[issue12202] Check status returns in msilib.SummaryInformation.GetProperty()

[Berker Peksag]

Change by Berker Peksag :


--
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[issue12382] [msilib] Obscure exception message when trying to open a non-existent MSI database

[Berker Peksag]

Change by Berker Peksag :


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[issue12239] msilib VT_EMPTY SummaryInformation properties raise an error (suggest returning None)

[Berker Peksag]

Change by Berker Peksag :


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[issue1104] msilib.SummaryInfo.GetProperty() truncates the string by one character

[Berker Peksag]

Change by Berker Peksag :


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[issue1102] Add support for _msi.Record.GetString() and _msi.Record.GetInteger()

[Berker Peksag]

Berker Peksag  added the comment:

I've opened PR 4459 to fix this. Here's a simple reproducer I adapted from the 
script uploaded by uday kiran in issue 32064.

--
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versions: +Python 3.6, Python 3.7 -Python 3.4, Python 3.5

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[issue32064] python msilib view.fetch is not returning none

[Berker Peksag]

Berker Peksag  added the comment:

Issue 1102 is still open so this bug is not fixed yet. I've just opened PR 4459 
to fix it.

--
nosy: +berker.peksag
resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> Add support for _msi.Record.GetString() and 
_msi.Record.GetInteger()
type: crash -> behavior

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[issue1102] Add support for _msi.Record.GetString() and _msi.Record.GetInteger()

[Berker Peksag]

Change by Berker Peksag :


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[issue31875] Error 0x80070642: Failed to install MSI package.

[Nick Coghlan]

Change by Nick Coghlan :


--
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[issue32022] Python crashes with mutually recursive code

[Jesse Bakker]

Jesse Bakker  added the comment:

On linux x86-64 with python 3.6.3 and python 3.7.0a2+ I get a RecursionError: 
maximum recursion depth exceeded.

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[issue32071] Add py.test-like "-k" test selection to unittest

[Antoine Pitrou]

Antoine Pitrou  added the comment:

I think this would be a useful enhancement.  Feel free to open a PR.  I haven't 
looked at your implementation, but you'll also need to add tests for it.

--
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stage:  -> needs patch
versions: +Python 3.7

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[issue32073] Add copy_directory_metadata parameter to shutil.copytree

[desbma]

Change by desbma :


--
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[issue32072] Issues with binary plists

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
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pull_requests: +4393
stage:  -> patch review

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[issue32073] Add copy_directory_metadata parameter to shutil.copytree

[desbma]

New submission from desbma :

I am sometimes using shutil.copytree to copy a directory to a destination that 
does not support setting metadata (like MTP mounts of Android devices).

Using the copy_function parameter allows passing shutil.copy or a custom 
function to ignore file metadata, however currently shutil.copytree always 
tries to call copystat on directories, which can fail with OSError (errno set 
to ENOTSUPP).

The code assumes copystat can fail on Windows, but propagates the error on 
other OS, even though the tree copy actually succeeds.
See 
https://github.com/python/cpython/blob/9bb6fe52742340f6c92f0dda18599a4577a94e18/Lib/shutil.py#L352-L357

--
components: Library (Lib)
messages: 306494
nosy: desbma
priority: normal
severity: normal
status: open
title: Add copy_directory_metadata parameter to shutil.copytree
type: enhancement
versions: Python 3.7

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[issue32072] Issues with binary plists

[Serhiy Storchaka]

New submission from Serhiy Storchaka :

plistlib creates a new objects when read references instead of using
already read object.

As result it doesn't preserve identity:

>>> import plistlib
>>> a = [['spam']]*2
>>> a[0] is a[1]
True
>>> b = plistlib.loads(plistlib.dumps(a, fmt=plistlib.FMT_BINARY))
>>> b == a
True
>>> b[0] is b[1]
False

And plistlib.loads() is vulnerable to plists containing cyclic
references (as was exposed in issue31897). For example,
plistlib.loads(b'bplist00\xa1\x00\x08\x00\x00\x00\x00\x00\x00\x01\x01\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0a')
could return a list containing itself, but it is failed with
RecursionError.

plistlib.dumps() preserves reference in the output, but it saves
redundant copies. For example plistlib.dumps([[]]*5,
fmt=plistlib.FMT_BINARY) saves a list containing 5 identical empty
lists, but it saves an empty list 5 times, and only the last copy is
used. The other 4 copies are not referenced and just spent the file
volume and the space of reference numbers. Saving
['spam']*100]*100]*100]*100]*100 will result in a multigigabyte,
while less than a kilobyte would be enough for saving it. Loading
properly saved ['spam']*100]*100]*100]*100]*100 withe the current
plistlib.loads() will cause consuming many gigabytes of memory.

