:

--- a/Modules/_multiprocessing/semaphore.c
+++ b/Modules/_multiprocessing/semaphore.c
@@ -7,6 +7,7 @@
  */
 
 #include multiprocessing.h
+#include time.h
 
 enum { RECURSIVE_MUTEX, SEMAPHORE };
 
@@ -419,7 +420,7 @@ semlock_new(PyTypeObject *type, PyObject *args, PyObject 
*kwds)
 {
 char buffer[256];
 SEM_HANDLE handle = SEM_FAILED;
-int kind, maxvalue, value;
+int kind, maxvalue, value, try;
 PyObject *result;
 static char *kwlist[] = {kind, value, maxvalue, NULL};
 static int counter = 0;
@@ -433,10 +434,24 @@ semlock_new(PyTypeObject *type, PyObject *args, PyObject 
*kwds)
 return NULL;
 }
 
-PyOS_snprintf(buffer, sizeof(buffer), /mp%ld-%d, (long)getpid(), 
counter++);
+/* With pid namespaces, we may have multiple processes with the same pid.
+ * Instead of relying on the pid to be unique, we use the microseconds time
+ * to attempt to a unique filename. */
+for (try = 0; try  100; ++try) {
+struct timespec tv;
+long arbitrary = clock_gettime(CLOCK_REALTIME, tv) ? 0 : tv.tv_nsec;
+PyOS_snprintf(buffer, sizeof(buffer), /mp%ld-%d-%ld,
+  (long)getpid(),
+  counter++,
+  arbitrary);
+SEM_CLEAR_ERROR();
+handle = SEM_CREATE(buffer, value, maxvalue);
+if (handle != SEM_FAILED)
+break;
+else if (errno != EEXIST)
+goto failure;
+}
 
-SEM_CLEAR_ERROR();
-handle = SEM_CREATE(buffer, value, maxvalue);
 /* On Windows we should fail if GetLastError()==ERROR_ALREADY_EXISTS */
 if (handle == SEM_FAILED || SEM_GET_LAST_ERROR() != 0)
 goto failure;

--
messages: 244211
nosy: Paul Hobbs
priority: normal
severity: normal
status: open
title: OSError 17 due to _multiprocessing/semaphore.c assuming a one-to-one Pid 
- process mapping.
type: enhancement
versions: Python 2.7

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[issue24303] OSError 17 due to _multiprocessing/semaphore.c assuming a one-to-one Pid - process mapping.

[Ned Deily]

Changes by Ned Deily n...@acm.org:


--
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stage:  - patch review

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[issue24299] 2.7.10 test__locale.py change breaks on Solaris

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

This is not the Right Answer because on Linux the thousands-separator for the 
fr_FR locale is a space.

Perhaps better solution would be to specify the UTF-8 encoding for fr_FR locale.

--
assignee:  - serhiy.storchaka
nosy: +lemburg, loewis, serhiy.storchaka
stage:  - patch review
versions: +Python 3.4, Python 3.5, Python 3.6
Added file: http://bugs.python.org/file39523/issue24299-2.7.patch

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[issue24303] OSError 17 due to _multiprocessing/semaphore.c assuming a one-to-one Pid - process mapping.

[Ned Deily]

Changes by Ned Deily n...@acm.org:


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[issue24303] OSError 17 due to _multiprocessing/semaphore.c assuming a one-to-one Pid - process mapping.

[Mike Frysinger]

Changes by Mike Frysinger vap...@users.sourceforge.net:


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[issue24288] Include/opcode.h is modified during building

[Serhiy Storchaka]

Changes by Serhiy Storchaka storch...@gmail.com:


--
assignee:  - serhiy.storchaka
resolution:  - fixed
stage: patch review - resolved
status: open - closed

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[issue24301] gzip module failing to decompress valid compressed file

[Ned Deily]

Ned Deily added the comment:

Can you add a public copy of a file that fails this way?  There are several 
open issues with gzip, like Issue1159051, that might cover this but it's hard 
to know for sure without a test case.

