[issue30545] Enum equality across modules: comparing objects instead of values

[Ethan Furman]

Ethan Furman  added the comment:

What you have discovered is not Enum specific, but in fact can happen with any 
module (as stated in my first comment in this bug report).

Maybe these SO question will help:

https://stackoverflow.com/q/2489601/208880

https://stackoverflow.com/a/4798648/208880

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[issue34376] Improve accuracy of math.hypot() and math.dist()

[Stefan Behnel]

Stefan Behnel  added the comment:

Could we maybe make an educated guess based on absmin and absmax whether 
scaling is needed or not?

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[issue34369] kqueue.control() documentation and implementation mismatch

[Tal Einat]

Tal Einat  added the comment:

In Python 3.8 this will have already been fixed (thanks to the recent 
conversion of the select module to use Argument Clinic); see below output from 
a recent build from the master branch.

Given that, is this worth fixing on 2.7 and <3.8?


Help on built-in function control:

control(changelist, maxevents, timeout=None, /) method of select.kqueue instance
Calls the kernel kevent function.

changelist
  Must be an iterable of kevent objects describing the changes to be made
  to the kernel's watch list or None.
maxevents
  The maximum number of events that the kernel will return.
timeout
  The maximum time to wait in seconds, or else None to wait forever.
  This accepts floats for smaller timeouts, too.

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[issue21314] Document '/' in signatures

[Berker Peksag]

Berker Peksag  added the comment:

I'd suggest adding a FAQ entry to the "Core Language" section at 
https://docs.python.org/3/faq/programming.html#core-language then we can link 
to it from the places (except pydoc docs) Zachary listed in msg223893.

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[issue30411] git doesn't support "-C" args under 1.8.5 occurs in configure.ac

[Xiang Zhang]

Change by Xiang Zhang :


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stage:  -> patch review

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[issue34386] Expose a dictionary of interned strings in sys module

[Artem Golubin]

New submission from Artem Golubin :

Python provides an ability to intern strings (sys.intern). It would be useful 
to expose a read-only dictionary of interned strings to the Python users so we 
can see what kind of strings are interned. 

It takes minimal changes since internally it's just a dictionary. Is this worth 
adding to the sys module?

--
components: Interpreter Core
messages: 323437
nosy: rushter
priority: normal
severity: normal
status: open
title: Expose a dictionary of interned strings in sys module
type: enhancement
versions: Python 3.8

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[issue34369] kqueue.control() documentation and implementation mismatch

[Martin Panter]

Martin Panter  added the comment:

Even in 3.8, the main documentation is not fixed: 
https://docs.python.org/dev/library/select.html#kqueue-objects

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[issue34369] kqueue.control() documentation and implementation mismatch

[Tal Einat]

Tal Einat  added the comment:

We can just remove the "=None" in the docs for select.kqueue.control() to 
conform with the rest of that doc.

We don't use the PEP 457 slash notation in the docs for select (or perhaps at 
all?).

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[issue34386] Expose a dictionary of interned strings in sys module

[Ronald Oussoren]

Ronald Oussoren  added the comment:

Could you explain why this would be useful?

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[issue34213] Frozen dataclass __init__ fails for "object" property"

[Eric V. Smith]

Eric V. Smith  added the comment:


New changeset 4d12e4dc28b7c782c368bae2e8fd3815167ed37d by Eric V. Smith (Vadim 
Pushtaev) in branch 'master':
bpo-34213: Allow dataclasses to work with a field named 'object'. (GH-8452)
https://github.com/python/cpython/commit/4d12e4dc28b7c782c368bae2e8fd3815167ed37d


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[issue34213] Frozen dataclass __init__ fails for "object" property"

[miss-islington]

Change by miss-islington :


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[issue34387] Deletion of attributes in dataclass is buggy!

[Kamyar Inanloo]

New submission from Kamyar Inanloo :

When using del or delattr on an instance of dataclass, attribute does not get 
deleted truly! using vars or getattr still returns the deleted attribute just 
using delattr again raises error!

