[issue28731] _PyDict_NewPresized() creates too small dict

STINNER Victor added the comment: Even if the use case is limited (creation of small dictionaries), it's a nice enhancement, good job Naoki! It's nice to see someone looking at this very important Python type! 1.28x faster or 1.62x faster is significant for a micro-optimization! (My personal

[issue28734] argparse: successive parsing wipes out nargs=? values

New submission from Adam Stewart: I'm writing a wrapper that optionally accepts a file and reads more options from that file. The wrapper then needs to pass all of these options and the file to another program (qsub). Here is a minimal example to reproduce the behavior I'm seeing: >>> import

[issue28159] Deprecate isdst argument in email.utils.localtime

R. David Murray added the comment: At this point I think the deprecation warning will go into 3.7, but we should be able to remove it in 3.8. I think I'll probably keep the 'localtime' method and have it delegate it to astimezone, because frankly I would never be able to remember that that

[issue26936] android: test_socket fails

Xavier de Gaye added the comment: New patch using support.less_than_android_api(level). -- stage: patch review -> commit review Added file: http://bugs.python.org/file45534/test_socket_2.patch ___ Python tracker

[issue28694] tkinter interface to fontchooser

Lance Ware added the comment: Not having any luck creating a patch. I have retrieved source, built python, put my fontchooser.py file (attached) in cpython\Lib\tkinter, done hg add and hg commit, but when I try to do hg diff it gives me nothing. -- Added file:

[issue28731] _PyDict_NewPresized() creates too small dict

Serhiy Storchaka added the comment: > So how about more small, maximum presize? I don't know what is the benefit of this, but this change looks correct. The benefit of preresizing is vanishingly small for very large dicts. -- ___ Python tracker

[issue28731] _PyDict_NewPresized() creates too small dict

STINNER Victor added the comment: > Can I assume PY_SSIZE_T_MAX is 2**n-1? I think so. Add an assertion just to be sure :-) -- ___ Python tracker ___

[issue28730] __reduce__ not being called in dervied extension class from datetime.datetime

Alexander Belopolsky added the comment: > On Nov 18, 2016, at 8:49 AM, Serhiy Storchaka wrote: > > But there are two drawbacks. It is not too late to make improvements. If you have specific proposals - please bring them up on the mailing list. --

[issue28731] _PyDict_NewPresized() creates too small dict

Serhiy Storchaka added the comment: This optimization affects only 6-element (and perhaps to less extend 11-element) dicts. But in any case this is good enhancement. Naoki, could you please make microbenchmarks for 5- and 7-element dicts with your next patch? --

need help to get my python image to move around using tkinter

Hi I am new here and to python, I am currently studying towards my degree in computer science and have to build a program but I have hit a brick wall. I am trying to make an image move around the canvas. I can make a rectangle move using the following: #test rectangle

ANN: eGenix PyRun - One file Python Runtime 2.2.2

ANNOUNCING eGenix PyRun - One file Python Runtime Version 2.2.2 An easy-to-use single file relocatable Python run-time - available for Linux, Mac OS X and Unix

[issue28735] Mock is equal to ANY but MagicMock is not

New submission from Rafael Jacinto Caricio da Fonseca: On Python 3.5.2 mock.Mock() is equal to mock.ANY, but mock.MagicMock() is not. Minimal example: In Python 3.5.2: >>> from unittest import mock >>> mock.Mock() == mock.ANY True >>> mock.ANY == mock.Mock() True >>> mock.MagicMock() ==

[issue28596] on Android _bootlocale on startup relies on too many library modules

Chi Hsuan Yen added the comment: Here's my try: force UTF-8 on Android as explained in msg281110. sys.getfilesystemencoding() is already UTF-8 since issue22747. Testing: 1. Starting up time 0.18~0.19s => 0.11~0.12s, on Android 6.0, ASUS ZE500KL (Qualcomm MSM8916 QuadCore 1.2GHz) 2. test_site

[issue26928] _bootlocale imports locale at startup on Android, causing test_site to fail

Chi Hsuan Yen added the comment: Submitted a patch to issue28596 -- ___ Python tracker ___ ___