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type: crash - 

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[issue24294] DeprecationWarnings should be visible by default in the interactive REPL

[Thomas Kluyver]

Changes by Thomas Kluyver tak...@gmail.com:


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[issue24295] Backport of #17086 causes regression in setup.py

[Ned Deily]

Changes by Ned Deily n...@acm.org:


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priority: normal - high

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Re: a more precise distance algorithm

[Brian Blais]

On Mon, May 25, 2015 at 11:11 PM, Steven D'Aprano st...@pearwood.info wrote:

 Let's compare three methods.

 def naive(a, b):
 return math.sqrt(a**2 + b**2)

 def alternate(a, b):
 a, b = min(a, b), max(a, b)
 if a == 0:  return b
 if b == 0:  return a
 return a * math.sqrt(1 + b**2 / a**2)


 d1 = naive(a, b)
 d2 = alternate(a, b)
 d3 = math.hypot(a, b)


 which shows that:

 (1) It's not hard to find mismatches;
 (2) It's not obvious which of the three methods is more accurate.


Bottom line: they all suck.  :)

I ran the program you posted, and, like you, got the following two examples:

for fun in [naive, alternate, math.hypot]:
print '%.20f' % fun(222.44802484683657,680.255801504161)

715.70320611153294976248
715.70320611153283607564
715.70320611153283607564

and

for fun in [naive, alternate, math.hypot]:
print '%.20f' % fun(376.47153302262484,943.1877995550265)

1015.54617837194291496417
1015.54617837194280127733
1015.54617837194291496417

but when comparing to Wolfram Alpha, which calculates these out many
more decimal places, we have for the two cases:

715.7032061115328768204988784125331443593766145937358347357252...
715.70320611153294976248
715.70320611153283607564
715.70320611153283607564

1015.546178371942943007625196455666280385821355370154991424749...
1015.54617837194291496417
1015.54617837194280127733
1015.54617837194291496417

where all of the methods deviate at the 13/14 decimal place.



bb


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Python 3.5 crashes on wrong %PYTHONHOME

[Gisle Vanem]

I just installed the 32-bit Python 3.5b4 via the Web-installer.
First, I was a bit annoyed by the fact it installed under
  'f:\ProgramFiler-x86\Python35' instead of
  'f:\ProgramFiler\Python35' as I customided for. But I guess
this is a WOW64 thing. I'm on Win-8.1 (64-bit).

But then I noticed the whole thing crashes when calling
python35!Py_FatalError. On a simple 'python -v' command.

Presumably because my env-var:
 PYTHONHOME=f:\Programfiler\Python27

(and not 'PYTHONHOME=f:\Programfiler\Python35').

Reading the message on this list, gave me the impression
Python 2.7 and Python 3.5 can co-exist with no problem.
Doesn't look the case so far. Is there another 'PYTHONxx'
env-var to override 'PYTHONHOME' in this case? Or what should
I do to keep on using both 27 and 35?

For reference, the call-stack:

  ucrtbase!abort+0x4b
  python35!Py_FatalError+0xbc
  python35!Py_InitializeEx_Private+0x45b
  python35!Py_Main+0x72c
  python+0x11df
  KERNEL32!BaseThreadInitThunk+0x24
  ntdll!__RtlUserThreadStart+0x2f
  ntdll!_RtlUserThreadStart+0x1b

And some of the modules shown in WinDbg:

  ModLoad: 1c47 1c47c000   F:\ProgramFiler\Python35\python.exe
  ModLoad: 7772 7788e000   C:\Windows\SYSTEM32\ntdll.dll
  ModLoad: 7750 7764   C:\Windows\SYSTEM32\KERNEL32.DLL
  ModLoad: 76e2 76ef7000   C:\Windows\SYSTEM32\KERNELBASE.dll
  ModLoad: 6cd5 6d057000   F:\ProgramFiler\Python35\python35.dll
  ModLoad: 6e7e 6e7f5000   C:\Windows\SYSTEM32\VCRUNTIME140.dll

(the new universal CRT from MS)


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Re: different types of inheritence...