--
components: Argument Clinic
messages: 323442
nosy: Kamyar Inanloo, larry
priority: normal
severity: normal
status: open
title: Deletion of attributes in dataclass is buggy!
type: behavior
versions: Python 3.7

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[issue24076] sum() several times slower on Python 3 64-bit

[Stefan Behnel]

Stefan Behnel  added the comment:

FWIW, a PGO build of Py3.7 is now about 20% *faster* here than my Ubuntu 16/04 
system Python 2.7, and for some (probably unrelated) reason, the system Python 
3.5 is another 2% faster on my side.

IMHO, the only other thing that seems obvious to try would be to inline the 
unpacking of single digit PyLongs into sum(). I attached a simple patch that 
does that, in case someone wants to test it out. For non-PGO builds, it's about 
17% faster for me. Didn't take the time to benchmark PGO builds with it.

--
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Added file: https://bugs.python.org/file47748/unpack_single_digits.patch

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[issue24076] sum() several times slower on Python 3 64-bit

[Antoine Pitrou]

Change by Antoine Pitrou :


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[issue34213] Frozen dataclass __init__ fails for "object" property"

[miss-islington]

Change by miss-islington :


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[issue34387] Deletion of attributes in dataclass is buggy!

[Berker Peksag]

Change by Berker Peksag :


--
components: +Library (Lib) -Argument Clinic
nosy: +eric.smith -larry

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[issue22602] UTF-7 codec decodes ill-formed sequences starting with "+"

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

What about a "+" character followed immediately by the end of the bytestring?

>>> b'+'.decode('utf-7')
''

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[issue30871] Add test.pythoninfo

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:

pythoninfo is failing on several buildbots:


https://buildbot.python.org/all/#/builders/102/builds/55
https://buildbot.python.org/all/#/builders/79/builds/237
https://buildbot.python.org/all/#/builders/112/builds/161
https://buildbot.python.org/all/#/builders/118/builds/164
https://buildbot.python.org/all/#/builders/56/builds/105
https://buildbot.python.org/all/#/builders/18/builds/109

Example error:

./python -m test.pythoninfo
ERROR: collect_gdb() failed
Traceback (most recent call last):
  File 
"/usr/home/buildbot/python/2.7.koobs-freebsd-current.nondebug/build/Lib/test/pythoninfo.py",
 line 561, in collect_info
collect_func(info_add)
  File 
"/usr/home/buildbot/python/2.7.koobs-freebsd-current.nondebug/build/Lib/test/pythoninfo.py",
 line 300, in collect_gdb
version = version.splitlines()[0]
IndexError: list index out of range

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[issue30871] Add test.pythoninfo

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


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[issue34388] collect_gdb fails for test.pythoninfo in several buildbots

[Pablo Galindo Salgado]

New submission from Pablo Galindo Salgado :

collect_gdb fails for the test.pythoninfo step in several buildbots:

https://buildbot.python.org/all/#/builders/102/builds/55
https://buildbot.python.org/all/#/builders/79/builds/237
https://buildbot.python.org/all/#/builders/112/builds/161
https://buildbot.python.org/all/#/builders/118/builds/164
https://buildbot.python.org/all/#/builders/56/builds/105
https://buildbot.python.org/all/#/builders/18/builds/109

Example error:

./python -m test.pythoninfo
ERROR: collect_gdb() failed
Traceback (most recent call last):
  File 
"/usr/home/buildbot/python/2.7.koobs-freebsd-current.nondebug/build/Lib/test/pythoninfo.py",
 line 561, in collect_info
collect_func(info_add)
  File 
"/usr/home/buildbot/python/2.7.koobs-freebsd-current.nondebug/build/Lib/test/pythoninfo.py",
 line 300, in collect_gdb
version = version.splitlines()[0]
IndexError: list index out of range

--
components: Build, Tests
messages: 323446
nosy: pablogsal
priority: normal
severity: normal
status: open
title: collect_gdb fails for test.pythoninfo in several buildbots
type: crash
versions: Python 3.6, Python 3.7, Python 3.8

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[issue30871] Add test.pythoninfo

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:

All of these failures seems related to `collect_gdb`  I am going to open a new 
issue:

https://bugs.python.org/issue34388

Please, re-open this one if you think is better to have both open.

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[issue34376] Improve accuracy of math.hypot() and math.dist()

[Tim Peters]

Tim Peters  added the comment:

Sure, if we make more assumptions.  For 754 doubles, e.g., scaling isn't needed 
if `1e-100 < absmax < 1e100` unless there are a truly ludicrous number of 
points.  Because, if that holds, the true sum is between 1e-200 and 
number_of_points*1e200, both far from being near trouble.