[issue28731] _PyDict_NewPresized() creates too small dict

INADA Naoki added the comment: Can I assume PY_SSIZE_T_MAX is 2**n-1? If so, I can define like: #define PyDict_MAXSIZE (PY_SSIZE_T/8+1) -- ___ Python tracker

[issue28159] Deprecate isdst argument in email.utils.localtime

Mariatta Wijaya added the comment: Thanks David :) So, I found that isdst was never added as method signature in the docs, but it is mentioned in the paragraph. https://docs.python.org/3.7/library/email.util.html?#email.utils.localtime The intention is still just to deprecate isdst argument,

[issue28531] Improve utf7 encoder memory usage

STINNER Victor added the comment: Serhiy Storchaka: "The performance of the UTF-7 codec is not important." Right. "Actually I'm going to propose replacing it with Python implementation." Oh. Sadly, PyUnicode_DecodeUTF7() is part of the stable ABI. Do you want to call the Python codec from

[issue28731] _PyDict_NewPresized() creates too small dict

INADA Naoki added the comment: On Fri, Nov 18, 2016 at 9:31 PM, Serhiy Storchaka wrote: > > Serhiy Storchaka added the comment: > > The condition in the loop in _PyDict_NewPresized() contains the test newsize > > 0. This is a check for integer overflow. But it doesn't

[issue28730] __reduce__ not being called in dervied extension class from datetime.datetime

Serhiy Storchaka added the comment: Thank you for your explanation Alexander. It looks reasonable. But there are two drawbacks. 1. By default the fold bit is ignored. That means that you lost it when use multiprocessing or other library that uses default pickle protocol. 2. It is not easy to

[issue28398] Return singleton empty string in _PyUnicode_FromASCII

STINNER Victor added the comment: To reduce the memory footprint, it's important that we reuse internal Unicode singletons. For the empty string singleton, you have two choices: * if length is equal to zero, return the singleton * create a string and then call unicode_result()

[issue28739] PEP 498: docstrings as f-strings

Eric V. Smith added the comment: As you've seen, the answer is "no"! We'd need to add logic to evaluate them at function definition time. That would be a slight noticeable change, if the expressions had side effects. -- ___ Python tracker

[issue28735] Mock is equal to ANY but MagicMock is not

Changes by SilentGhost : -- nosy: +michael.foord versions: +Python 3.6, Python 3.7 ___ Python tracker ___

[issue28740] Add sys.getandroidapilevel()

New submission from STINNER Victor: Android slowly becomes a first-citizen class platform in CPython thanks to Xavier de Gaye and other motivated developers, thanks to all of them :-) To fix the issue #28596, we need a function to check if we are running Android. Chi Hsuan Yen proposed to use

[issue28739] PEP 498: docstrings as f-strings

Yury Selivanov added the comment: > IMO it would be simpler do disallow all f-strings as docstrings. How exactly you want to disallow them? Raise SyntaxError? If you don't raise anything, then the behaviour is just confusing -- the interpreter parses them, but __doc__ is None. I think this

[issue28739] PEP 498: docstrings as f-strings

Martin Panter added the comment: Having an unassigned f-string as the first statement is still valid syntax, so could at most be a warning, not a SyntaxError. -- ___ Python tracker

[issue28687] Python 2.7.12 windows x64 installer fails after previous bad uninstall

Steve Dower added the comment: > ...is to Repair first and then reinstall Repair and then *un*install (obviously). -- ___ Python tracker ___

[issue28739] PEP 498: docstrings as f-strings

Martin Panter added the comment: There was a bit of discussion at the top of . IMO it would be simpler do disallow all f-strings as docstrings. Otherwise, what would the result of this be: name = "module level" class C: name = "class level"

[issue28739] PEP 498: docstrings as f-strings

Martin Panter added the comment: Actually, testing your code fragment, it seems you do get a doc string when the f-string has no substitutions in curly brackets, otherwise you don’t get any doc string. Maybe this is due to how different forms of string are compiled. >>> class Foo: ...