[zipher]

On Tuesday, May 26, 2015 at 3:53:25 PM UTC-5, Michael Torrie wrote:
 On 05/26/2015 08:57 AM, zipher wrote:
  Comprende?  I'm not trying to be cryptic here.  This is a bit of OOP
  theory to be discussed.
 
 No, sorry.  Maybe an actual example (with use case) would spur discussion.

In the first example, super_dict changes the behavior of dict *for the user*, 
expanding the API, but keeping all the prior method behaviors the same.  

In the second example, specialized_dict changes the behavior in the machine -- 
the API stays the same so the user of the code just gets new benefits from 
whatever the specialized_dict is improving internally *without changing his/her 
code*.  It's a drop-in replacement.

In other words, the second class changes the INTERNALS of dict.  While the 
first class changes the *externals* of dict.  Yet they both use the same 
class definition, but semantically are completely different.  It's TWO 
different definition of IS-A relationship.  Two definitions of the word is.

m
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Embedded Python. Debug Version and _ctypes

[Uladzimir Kryvian]

Hi!
I'm trying to use embedding of Python in my program.

Simple C-program, compiled in Debug, that uses py-script that just
imports ctypes gives me an error about no module named _ctypes.

How to compile python lib in Visual Studio statically with ctypes
support? Or how to use shared ctypes lib in debug mode?
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Re: Python 3.5 crashes on wrong %PYTHONHOME

[Zachary Ware]

On Wed, May 27, 2015 at 1:13 PM, Gisle Vanem gva...@yahoo.no wrote:
 I just installed the 32-bit Python 3.5b4 via the Web-installer.
 First, I was a bit annoyed by the fact it installed under
   'f:\ProgramFiler-x86\Python35' instead of
   'f:\ProgramFiler\Python35' as I customided for. But I guess
 this is a WOW64 thing. I'm on Win-8.1 (64-bit).

 But then I noticed the whole thing crashes when calling
 python35!Py_FatalError. On a simple 'python -v' command.

 Presumably because my env-var:
  PYTHONHOME=f:\Programfiler\Python27

 (and not 'PYTHONHOME=f:\Programfiler\Python35').

 Reading the message on this list, gave me the impression
 Python 2.7 and Python 3.5 can co-exist with no problem.
 Doesn't look the case so far. Is there another 'PYTHONxx'
 env-var to override 'PYTHONHOME' in this case? Or what should
 I do to keep on using both 27 and 35?

Is there any particular reason you're setting PYTHONHOME in the first
place?  It shouldn't be necessary unless you're doing something
abnormal.  I'd try unsetting it entirely and see if things just work.

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Yury Selivanov]

Yury Selivanov added the comment:

But why was it building just fine before this commit? I haven't updated my 
system packages in a while.

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Steve Dower]

Steve Dower added the comment:

Those macros are only included if Py_BUILD_CORE is defined, regardless of 
platform (see Include/pyport.h).

Is it possible that's being undefined somehow?

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Steve Dower]

Steve Dower added the comment:

Looking at a `grep PY_CORE_CFLAGS`, that sounds reasonable to me.

I assumed that all core files were already being compiled with Py_BUILD_CORE 
(they certainly are for Windows), so this seems to be an oversight for 
timemodule.c.

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Ned Deily]

Ned Deily added the comment:

I think you have a Python installed in /usr/local that is interfering.

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[issue24301] gzip module failing to decompress valid compressed file

[Eric Gorr]

New submission from Eric Gorr:

I have a file whose first four bytes are 1F 8B 08 00 and if I use gunzip from 
the command line, it outputs:

gzip: zImage_extracted.gz: decompression OK, trailing garbage ignored

and correctly decompresses the file. However, if I use the gzip module to read 
and decompress the data, I get the following exception thrown:

  File /usr/lib/python3.4/gzip.py, line 360, in read
while self._read(readsize):
  File /usr/lib/python3.4/gzip.py, line 433, in _read
if not self._read_gzip_header():
  File /usr/lib/python3.4/gzip.py, line 297, in _read_gzip_header
raise OSError('Not a gzipped file')

I believe the problem I am facing is the same one described here in this SO 
question and answer:

http://stackoverflow.com/questions/4928560/how-can-i-work-with-gzip-files-which-contain-extra-data


This would appear to be serious bug in the gzip module that needs to be fixed.