Then the summation loop gets mostly duplicated (with and without scaling), a 
platform-dependent assumption is introduced, and we need two test-and-branches 
to determine which to run.  In the common two-argument cases, it saves one 
division in return.

Note that without the current form of scaling, we lose the guarantee that the 
sum is exact when all the arguments are the same (because they're all scaled to 
exactly 1.0 then, but in general each x*x loses half the product bits without 
scaling).  I don't care about that myself, but Serhiy seems to.

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[issue34388] collect_gdb fails for test.pythoninfo in several buildbots

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:

The origin of this can be related to https://bugs.python.org/issue30871

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[issue34388] collect_gdb fails for test.pythoninfo in several AMD64 FreeBSD buildbots

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


--
title: collect_gdb fails for test.pythoninfo in several buildbots -> 
collect_gdb fails for test.pythoninfo in several AMD64 FreeBSD buildbots

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[issue34388] collect_gdb fails for test.pythoninfo in several AMD64 FreeBSD buildbots

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


--
versions: +Python 2.7

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[issue34386] Expose a dictionary of interned strings in sys module

[Raymond Hettinger]

Raymond Hettinger  added the comment:

I wouldn't want a user to be able to mutate the dictionary directly (otherwise, 
non-strings could be added).

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[issue34385] Failed to build these modules: _ctypes on Solaris 10

[LarBob Doomer]

LarBob Doomer  added the comment:

This is due to it not finding the external libffi I have.

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status: open -> closed

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[issue34389] CPython may fail to build in the presence of a ~/.pydistutils.cfg

[Antony Lee]

New submission from Antony Lee :

I have a ~/.pydistutils.cfg with the following contents:

[build_ext]
force = true
inplace = true

(--force is useful because sometimes just comparing timestamps is insufficient 
to know whether a package needs to be rebuilt, e.g. in the presence of external 
dependencies -- and I use ccache anyways to avoid paying for excessive 
rebuilds; --inplace is useful as I have quite a few packages with extension 
modules that are editably-installed).

With this ~/.pydistutils.cfg, cpython fails to build.  For example, having 
checked out v3.7.0 from a git clone (otherwise clean git repo, per `git clean 
-xfd`),

mkdir build && cd build && ../configure && make

ultimately results in



gcc -pthread -shared 
build/temp.linux-x86_64-3.7/home/antony/src/extern/cpython/Modules/_ctypes/_ctypes.o
 
build/temp.linux-x86_64-3.7/home/antony/src/extern/cpython/Modules/_ctypes/callbacks.o
 
build/temp.linux-x86_64-3.7/home/antony/src/extern/cpython/Modules/_ctypes/callproc.o
 
build/temp.linux-x86_64-3.7/home/antony/src/extern/cpython/Modules/_ctypes/stgdict.o
 
build/temp.linux-x86_64-3.7/home/antony/src/extern/cpython/Modules/_ctypes/cfield.o
 -L/usr/local/lib -lffi -ldl -o 
/home/antony/src/extern/cpython/build/_ctypes.cpython-37m-x86_64-linux-gnu.so
*** WARNING: renaming "_struct" since importing it failed: 
build/lib.linux-x86_64-3.7/_struct.cpython-37m-x86_64-linux-gnu.so: cannot open 
shared object file: No such file or directory
Traceback (most recent call last):
File "../setup.py", line 442, in check_extension_import
importlib._bootstrap._load(spec)
File "", line 696, in _load
File "", line 670, in _load_unlocked
File "", line 583, in module_from_spec
File "", line 1043, in create_module
File "", line 219, in _call_with_frames_removed
ImportError: 
build/lib.linux-x86_64-3.7/_struct.cpython-37m-x86_64-linux-gnu.so: cannot open 
shared object file: No such file or directory