1. The issues with plistlib.dumps() are:
1a) Inefficient saving data with references. This is minor resource usage issue.
1b) Impossibility to save a data with cyclic references. This is a
lack of a feature.

2. The issues with plistlib.loads() are:
2a) Inefficient loading data with references. This can be not just a
resource usage issue, but a security issue. Loading an malicious input
data smaller than 100 byte ([[[...]*2]*2]*2) can cause consuming many
gigabytes of memory.
2b) Impossibility to load a data with cyclic references. This is a
lack of a feature, but can be lesser security issue. Small malicious
input can cause RecursionError. If the recursion limit is set high and
you are unlucky it can cause a stack overflow.

Security issues affect you only when you load plists from untrusted sources.

Adding the proper support of references could be considered a new
feature, but taking to account security issues it should be backported
up to 3.4 when the support of binary plists was added.

--
assignee: serhiy.storchaka
components: Library (Lib)
messages: 306493
nosy: ned.deily, ronaldoussoren, serhiy.storchaka
priority: normal
severity: normal
status: open
title: Issues with binary plists
type: security
versions: Python 3.4, Python 3.5, Python 3.6, Python 3.7

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[issue32071] Add py.test-like "-k" test selection to unittest

[Jonas H.]

Jonas H.  added the comment:

Just to be clear, the current implementation is limited to substring matches. 
It doesn't support py.test like "and/or" combinators. (Actually, py.test uses 
'eval' to support arbitrary patterns.)

So say we have test case

SomeClass
test_foo
test_bar

Then

- python -m unittest -k fo matches "test_foo"
- python -m unittest -k Some matches "test_foo" and "test_bar"
- python -m unittest -k some matches nothing

The -k option may be used multiple times, combining the patterns with "or":

- python -m unittest -k fo -k b matches "test_foo" and "test_bar"

It's also possible to use glob-style patterns, like -k "spam_*_eggs".

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[issue32067] Deprecate accepting unrecognized braces in regular expressions

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Since this will require changing regular expressions in several places in the 
stdlib I have chosen emitting PendingDeprecationWarning and long deprecation 
period.

But I'm now not sure that this is a good idea. Non-escaped braces can be used 
much in a wild. It may be better to use other heuristic for recognizing the 
fuzzy matching and other possible extensions that use braces.

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[issue32071] Add py.test-like "-k" test selection to unittest

[Jonas H.]

New submission from Jonas H. :

I'd like to add test selection based on parts of the test class/method name to 
unittest. Similar to py.test's "-k" option: 
https://docs.pytest.org/en/latest/example/markers.html#using-k-expr-to-select-tests-based-on-their-name

Here's a proof of concept implementation: 
https://github.com/jonashaag/cpython/compare/master...unittest-select

Is this something others find useful as well? If so, I'd like to work on 
getting this into Python stdlib proper. This is my first time contributing to 
the unittest framework; is the general approach taken in my PoC implementation 
correct in terms of abstractions? How can I improve the implementation?

Jonas

--
components: Library (Lib)
messages: 306490
nosy: jonash
priority: normal
severity: normal
status: open
title: Add py.test-like "-k" test selection to unittest
type: enhancement

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[issue32067] Deprecate accepting unrecognized braces in regular expressions

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
keywords: +patch
pull_requests: +4392
stage:  -> patch review

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[issue32070] Clarify the behavior of the staticmethod builtin

[Jesse SHapiro]

New submission from Jesse SHapiro :

It looks like the original staticmethod docstring might have been based on the 
classmethod docstring, and it seems like the current description might not be 
accurate.

Current string:

...It can be called either on the class (e.g. C.f()) or on an instance (e.g. 
C().f()); the instance is ignored except for its class...

Proposed change:

It can be called either on the class (e.g. C.f()) or on an instance (e.g. 
C().f()). Both the class and the instance are ignored, and neither is passed 
implicitly as the first argument to the method.

--
assignee: docs@python
components: Documentation
messages: 306489
nosy: docs@python, haikuginger
priority: normal
pull_requests: 4391
severity: normal
status: open
title: Clarify the behavior of the staticmethod builtin
type: enhancement

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[issue32004] Allow specifying code packing order in audioop adpcm functions

[MosesofEgypt]

MosesofEgypt  added the comment:

Changed type to behavior as this is more of a bug fix than an enhancement.