[issue28687] Python 2.7.12 windows x64 installer fails after previous bad uninstall

Steve Dower added the comment: So the fix for pre-2.7.13 here is to Repair first and then reinstall. But we've actually fixed this for 2.7.13 by making the pip uninstall step non-vital (the work was sponsored by Microsoft because it affects the Visual Studio installer). See issue27888 for

[issue28710] Sphinx incompatible markup in configparser.ConfigParser.

R. David Murray added the comment: I think that we do not generally use ReST markup in our docstrings. So replacing `x' with 'x' would be more correct, I think. In many cases the quotes could just be omitted entirely. The patch command says: patch unexpectedly ends in middle of line

[issue28740] Add sys.getandroidapilevel()

STINNER Victor added the comment: Ah, I wrote a patch to implement the function. I used ANDROID_API_LEVEL from pyconfig.h. I chose to simply return an integer. I don't know if it's the most future-proof API :-) -- keywords: +patch Added file:

[issue28741] PEP 498: single '}' is not allowed

New submission from Yury Selivanov: The PEP should document the "single '}' is not allowed" error. -- assignee: docs@python components: Documentation messages: 281173 nosy: docs@python, eric.smith, yselivanov priority: normal severity: normal status: open title: PEP 498: single '}' is

[issue28729] Exception from sqlite3 adapter masked by sqlite3.InterfaceError

Julien Palard added the comment: By moving: ``` /* else set the right exception and return NULL */ PyErr_SetString(pysqlite_ProgrammingError, "can't adapt"); ``` from `pysqlite_microprotocols_adapt` to `pysqlite_adapt` (to avoid changing the semantics from the outside) make the

[issue28739] PEP 498: docstrings as f-strings

New submission from Yury Selivanov: Can f-strings be used as docstrings? Right now: class Foo: f'spam' Foo.__doc__ is None I couldn't find that f-strings cannot be used as docstrings in neither PEP 498 not in the 3.6 documentation, so I suppose this is a bug. --

[issue28596] on Android _bootlocale on startup relies on too many library modules

STINNER Victor added the comment: I created the issue #28740: Add sys.getandroidapilevel(). -- ___ Python tracker ___

Re: need help to get my python image to move around using tkinter

thankyou so much, that is the exact help I required to put me in the right direction :D -- https://mail.python.org/mailman/listinfo/python-list

[issue25731] Assigning and deleting __new__ attr on the class does not allow to create instances of this class

Changes by Carl Dunham : -- nosy: +Carl Dunham ___ Python tracker ___ ___ Python-bugs-list

[issue28159] Deprecate isdst argument in email.utils.localtime

R. David Murray added the comment: No, localtime does something subtly different, in that it will accept a naive datetime add the local timezone to it. Calling localtime() is also more convenient/readable than calling datetime.now().astimezone(). --

[issue28737] Document that tp_dealloc handler must call PyObject_GC_UnTrack if Py_TPFLAGS_HAVE_GC is set

New submission from Sam Gross: In general, an a PyTypeObject that has Py_TPFLAGS_HAVE_GC set must call PyObject_GC_UnTrack() before it frees any PyObject* references it owns. The only reference to this requirement I found is in

[issue28734] argparse: successive parsing wipes out nargs=? values

Adam Stewart added the comment: Works for me, thanks Wolfgang! -- resolution: -> not a bug status: open -> closed ___ Python tracker ___

[issue28398] Return singleton empty string in _PyUnicode_FromASCII

Serhiy Storchaka added the comment: I know that _PyUnicode_FromASCII() is called with size=0. But most callers call it only with size!=0. I didn't investigate further. We should know what is the benefit of the patch before committing it. Just "for consistency" is a weak argument itself.