--
components: Extension Modules
messages: 244188
nosy: Eric Gorr
priority: normal
severity: normal
status: open
title: gzip module failing to decompress valid compressed file
type: crash
versions: Python 3.4

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Yury Selivanov]

Yury Selivanov added the comment:

 Wild guess: perhaps you did a ./configure or the Makefile did an implicit 
 call to configure recently and/or you did a make install (to /usr/local) 
 before?

I don't have 'python' in /usr/local and /usr/local/bin

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Ned Deily]

Ned Deily added the comment:

But do you have any Python header files in /usr/local/include?  The gcc command 
you pasted shows -I/usr/local/include?  Mine don't show that.

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Yury Selivanov]

Yury Selivanov added the comment:

yury@ysmac ~/dev/py/cpython (HG: default?) $ ls /usr/local/include/
librtmp osxfuse pycairo

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Yury Selivanov]

Yury Selivanov added the comment:

FWIW, I think that in order to use _Py_BEGIN_SUPPRESS_IPH timemodule.c should 
be compiled with PY_CORE_CFLAGS, and that should be reflected in the Makefile.

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Ned Deily]

Ned Deily added the comment:

Yury, I'm not seeing that compile error with current head of default on OS X. 
Try a clean build, perhaps?

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Re: SyntaxError on progress module

[Cecil Westerhof]

Op Wednesday 27 May 2015 16:51 CEST schreef Mark Lawrence:

 On 27/05/2015 15:11, Cecil Westerhof wrote:
 Op Wednesday 27 May 2015 15:44 CEST schreef Mark Lawrence:

 On 27/05/2015 09:42, Cecil Westerhof wrote:
 Op Wednesday 27 May 2015 09:30 CEST schreef alb:

 But here I have another question, as a python novice is there
 really any reason for me to use any particular version of
 Python?

 Should I start directly with the newest? What about 2.7?

 In principal you should use the ‘latest’ 3. The only problem is
 that a lot of libraries are not converted to 3 yet. If you need
 one of those, then you have ‘no choice’ and have to use 2.7. But
 I would recommend to use ‘from __future__' to make the 2.7 code
 as much as possible 3 compliant.


 Please define a lot whilst bearing in mind green against red
 here https://python3wos.appspot.com/

 I just started using Python again and the first ‘real’ program I
 wrote I had to write with Python 2 because the needed library
 (libturpial, that is not listed on your link) works only with
 Python 2. A short search about which of the two to use gives
 similar answers to mine. And as far as I can see in my
 neighbourhood Python 2 is almost exclusively used because used
 libraries are only available in Python 2.

 This is not a scientifically substantiated argument, but for me
 good enough to use a lot.


 Have you actaully tried running libturpial with Python 3 or have you
 simply taken somebody or something's word for it? I've taken code in
 the past that was only Python 2, run it thought the 2to3 fixer and
 job done. Perhaps you could do the same. Perhaps you've already
 tried. Again, you're the only person who actually knows.

Of-course I tried: that is why I used “had to”. The library itself and
libraries it depends on are only existing in a 2 version (at the
moment). I write code that should work in 2 and 3 both as long as 2 is
still a significant part. I call programs with python3 (even while it
is 10 to 20 percent slower) and only when that is not possible I use
Python 2. (Except to test if code also works with Python 2.)