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "../setup.py", line 2363, in 
main()
File "../setup.py", line 2358, in main
"Tools/scripts/2to3", "Tools/scripts/pyvenv"]
File "/home/antony/src/extern/cpython/Lib/distutils/core.py", line 148, in 
setup
dist.run_commands()
File "/home/antony/src/extern/cpython/Lib/distutils/dist.py", line 966, in 
run_commands
self.run_command(cmd)
File "/home/antony/src/extern/cpython/Lib/distutils/dist.py", line 985, in 
run_command
cmd_obj.run()
File "/home/antony/src/extern/cpython/Lib/distutils/command/build.py", line 
135, in run
self.run_command(cmd_name)
File "/home/antony/src/extern/cpython/Lib/distutils/cmd.py", line 313, in 
run_command
self.distribution.run_command(command)
File "/home/antony/src/extern/cpython/Lib/distutils/dist.py", line 985, in 
run_command
cmd_obj.run()
File "/home/antony/src/extern/cpython/Lib/distutils/command/build_ext.py", 
line 339, in run
self.build_extensions()
File "../setup.py", line 308, in build_extensions
self.check_extension_import(ext)
File "../setup.py", line 447, in check_extension_import
assert not self.inplace
AssertionError
make: *** [Makefile:618: sharedmods] Error 1

Removing the ~/.pydistutils.cfg fixes the issue and leads to a successful build.

I think(?) CPython's build system should essentially make sure that distutils 
behaves as if `--no-user-cfg` was in effect.  Or at least the limitation should 
be documented, but it's not very practical to have to temporarily rename an 
existing ~/.pydistutils.cfg whenever building CPython.  See also 
https://bugs.python.org/issue9309, perhaps.

--
components: Build
messages: 323452
nosy: Antony.Lee
priority: normal
severity: normal
status: open
title: CPython may fail to build in the presence of a ~/.pydistutils.cfg
versions: Python 3.7

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[issue34387] Deletion of attributes in dataclass is buggy!

[Raymond Hettinger]

Change by Raymond Hettinger :


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assignee:  -> eric.smith

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[issue34386] Expose a dictionary of interned strings in sys module

[Ronald Oussoren]

Ronald Oussoren  added the comment:

Another reason for not wanting write access to the sys.intern dictionary is 
that this dictionary does not own references to its keys and values.

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[issue34387] Deletion of attributes in dataclass is buggy!

[Kamyar Inanloo]

Kamyar Inanloo  added the comment:

Actually it just sets the attribute to its default value, instead of removing 
it from the instance.

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[issue24111] Valgrind suppression file should be updated

[Benjamin Peterson]

Change by Benjamin Peterson :


--
resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> Update valgrind suppressions

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[issue34386] Expose a dictionary of interned strings in sys module

[Artem Golubin]

Artem Golubin  added the comment:

Thank you, I agree. I can't come up with practical use cases other than my 
curiosity. 

Is it possible to somehow expose the dictionary in the debug build of Python? 
Currently, there is no way to access it from the interpreter even with ctypes.

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[issue34370] Tkinter scroll issues on macOS

[Terry J. Reedy]

Change by Terry J. Reedy :


--
nosy: +serhiy.storchaka, wordtech

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[issue33073] Add as_integer_ratio() to int() objects

[Lisa Roach]

Change by Lisa Roach :


--
keywords: +patch
pull_requests: +8230
stage:  -> patch review

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[issue4508] distutils compiler not handling spaces in path to output/src files

[Greg Toombs]

Greg Toombs  added the comment:

Confirmed still broken in 3.6.3.

I ran into this when running CFFI. It does very wrong things with the path to 
cl.exe and include files with path spaces.

My workaround is to monkeypatch distutils.ccompiler.gen_preprocess_options such 
that include paths are formed as -I"path" and not -Ipath; and to monkeypatch 
distutils.spawn._nt_quote_args so that it leaves all of the arguments unquoted 
except the first arg (path to cl.exe), which I only got working by using 
tilde-mangled short names.

--
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versions: +Python 3.6

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[issue34387] Deletion of attributes in dataclass is buggy!

[Eric V. Smith]

Eric V. Smith  added the comment:

I think this is just normal behavior with classes. But since you haven't shown 
any code, I can't tell exactly what you're doing and what you're expecting.

When providing bug reports, you need to provide:
- Exactly what code you're executing.
- Exactly what output you're seeing.
- What you expect if it's different from what you're seeing.

Please provide this in the body of a message as text, not (for example) as an 
attached image file.

Thanks.