[issue28531] Improve utf7 encoder memory usage

Serhiy Storchaka added the comment: I fixed many long living bugs in the UTF-7 codec in the past, and I remember that we fixed bugs introduced by using _PyUnicodeWriter or _PyBytesWriter many months after changing the code. Since the UTF-7 codec is rarely used, there is a risk of introducing

[issue28694] tkinter interface to fontchooser

Zachary Ware added the comment: I would recommend backing out your commit (hg rollback if you haven't pulled or otherwise changed your checkout since you made your commit), and just do 'hg diff' at the point where you would commit. In this particular case, if there are no changes other than

[issue28736] multiprocessing.Lock() no longer has .acquire()

R. David Murray added the comment: What gives you the idea that the multiprocessing Lock implementation has been changed? Are you confusing the asyncio Lock with the threading Lock? Is there a documentation crosslink somewhere that is going to the wrong place? -- nosy:

[issue28596] on Android _bootlocale on startup relies on too many library modules

Changes by Antoine Pitrou : -- nosy: -pitrou ___ Python tracker ___ ___ Python-bugs-list

[issue28734] argparse: successive parsing wipes out nargs=? values

Wolfgang Maier added the comment: try this: parser.add_argument('file', nargs='?', default = argparse.SUPPRESS) I don't think this is a bug. The default for the default parameter is None so the behavior is consistent with the documentation. -- nosy: +wolma

[issue28728] test_host_resolution in test_socket fails

SilentGhost added the comment: Of course, you're right, that was my mistake. The last three addresses fail to raise, namely: '::1q', '::1::2' and '1:1:1:1:1:1:1:1:1'. -- stage: patch review -> title: test_host_resolution in test_socket fails on duplicate assert ->

[issue28728] test_host_resolution in test_socket fails on duplicate assert

Changes by SilentGhost : Removed file: http://bugs.python.org/file45524/test_socket.diff ___ Python tracker ___

[issue28731] _PyDict_NewPresized() creates too small dict

INADA Naoki added the comment: > This optimization affects only 6-element (and perhaps to less extend > 11-element) dicts. But in any case this is good enhancement. This affects when minused = (n*2/3)+1 .. n-1 (n=8, 16, ...) n=8: 6, 7 n=16: 11, 12, ..15 > Naoki, could you please make

[issue28531] Improve utf7 encoder memory usage

STINNER Victor added the comment: > I remember that we fixed bugs introduced by using _PyUnicodeWriter or > _PyBytesWriter many months after changing the code. Yeah, now I recall it (vaguely), that's why I closed the bug :-) -- ___ Python tracker

[issue28596] on Android _bootlocale on startup relies on too many library modules

Chi Hsuan Yen added the comment: Version 2 - use sys.implementation._multiarch to determine whether it's Android or not -- Added file: http://bugs.python.org/file45537/android-locale-utf8.patch ___ Python tracker

Re: ANN: eGenix PyRun - One file Python Runtime 2.2.2

On 2016-11-18, eGenix Team: M.-A. Lemburg wrote: > eGenix PyRun is our open source, one file, no installation version of > Python, making the distribution of a Python interpreter to run based > scripts and applications What's a "based" script? -- Grant Edwards

[issue28736] multiprocessing.Lock() no longer has .acquire()

New submission from Eric Leadbetter: The documentation on the multiprocessing library in Python 3 uses Lock.acquire()/Lock.release() in the example for primitive synchronization (https://docs.python.org/3/library/multiprocessing.html#synchronization-between-processes). Lock() has been changed

[issue28531] Improve utf7 encoder memory usage

STINNER Victor added the comment: Oh no, now I'm afraid of breaking something :-D I don't trust anymore our test suite for the UTF-7 codec, so I close the issue :-) Sorry Xiang, but as we said, this rarely used codec is not important enough to require optimization. -- resolution: ->

[issue28398] Return singleton empty string in _PyUnicode_FromASCII

Serhiy Storchaka added the comment: My question is simple: in what circumstances the patch has an effect? -- ___ Python tracker ___

Re: Encountering fatal error x80070643 while installing Python

On 2016-11-18 11:40, Irene Venditti wrote: Hi everybody, I've got a problem with the installation of Python. I am a translator and currently I'm translating a book on programming Minecraft with Python, from English to Dutch. My computer is a Windows 10 computer, 64-bits (Toshiba Qosmio all in

[issue28677] difficult to parse sentence structure in "When an instance attribute is referenced that isn't a data attribute"

Terry J. Reedy added the comment: David's wording looks good. -- nosy: +terry.reedy ___ Python tracker ___