-- 
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Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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[issue24300] Code Refactoring in function nis_mapname()

[pankaj.s01]

New submission from pankaj.s01:

Hi,
Here , A code refactoring patch have been submitted for 
Function: nis_mapname() and 
File: Python-3.4.3/Modules/nismodule.c

Please Review it,

Thanks,
Pankaj

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keywords: patch
messages: 244183
nosy: pankaj.s01
priority: normal
severity: normal
status: open
title: Code Refactoring  in function nis_mapname()
type: enhancement
versions: Python 3.4
Added file: http://bugs.python.org/file39521/Python-3.4.3-nismodule.patch

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[issue24298] inspect.signature includes bound argument for wrappers around bound methods

[Petr Viktorin]

Petr Viktorin added the comment:

Reported by David Gibson here: 
https://bugzilla.redhat.com/show_bug.cgi?id=1201990

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[issue24298] inspect.signature includes bound argument for wrappers around bound methods

[Petr Viktorin]

New submission from Petr Viktorin:

When obtaining the signature of a bound method, inspect.signature, by default, 
omits the self argument to the method, since it is already specified in the 
bound method.  However, if you create a wrapper around a bound method with 
functools.update_wrapper() or @functools.wraps, calling inspect.signature on 
the wrapper will return a signature which includes the self argument.

Reproducer:

import inspect
import functools

class Foo(object):
def bar(self, testarg):
pass

f = Foo()

@functools.wraps(f.bar)
def baz(*args):
f.bar(*args)


assert inspect.signature(baz) == inspect.signature(f.bar)

The program will fail with an assertion error. Examining inspect.signature(baz) 
shows:

 print(inspect.signature(baz))
(self, testarg)
 print(inspect.signature(f.bar))
(testarg)

Looking at the code in inspect.py:

The handling of bound methods appears at the top of 
inspect._signature_internal().  Since baz is not itself a bound method, it 
doesn't trigger this case.  Instead inspect.unwrap is called, returning f.bar.

inspect._signature_is_functionlike(f.bar) returns True, causing 
Signature.from_function to be called.  Unlike the direct bound method case, 
this includes the bound method's self argument.

--
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priority: normal
severity: normal
status: open
title: inspect.signature includes bound argument for wrappers around bound 
methods
versions: Python 3.4, Python 3.5

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[issue24299] 2.7.10 test__locale.py change breaks on Solaris

[John Beck]

New submission from John Beck:

The upgrade from 2.7.9 to 2.7.10 resulted in test__locale failing.
This test had previously succeeded.  The difference is that the
thousands-separator for the fr_FR locale in known_numerics was
changed from '' (i.e., unknown) to ' ' (i.e. space).  But on Solaris,
'\xa0' (i.e., non-break space in ISO8859-1) is what the fr_FR locale
returns for LC_NUMERIC's thousands-separator.  I inquired with our
Globalization experts, who replied:

---
The short answer is that CLDR defines the group separator as no-break 
space (U+00A0): http://st.unicode.org/cldr-apps/v#/fr/Symbols/
so the solaris locale fr_FR (=fr_FR.ISO8859-1) is correct.

The long answer is that the situation is confusing, the fr_FR.ISO8859-1
defines the thousands_sep as no-break space, but fr_FR.UTF-8 defines
the thousands_sep as space (U+0020). There is no technical limit, but
combination of POSIX [1] and C language [2] limits the thousands_sep
to single byte character. The no-break space is single byte character
in ISO8859-1, but multibyte in UTF-8.

[1] 
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html#tag_07_03_04

[2] http://en.cppreference.com/w/c/locale/lconv

http://en.cppreference.com/w/c/language/character_constant
---
The attached patch fixes the test on Solaris.  It is not clear if this
is the Right Answer for all platforms, but I offer the attached patch
in case it helps anyone else.

--
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files: 25-test__locale.patch
keywords: patch
messages: 244181
nosy: jbeck
priority: normal
severity: normal
status: open
title: 2.7.10 test__locale.py change breaks on Solaris
type: behavior
versions: Python 2.7
Added file: http://bugs.python.org/file39520/25-test__locale.patch

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Yury Selivanov]

Yury Selivanov added the comment:

This exact sequence of commands

$ make clean
$ ./configure
$ make -j8

does not build.

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Yury Selivanov]

Yury Selivanov added the comment:

$ hg status
shows nothing, branch is default (but 3.5 doesn't get built either) etc.