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[issue34390] arparse.ArgumentParser misparses list arguments followed by undefined arguments

[Matthias Fripp]

New submission from Matthias Fripp :

The code below demonstrates this bug.

import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--list-arg', nargs='+', default=[])
parser.parse_known_args(['--list-arg', 'a', '--text-arg=hello world'])

The result should be (Namespace(list_arg=['a']), ['--text-arg=hello world']), 
but is actually (Namespace(list_arg=['a', '--text-arg=hello world']), []). 
i.e., --list-arg consumes the next argument if that argument hasn't been 
defined and uses an equal sign and has a space in the assigned value.

Note that both of the following work correctly:

parser.parse_known_args(['--list-arg', 'a', '--text-arg', 'hello world'])
parser.parse_known_args(['--list-arg', 'a', '--text-arg=hello'])

Further, the next line should cause an error, but doesn't, due to the behavior 
noted above:

parser.parse_args(['--list-arg', 'a', '--text-arg=hello world'])

--
components: Library (Lib)
messages: 323458
nosy: Matthias Fripp
priority: normal
severity: normal
status: open
title: arparse.ArgumentParser misparses list arguments followed by undefined 
arguments
type: behavior
versions: Python 2.7, Python 3.4, Python 3.5, Python 3.6, Python 3.7, Python 3.8

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[issue34213] Frozen dataclass __init__ fails for "object" property"

[miss-islington]

miss-islington  added the comment:


New changeset 32e58fc32188753d2a3604feacdf9540fe9515fb by Miss Islington (bot) 
in branch '3.7':
bpo-34213: Allow dataclasses to work with a field named 'object'. (GH-8452)
https://github.com/python/cpython/commit/32e58fc32188753d2a3604feacdf9540fe9515fb


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nosy: +miss-islington

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[issue34384] os.readlink does not accept pathlib.Path on Windows

[Berker Peksag]

Berker Peksag  added the comment:

Steve and/or Eryk, I was adding some tests for os.readlink() in PR 8740 and I 
noticed that os.readlink() always returns str on Windows. However, the 
documentation for os.readlink() says:

If the path is a bytes object (direct or indirectly), the result will
be a bytes object.

The question is, should I add support for bytes as part of PR 8740? And what is 
the best way to implement it? (e.g. use CreateFileA() if 
PyUnicode_Check(path.object) returns false?)

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nosy: +eryksun

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[issue13837] test_shutil fails with symlinks enabled under Windows

[Berker Peksag]

Berker Peksag  added the comment:

Issue 20055 was a duplicate of this one. Both tests have been adjusted in 
https://github.com/python/cpython/commit/3f48ac98c04fc17f12c63dcf593dd0c19379c7df.

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dependencies:  -os.chmod() does not follow symlinks on Windows, 
os.path.realpath on Windows does not follow symbolic links
nosy: +berker.peksag
resolution:  -> duplicate
stage: needs patch -> resolved
status: open -> closed
superseder:  -> On Windows NT 6 with administrator account, there are two 
failing tests on test_shutil.py

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[issue34384] os.readlink does not accept pathlib.Path on Windows

[Berker Peksag]

Berker Peksag  added the comment:

In msg235615 (Issue 9949), Zachary said using bytes paths on Windows is 
deprecated, but I can't see the actual conversation because Rietveld seems to 
be down: https://bugs.python.org/review/9949/#ps5077 I think the os.readlink() 
documentation needs to be updated if we decide to keep the status quo.

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[issue18597] On Windows sys.stdin.readline() doesn't handle Ctrl-C properly

[Joshua Kinard]

Joshua Kinard  added the comment:

I was able to modify eryksun's patch for Python-2.7.15, at least the bulk of 
it.  It looks like the '_PyOS_SigintEvent' function is new to the 3.x branch, 
and despite it being a fairly simple function, it's used in a few core Python 
modules.  So I'm not sure the difficulty of adding it for Python-2.7.  Is there 
an alternative function available in the 2.7 code that I can replace it with?

I also don't have a clue how anyone even builds Python-2.7 on Windows, because 
getting the required tools properly installed borders on the arcane (esp VS2008 
tools).  So testing it might be a bit difficult.  Is there a cheat sheet 
somewhere?

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nosy: +kumba

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