[issue28398] Return singleton empty string in _PyUnicode_FromASCII

STINNER Victor added the comment: > We should know what is the benefit of the patch before committing it. The purpose of the patch is to use the empty string singleton to reduce the memory footprint, instead of creating multiple empty (Unicode) string objects. --

Re: Style().configure don't works for all widgets

Luis Marzulli wrote: > ttk.Style().configure(".", font=('Courier New', 30, "bold")) > > works for Button and Label widgets (and maybe others) and don't works for > Entry widget? > > Example in Python 3: > from tkinter import * > from tkinter import ttk > from tkinter import font > > root =

[issue28398] Return singleton empty string in _PyUnicode_FromASCII

Xiang Zhang added the comment: > My question is simple: in what circumstances the patch has an effect? My original intention is that there is no need for the caller to check for the empty string. Even there is no use case now, it could be in future. But Serhiy, I am actually very glad to get

[issue28673] pyro4 with more than 15 threads often crashes 2.7.12

Changes by Terry J. Reedy : -- stage: -> test needed title: When using pyro4 with more than 15 threads, python 2.7.12 cores frequently -> pyro4 with more than 15 threads often crashes 2.7.12 ___ Python tracker

Re: Parsing a single-level JSON file

the end result file looks like this cat fields.json {"myField1": {"id": "customfield_10600"}, "myField2": {"id": "customfield_11334"}, "myField3": {"id": "customfield_993434"}, etc etc -- https://mail.python.org/mailman/listinfo/python-list

[issue28710] Sphinx incompatible markup in configparser.ConfigParser.

Terry J. Reedy added the comment: As far as I looked, the patch changes `xyz' in docstrings and quotes to ``xyz``. A rst expert should verify that this is correct. In printed strings, `zyz' is changed to 'xyz', which I consider to be correct. Before applying this, I would want to review in

Re: Parsing a single-level JSON file

In mike.rei...@gmail.com writes: > Im reading in a JSON file that looks like this > ... snip ... > Lets say I want to get the ID # of MyField1, how can I parse this with > json lib? Theyre all on the same level, not sure how to target it to

Re: Parsing a single-level JSON file

In John Gordon writes: > In > mike.rei...@gmail.com writes: > with open("json.dat", "r") as fp: > data = json.load(fp) > for item in data: > if

[issue28736] multiprocessing.Lock() no longer has .acquire()

Eric Leadbetter added the comment: It was a typographical error on my part. My mistake. -- status: open -> closed ___ Python tracker ___

[issue28687] Python 2.7.12 windows x64 installer fails after previous bad uninstall

Terry J. Reedy added the comment: I had something like this happen with early 3.y.z. I believe I re-downloaded and re-installed the old version before either uninstalling or upgrading. I now keep the installer for x.y.z around until it is deleted or replaced. (I don't now if this is still

[issue24452] Make webbrowser support Chrome on Mac OS X

Roundup Robot added the comment: New changeset 0c8270cbdc62 by Brett Cannon in branch 'default': Issue #24452: add attribution https://hg.python.org/cpython/rev/0c8270cbdc62 -- ___ Python tracker

[issue28681] About function renaming in the tutorial

Terry J. Reedy added the comment: It took me a moment to realize that 'value of the function name' meant 'the function object associated with the name'. I think David's rewrite is a substantial improvement. I would just change the end 'can be used as a function' to 'can be used to access

Re: Parsing a single-level JSON file

mike.rei...@gmail.com wrote: > hi all, > > Im reading in a JSON file that looks like this > > > [ >{ > "name":"myField1", > "searchable":true, > "navigable":true, > "custom":true, > "clauseNames":[ > "cf[10190]", > "Log Details" >

Re: Parsing a single-level JSON file

On 2016-11-18 18:23, mike.rei...@gmail.com wrote: hi all, Im reading in a JSON file that looks like this [ { "name":"myField1", "searchable":true, "navigable":true, "custom":true, "clauseNames":[ "cf[10190]", "Log Details" ],

Re: need help to get my python image to move around using tkinter

twgrops--- via Python-list wrote: > Hi I am new here and to python, > > I am currently studying towards my degree in computer science and have to > build a program but I have hit a brick wall. I am trying to make an image > move around the canvas. I can make a rectangle move using the following:

Parsing a single-level JSON file

hi all, Im reading in a JSON file that looks like this [ { "name":"myField1", "searchable":true, "navigable":true, "custom":true, "clauseNames":[ "cf[10190]", "Log Details" ], "orderable":true, "id":"customfield_10190",

[issue28705] Clean up design FAQ question about compiling to C

Roundup Robot added the comment: New changeset a0a3dab4ed66 by Brett Cannon in branch '3.6': Issue #28705: greatly simplify the FAQ entry on transpiling. https://hg.python.org/cpython/rev/a0a3dab4ed66 New changeset 89e2201142f9 by Brett Cannon in branch 'default': Merge for issue #28705

Re: Parsing a single-level JSON file

On Friday, November 18, 2016 at 1:23:18 PM UTC-5, mike@gmail.com wrote: > hi all, > > Im reading in a JSON file that looks like this > > > [ >{ > "name":"myField1", > "searchable":true, > "navigable":true, > "custom":true, > "clauseNames":[ >

[issue28738] Document SIGBREAK as argument for signal() under Windows.

New submission from Wojtek Ruszczewski: SIGBREAK should be listed as acceptable for signal.signal() under Windows. Some context. Registering a handler for SIGBREAK may be useful as this is the signal that generating CTRL_BREAK_EVENT results in (and the latter combined with the

[issue28159] Deprecate isdst argument in email.utils.localtime

Alexander Belopolsky added the comment: Keeping localtime as a convenience function in email.util is fine, but isdst argument should be eliminated at some point. There is a fundamental problem with disambiguating fold times with isdst: some folds do not involve the change in dst or happen in

[issue28705] Clean up design FAQ question about compiling to C

Changes by Brett Cannon : -- resolution: -> fixed stage: -> resolved status: open -> closed ___ Python tracker ___

[issue28693] No HKSCS support in Windows cp950

Changes by Terry J. Reedy : -- versions: -Python 3.3, Python 3.4 ___ Python tracker ___

[issue28736] multiprocessing.Lock() no longer has .acquire()

Changes by Zachary Ware : -- resolution: -> not a bug stage: -> resolved ___ Python tracker ___

[issue28702] Confusing error message when None used in expressions, eg. "'NoneType' object has no attribute 'foo'"

Terry J. Reedy added the comment: I have doubts also. The issue is the same for NotImplemented, though the occurrence is much rarer, and similar for Ellipsis. >>> NotImplemented.foo Traceback (most recent call last): File "", line 1, in NotImplemented.foo AttributeError:

[issue28688] Warning -- warnings.filters was modified by test_warnings

Martin Panter added the comment: Here is another way to remember that the filter list has already been initialized. I made a new immortal _warnings.filters_initialized flag at the C level. It is actually a list so that it can be mutated and remembered across module reloads, but it is either

[issue28688] Warning -- warnings.filters was modified by test_warnings

Changes by Martin Panter : Added file: http://bugs.python.org/file45542/immortal-filters.patch ___ Python tracker ___

[issue28744] Basic precision calc error

Zachary Ware added the comment: https://docs.python.org/3/tutorial/floatingpoint.html -- nosy: +zach.ware resolution: -> not a bug stage: -> resolved status: open -> closed ___ Python tracker

Re: how to multiply two matrices with different size?

On Fri, Nov 18, 2016 at 6:51 PM, wrote: > Hi :) > I'm trying to multiply two matrices that has different size. > > -code- > > import numpy as np > > a = np.random.randn(4, 3) > b = np.random.randn(4, 1) > > print

[issue28739] PEP 498: docstrings as f-strings

Eric V. Smith added the comment: It's Ned's call, but I wouldn't recommend changing this in 3.6, at least not 3.6.0. As Martin points out, the reason f'foo' is a "normal" string has to do with how strings and f-strings are assembled and concatenated. Similarly: 'foo' f'bar' 'baz' is a normal

[issue28742] argparse.ArgumentDefaultsHelpFormatter sometimes provides inaccurate documentation of defaults, so they should be overrideable

New submission from Peter Eckersley: When argparse lists the default values for cli flags and arguments, it shows argparse's view of the internal Pythonic default, not the default behaviour of the program as a whole. This can be wrong in many cases, as documented at

how to multiply two matrices with different size?