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Ned Deily]

Ned Deily added the comment:

Wild guess: perhaps you did a ./configure or the Makefile did an implicit call 
to configure recently and/or you did a make install (to /usr/local) before?

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[issue24297] Lib/symbol.py is out of sync with Grammar/Grammar

[Roundup Robot]

Roundup Robot added the comment:

New changeset 843fe7e831a8 by Yury Selivanov in branch '3.5':
Issue 24297: Update symbol.py. See also issue 24017.
https://hg.python.org/cpython/rev/843fe7e831a8

New changeset 87509d71653b by Yury Selivanov in branch 'default':
Issue 24297: Update symbol.py. See also issue 24017.
https://hg.python.org/cpython/rev/87509d71653b

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[issue24017] Implemenation of the PEP 492 - Coroutines with async and await syntax

[Roundup Robot]

Roundup Robot added the comment:

New changeset 843fe7e831a8 by Yury Selivanov in branch '3.5':
Issue 24297: Update symbol.py. See also issue 24017.
https://hg.python.org/cpython/rev/843fe7e831a8

New changeset 87509d71653b by Yury Selivanov in branch 'default':
Issue 24297: Update symbol.py. See also issue 24017.
https://hg.python.org/cpython/rev/87509d71653b

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[issue24297] Lib/symbol.py is out of sync with Grammar/Grammar

[Yury Selivanov]

Yury Selivanov added the comment:

Attached is a new unittest to make sure that symbol.py is always updated.  
Essentially it's the same test that we have for keywords.py.  Please review.

--
assignee:  - yselivanov
keywords: +patch
nosy: +yselivanov
stage:  - patch review
versions: +Python 3.6
Added file: http://bugs.python.org/file39519/test_symbol.patch

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[issue24288] Include/opcode.h is modified during building

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

I think the intension was to produce aligned data, but the alignment of the 
second column was wrong. Here is a patch that corrects formatting.

--
stage: needs patch - patch review
Added file: http://bugs.python.org/file39517/generate_opcode_h_align.patch

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Re: SyntaxError on progress module

[Cecil Westerhof]

Op Wednesday 27 May 2015 15:44 CEST schreef Mark Lawrence:

 On 27/05/2015 09:42, Cecil Westerhof wrote:
 Op Wednesday 27 May 2015 09:30 CEST schreef alb:

 But here I have another question, as a python novice is there
 really any reason for me to use any particular version of Python?

 Should I start directly with the newest? What about 2.7?

 In principal you should use the ‘latest’ 3. The only problem is
 that a lot of libraries are not converted to 3 yet. If you need one
 of those, then you have ‘no choice’ and have to use 2.7. But I
 would recommend to use ‘from __future__' to make the 2.7 code as
 much as possible 3 compliant.


 Please define a lot whilst bearing in mind green against red here
 https://python3wos.appspot.com/

I just started using Python again and the first ‘real’ program I wrote
I had to write with Python 2 because the needed library (libturpial,
that is not listed on your link) works only with Python 2. A short
search about which of the two to use gives similar answers to mine.
And as far as I can see in my neighbourhood Python 2 is almost
exclusively used because used libraries are only available in Python
2.

This is not a scientifically substantiated argument, but for me good
enough to use a lot.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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[issue24297] Lib/symbol.py is out of sync with Grammar/Grammar

[Brett Cannon]

Changes by Brett Cannon br...@python.org:


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[issue24296] Queue documentation note needed

[Raymond Hettinger]

Changes by Raymond Hettinger raymond.hettin...@gmail.com:


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nosy: +rhettinger

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Re: should self be changed?

[Grant Edwards]

On 2015-05-27, Todd toddr...@gmail.com wrote:
 On Wed, May 27, 2015 at 2:40 PM, zipher dreamingforw...@gmail.com wrote:

 [some stupid crap]

 If your goal is to get people to stop calling you a troll, you are
 going about it the wrong way.  If it isn't, why are you even here?
 Please remember the first rule of holes: if you find yourself in a
 hole, stop digging.

And thanks to everybody who keeps replying to zipher's posts so that
those of use who's newsreaders are configured to filter him out get to
see them anyway.