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[issue32031] Do not use the canonical path in pydoc test_mixed_case_module_names_are_lower_cased

[Xavier de Gaye]

Change by Xavier de Gaye :


--
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stage: patch review -> resolved
status: open -> closed

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[issue32031] Do not use the canonical path in pydoc test_mixed_case_module_names_are_lower_cased

[Xavier de Gaye]

Xavier de Gaye  added the comment:


New changeset ebfaa71c2e8c018f72c179395dafaf06dcaf29e2 by xdegaye in branch 
'master':
bpo-32031: Fix pydoc `test_mixed_case_module_names_are_lower_cased` (GH-4441)
https://github.com/python/cpython/commit/ebfaa71c2e8c018f72c179395dafaf06dcaf29e2


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[issue32069] Drop loop._make_legacy_ssl_transport

[Andrew Svetlov]

Change by Andrew Svetlov :


--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions:  -Python 3.6

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[issue29185] test_distutils fails on Android API level 24

[Xavier de Gaye]

Change by Xavier de Gaye :


--
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stage: patch review -> resolved
status: open -> closed

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[issue29185] test_distutils fails on Android API level 24

[Xavier de Gaye]

Xavier de Gaye  added the comment:


New changeset d34d8fc24f23ccff5de03c9277da5acbbdc30e90 by xdegaye in branch 
'master':
bpo-29185: Fix `test_distutils` failures on Android (GH-4438)
https://github.com/python/cpython/commit/d34d8fc24f23ccff5de03c9277da5acbbdc30e90


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[issue29184] skip tests of test_socketserver when bind() raises PermissionError (non-root user on Android)

[Xavier de Gaye]

Change by Xavier de Gaye :


--
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stage: patch review -> resolved
status: open -> closed

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[issue29184] skip tests of test_socketserver when bind() raises PermissionError (non-root user on Android)

[Xavier de Gaye]

Xavier de Gaye  added the comment:


New changeset 9001d1f438e968f4d327313e0a95a49f22e724f4 by xdegaye in branch 
'master':
bpo-29184: Skip test_socketserver tests on PermissionError raised by Android 
(GH-4387)
https://github.com/python/cpython/commit/9001d1f438e968f4d327313e0a95a49f22e724f4


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[issue32059] detect_modules() in setup.py must also search the sysroot paths

[Xavier de Gaye]

Change by Xavier de Gaye :


--
nosy: +brett.cannon, martin.panter, twouters

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[issue32069] Drop loop._make_legacy_ssl_transport

[Roundup Robot]

Change by Roundup Robot :


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[issue32069] Drop loop._make_legacy_ssl_transport

[Andrew Svetlov]

Andrew Svetlov  added the comment:


New changeset 51d546ae4d563fde608e23c9c337fefd7e95c93f by Andrew Svetlov in 
branch 'master':
bpo-32069: Drop legacy SSL transport (#4451)
https://github.com/python/cpython/commit/51d546ae4d563fde608e23c9c337fefd7e95c93f


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[issue32059] detect_modules() in setup.py must also search the sysroot paths

[Xavier de Gaye]

Change by Xavier de Gaye :


--
keywords: +patch
pull_requests: +4389
stage: needs patch -> patch review

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[issue1647489] zero-length match confuses re.finditer()

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
components: +Library (Lib)
nosy: +ezio.melotti
type:  -> behavior

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[issue1647489] zero-length match confuses re.finditer()

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
assignee: niemeyer -> serhiy.storchaka
nosy: +serhiy.storchaka
versions: +Python 3.6, Python 3.7

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[issue32069] Drop loop._make_legacy_ssl_transport

[Andrew Svetlov]

Change by Andrew Svetlov :


--
keywords: +patch
pull_requests: +4388
stage:  -> patch review

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[issue32069] Drop loop._make_legacy_ssl_transport

[Yury Selivanov]

Yury Selivanov  added the comment:

+1

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[issue32069] Drop loop._make_legacy_ssl_transport

[Andrew Svetlov]

New submission from Andrew Svetlov :

It uses `wrap_socket` and exists only for backward compatibility with Python 
without ssl.MemoryBIO, which is Python 3.4

Let's cut it out from Python 3.7 and 3.6 -- it's safe, pretty sure.

--
components: Library (Lib), asyncio
messages: 306482
nosy: asvetlov, yselivanov
priority: normal
severity: normal
status: open
title: Drop loop._make_legacy_ssl_transport
versions: Python 3.6, Python 3.7

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[issue31943] Add asyncio.Handle.cancelled() method

[Marat Sharafutdinov]

Change by Marat Sharafutdinov :


--
versions: +Python 3.7 -Python 3.6

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[issue32068] textpad from curses package isn't handling backspace key

[Slava Bacherikov]

New submission from Slava Bacherikov :

textpad isn't handling backspace key on my system and seems on others too. When 
I press backspace key, terminal sends `ascii.DEL` (127) and it isn't handled by 
textpad.