Hi :) I'm trying to multiply two matrices that has different size. -code- import numpy as np a = np.random.randn(4, 3) b = np.random.randn(4, 1) print a print b -code- How

[issue10049] Add a "no-op" (null) context manager to contextlib

Giampaolo Rodola' added the comment: ExitStack() already covers the "null ctx mgr" use case described in the first message. Original example: with transaction or contextlib.null(): ... By using ExitStack: with transaction or ExitStack(): ... You can push this further and do

Re: Encountering fatal error x80070643 while installing Python

On Fri, Nov 18, 2016 at 5:55 PM, MRAB wrote: > On 2016-11-18 11:40, Irene Venditti wrote: >> >> This didn't seem to be a problem, since version 3.5.1 installed to my >> C:\Users\username\appdata\local\... directory. But when I tried to install >> Python 3.5.2 and

[issue28742] argparse.ArgumentDefaultsHelpFormatter sometimes provides inaccurate documentation of defaults, so they should be overrideable

Peter Eckersley added the comment: One thing I noticed when testing my patch by vendorizing it into the Certbot tree was that if a developer had somehow inherited from a version of argparse.Action that *doesn't* have this patch applied to it, and then passes in instances of those inheriting

[issue28743] test_choices_algorithms() in test_random uses lots of memory

New submission from Martin Panter: Revision 32bfc8b6 added test.test_random.MersenneTwister_TestBasicOps.test_choices_algorithms(), which runs the following code: n = 13132817 # 13 million self.gen.choices(range(n), [1]*n, k=1) When I build Python with the “--with-pydebug” configure

[issue28739] PEP 498: docstrings as f-strings

Guido van Rossum added the comment: Might I point out the precedent of b-strings? Those also don't contribute to __doc__. -- ___ Python tracker ___

[issue28739] PEP 498: docstrings as f-strings

Ned Deily added the comment: Since this was previously discussed and rejected (in Issue25179), I don't think we should revisit this now for 3.6, other than potentially a documentation tweak. -- nosy: +ned.deily versions: -Python 3.6 ___ Python

[issue28742] argparse.ArgumentDefaultsHelpFormatter sometimes provides inaccurate documentation of defaults, so they should be overrideable

Peter Eckersley added the comment: Patch is now against the latest Python development tree, and includes test cases: https://gist.github.com/pde/daec08cadc21bca0d62852020887ee13 -- ___ Python tracker

How to append a modified list into a list?

I have a working list 'tbl' and recording list 'm'. I want to append 'tbl' into 'm' each time when the 'tbl' was modified. I will record the change by append it through the function 'apl'. For example: >>>tbl=[0,0] >>>m=[] >>>tbl[0]=1 >>>apl(tbl) >>>m [[1,0]] >>>tbl[1]=2 >>>apl(tbl) >>>m

[issue28744] Basic precision calc error

New submission from Renner: Simple code: print('%.55f' %(1.1 + 2.2 - 3.3)) print('%.55f' %(1.1 + 2.2)) is supposed to produce 0.000 3.300 But when I run it, Actually it produces

Re: How to append a modified list into a list?

On Nov 18, 2016 6:47 PM, wrote: I have a working list 'tbl' and recording list 'm'. I want to append 'tbl' into 'm' each time when the 'tbl' was modified. I will record the change by append it through the function 'apl'. For example: >>>tbl=[0,0] >>>m=[] >>>tbl[0]=1

[issue10049] Add a "no-op" (null) context manager to contextlib

Martin Blais added the comment: I've been looking for this today; I would have used it. Instead of an obvious (and explicit) null context manager, I had to read through this entire thread to eventually find out that I can use something called ExitStack(), which is designed for another use

[issue28732] spawnl crash on windows7

Steve Dower added the comment: Looks like a few functions in os module need this. os_execve_impl also doesn't release the GIL at any point, but I don't see why it shouldn't. I'll try and get to this over the weekend if nobody else comes up with a patch first. --

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