-- 
Grant Edwards   grant.b.edwardsYow! I need to discuss
  at   BUY-BACK PROVISIONS
  gmail.comwith at least six studio
   SLEAZEBALLS!!
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Re: SyntaxError on progress module

[Mark Lawrence]

On 27/05/2015 15:11, Cecil Westerhof wrote:

Op Wednesday 27 May 2015 15:44 CEST schreef Mark Lawrence:


On 27/05/2015 09:42, Cecil Westerhof wrote:

Op Wednesday 27 May 2015 09:30 CEST schreef alb:


But here I have another question, as a python novice is there
really any reason for me to use any particular version of Python?

Should I start directly with the newest? What about 2.7?


In principal you should use the ‘latest’ 3. The only problem is
that a lot of libraries are not converted to 3 yet. If you need one
of those, then you have ‘no choice’ and have to use 2.7. But I
would recommend to use ‘from __future__' to make the 2.7 code as
much as possible 3 compliant.



Please define a lot whilst bearing in mind green against red here
https://python3wos.appspot.com/


I just started using Python again and the first ‘real’ program I wrote
I had to write with Python 2 because the needed library (libturpial,
that is not listed on your link) works only with Python 2. A short
search about which of the two to use gives similar answers to mine.
And as far as I can see in my neighbourhood Python 2 is almost
exclusively used because used libraries are only available in Python
2.

This is not a scientifically substantiated argument, but for me good
enough to use a lot.



Have you actaully tried running libturpial with Python 3 or have you 
simply taken somebody or something's word for it?  I've taken code in 
the past that was only Python 2, run it thought the 2to3 fixer and job 
done.  Perhaps you could do the same.  Perhaps you've already tried. 
Again, you're the only person who actually knows.


--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence

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[issue24296] Queue documentation note needed

[Raymond Hettinger]

Raymond Hettinger added the comment:

It is normal for daemon threads to not be shut down.   That is why they exist.  
The purpose of Queue.join() is to give other threads a way to know when daemons 
have finished doing their work (i.e. a print manager thread to indicate that it 
is done printing).  If the worker threads were actually going to terminate, you 
wouldn't need Queue.join(), you would use a Thread.join().

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[issue24288] Include/opcode.h is modified during building

[Yury Selivanov]

Yury Selivanov added the comment:

lgtm

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Yury Selivanov]

Yury Selivanov added the comment:

timemodule.c no longer compiles on MacOSX:


gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv 
-O3 -Wall -Wstrict-prototypes -Werror=declaration-after-statement -I./Include 
-I. -IInclude -I/usr/local/include -I/Users/yury/dev/py/cpython/Include 
-I/Users/yury/dev/py/cpython -c /Users/yury/dev/py/cpython/Modules/timemodule.c 
-o 
build/temp.macosx-10.10-x86_64-3.5/Users/yury/dev/py/cpython/Modules/timemodule.o
/Users/yury/dev/py/cpython/Modules/timemodule.c:656:9: error: use of undeclared 
identifier '_Py_BEGIN_SUPPRESS_IPH'
_Py_BEGIN_SUPPRESS_IPH
^
/Users/yury/dev/py/cpython/Modules/timemodule.c:658:9: error: use of undeclared 
identifier '_Py_END_SUPPRESS_IPH'
_Py_END_SUPPRESS_IPH
^
2 errors generated.

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nosy: +yselivanov
priority: normal - critical

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[issue24270] PEP 485 (math.isclose) implementation

[Tal Einat]

Tal Einat added the comment:

Attached yet another revised version of the math.isclose() patch.

This patch fixes a problem with the tests in the previous patch which causes 
them to fail when the full test suite is run.

I've also slightly reworded the doc-string.

Hopefully this is ready to go in!

--
Added file: http://bugs.python.org/file39518/math_isclose_v4.patch

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Steve Dower]

Steve Dower added the comment:

That change was in for beta 1, so we would have noticed if we didn't get Mac 
builds.

Something else has changed, probably some headers.