I've attached patch that fixes this, should I also create PR for this or patch 
is enough ?

--
components: Library (Lib)
files: textpad.patch
keywords: patch
messages: 306481
nosy: bacher09
priority: normal
severity: normal
status: open
title: textpad from curses package isn't handling backspace key
type: behavior
versions: Python 3.7
Added file: https://bugs.python.org/file47272/textpad.patch

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[issue31943] Add asyncio.Handle.cancelled() method

[Andrew Svetlov]

Change by Andrew Svetlov :


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stage:  -> resolved
status: open -> closed

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[issue31630] math.tan has poor accuracy near pi/2 on OpenBSD and NetBSD

[Stefan Krah]

Stefan Krah  added the comment:

I found an unused i386 box with OpenBSD and Linux (so no VM):

A C program with tan(1.5707963267948961) is wrong on both systems.

fdlibm (directly from netlib.org) is correct on both systems.


Both OS versions are relatively old, so I cannot file an upstream issue.

I was planning to dig through the fdlibm code if there was an issue,
but it produces the correct results.

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[issue32067] Deprecate accepting unrecognized braces in regular expressions

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
title: Deprecate accepting -> Deprecate accepting unrecognized braces in 
regular expressions

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[issue32067] Deprecate accepting

[Serhiy Storchaka]

New submission from Serhiy Storchaka :

Currently `{m}`, `{m,n}`, `{m,}` and `{,n}` where m and n are non-negative 
decimal numbers are accepted in regular expressions as quantifiers that mean 
repeating the previous RE from m (0 by default) to n (infinity by default) 
times.

But if the opening brace '{'is not followed by one of the above patterns, it 
means just the literal '{'.

>>> import re
>>> re.search('(foobar){e}', 'xirefoabralfobarxie')
>>> re.search('(foobar){e}', 'foobar{e}')


This conflicts with the regex module which uses braces for defining the "fuzzy" 
matching.

>>> import regex
>>> regex.search('(foobar){e}', 'xirefoabralfobarxie')

>>> regex.search('(foobar){e}', 'foobar{e}')


I don't think it is worth to add support of fuzzy matching in the re module, 
but for compatibility it would be better to raise an error or a warning in case 
of '{' not following by the one of the recognized patterns. This could also 
help to catch typos and errors in regular expressions, i.e. in '-{1.2}' or 
'-{1, 2}' instead of '-{1,2}'.

Possible variants:

1. Emit a DeprecationWarning in 3.7 (and 2.7.15 with the -3 option), raise a 
re.error in 3.8 or 3.9.

2. Emit a PendingDeprecationWarning in 3.7, a DeprecationWarning in 3.8, and 
raise a re.error in 3.9 or 3.10.

3. Emit a RuntimeWarning or SyntaxWarning in 3.7 and forever.

4. Emit a FutureWarning in 3.7, and implement the fuzzy matching or replace re 
with regex sometimes in future. Unlikely.

--
assignee: serhiy.storchaka
components: Library (Lib), Regular Expressions
messages: 306479
nosy: ezio.melotti, mrabarnett, serhiy.storchaka
priority: normal
severity: normal
status: open
title: Deprecate accepting
type: enhancement
versions: Python 3.7

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[issue31630] math.tan has poor accuracy near pi/2 on OpenBSD and NetBSD

[Stefan Krah]

Stefan Krah  added the comment:

Tim has mentioned the high quality of fdlibm, and indeed I cannot
reproduce the issue:

wget -r http://www.netlib.org/fdlibm/

Then build libm with or without optimizations, with or without -m32,
gcc or clang.


Then compile a C program that calls tan(1.5707963267948961).


This is a bit treacherous, because gcc apparently has a builtin
tan(), so one needs to make sure that it actually uses fdlibm.

gcc-4.7 -fno-builtin -O3 -m32 -Wall -W -o xxx xxx.c libm.a


All is fine here (Ubuntu Linux).

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[issue32050] Deprecated python3 -x option

[STINNER Victor]

STINNER Victor  added the comment:

Ok, I will update the doc instead of deprecating the option.

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[issue32050] Deprecated python3 -x option

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

It seems to me that the best way is to add the following line at the start of 
the script:

@path\to\python -x %0 %* & exit /b

Or

@py -3 -x %0 %* & exit /b

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