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[issue24302] Dead Code of Handler check in function faulthandler_fatal_error()

[pankaj.s01]

New submission from pankaj.s01:

Hi,
There is dead code reported in this issue and I think no need to check for NULL 
of 'handler' in function faulthandler_fatal_error() and file 
Python-3.4.3/Modules/faulthandler.c . where 'handler' is pointed to staic array 
faulthandler_handlers[] which never will be null inside loop with 
faulthandler_nsignals value and doesn't means to check for NULL outside of 
loop. but if there is possibility of 'handler' to be NULL then it should be 
check inside the loop until
handler-signum is not equal to signum and then break;

--
components: Extension Modules
files: Python-3.4.3-faulthandler.patch
keywords: patch
messages: 244195
nosy: pankaj.s01
priority: normal
severity: normal
status: open
title: Dead Code of Handler check in function faulthandler_fatal_error()
type: enhancement
versions: Python 3.4
Added file: http://bugs.python.org/file39522/Python-3.4.3-faulthandler.patch

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[issue24298] inspect.signature includes bound argument for wrappers around bound methods

[Yury Selivanov]

Changes by Yury Selivanov yseliva...@gmail.com:


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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Yury Selivanov]

Yury Selivanov added the comment:

 Towards the end of the configured top-level Makefile, you should see:

Yes, I don't see that line.  What should I do to regenerate it?  And another 
question: what did go wrong with my checkout?

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Majeed Arni]

Majeed Arni added the comment:

Though %f is a valid format from Python's doc 
https://docs.python.org/2/library/datetime.html, the fix just ignores it on 
Windows? can we atleast get milliseconds on Windows and Micro on Linux?

%f  Microsecond as a decimal number, zero-padded on the left.   00, 
01, ..., 99 (4)

%f is an extension to the set of format characters in the C standard (but 
implemented separately in datetime objects, and therefore always available). 
When used with the strptime() method, the %f directive accepts from one to six 
digits and zero pads on the right.

New in version 2.6.

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[issue23359] Speed-up set_lookkey()

[Raymond Hettinger]

Changes by Raymond Hettinger raymond.hettin...@gmail.com:


--
resolution:  - fixed
status: open - closed

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[issue23359] Speed-up set_lookkey()

[Roundup Robot]

Roundup Robot added the comment:

New changeset cd1e1715becd by Raymond Hettinger in branch 'default':
Issue #23359: Specialize set_lookkey intoa lookup function and an insert 
function.
https://hg.python.org/cpython/rev/cd1e1715becd

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[issue23275] Can assign [] = (), but not () = []

[Raymond Hettinger]

Raymond Hettinger added the comment:

Berker's patch looks good.
It has several virtues:

* the error message is reasonable and clear
* it makes the language more consistent
* it doesn't break any existing code.
* it makes the AST a little simpler and faster
  by removing a special case

The patch needs to updated:
* remove the whatsnew entry
* fix test_codeop which expects del () to raise SyntaxError
* fix test_syntax which fails on () = 1 and del ()
* fix test_with which fails on with mock as ()

--
assignee:  - rhettinger
versions: +Python 3.6 -Python 3.5

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[Ned Deily]

Ned Deily added the comment:

Yury, another (less) wild guess: do you have an out-of-date Modules/Setup or 
Setup.local?  timemodule is defined in Setup.dist but that will be overridden 
by a locally modified copy in the Modules directory.  Towards the end of the 
configured top-level Makefile, you should see:

# Rules appended by makedepend

[...]

Modules/timemodule.o: $(srcdir)/Modules/timemodule.c; $(CC) $(PY_CORE_CFLAGS)  
-c $(srcdir)/Modules/timemodule.c -o Modules/timemodule.o

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[issue24244] Python exception on strftime with %f on Python 3 and Python 2 on windows

[R. David Murray]

R. David Murray added the comment:

Note that when I run into build problems after an update, I generally run 'make 
distclean' and then redo the configure/make.  This generally cleans up any 
problems like this (and I don't find that I need to do it very often.)

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