[issue14715] test.support.DirsOnSysPath should be replaced by importlib.test.util.import_state

[Eric V. Smith]

Eric V. Smith  added the comment:

I don't think so. I don't think the patch even did what I wanted it to do. I'll 
close it.

--
resolution:  -> out of date
stage:  -> resolved
status: open -> closed

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[issue39480] referendum reference is needlessly annoying

[Aurora]

Aurora  added the comment:

This example is practically against Python's diversity statement.

--
nosy: +opensource-assist

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[issue36051] Drop the GIL during large bytes.join operations?

[Inada Naoki]

Change by Inada Naoki :


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

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[issue36051] Drop the GIL during large bytes.join operations?

[Inada Naoki]

Inada Naoki  added the comment:


New changeset d07d9f4c43bc85a77021bcc7d77643f8ebb605cf by Bruce Merry in branch 
'master':
bpo-36051: Drop GIL during large bytes.join() (GH-17757)
https://github.com/python/cpython/commit/d07d9f4c43bc85a77021bcc7d77643f8ebb605cf


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[issue39482] Write 2to3 fixer for MutableMapping

[Dong-hee Na]

Change by Dong-hee Na :


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nosy: +corona10

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[issue39476] Not convinced with the dynamic data type assignment

[Sushma]

Sushma  added the comment:

Thank you

On Tue, Jan 28, 2020, 6:30 PM Steven D'Aprano 
wrote:

>
> Steven D'Aprano  added the comment:
>
> The "num" variable is not a number, it *is* a string. Just because you
> call it "num" doesn't magically turn it into a number. The `input` function
> returns a string.
>
> You might be thinking of Python 2.7 where `input` automatically evaluated
> the string as Python code. Python 3 does not do that. If you want to
> convert the string result of `input` to be a float or an int or some other
> type, you need to call the `float` or `int` functions.
>
> --
> nosy: +steven.daprano
> resolution:  -> not a bug
> stage:  -> resolved
> status: open -> closed
>
> ___
> Python tracker 
> 
> ___
>

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[issue39482] Write 2to3 fixer for MutableMapping

[Karthikeyan Singaravelan]

Change by Karthikeyan Singaravelan :


--
nosy: +benjamin.peterson, xtreak

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[issue39482] Write 2to3 fixer for MutableMapping

[Orion Poplawski]

New submission from Orion Poplawski :

fail2ban currently relies on 2to3 for python 3 support.  Build now fails with 
python 3.9:

Traceback (most recent call last):
  File "/builddir/build/BUILD/fail2ban-0.11.1/bin/fail2ban-testcases", line 61, 
in 
tests = gatherTests(regexps, opts)
  File "./fail2ban/tests/utils.py", line 373, in gatherTests
from . import clientreadertestcase
  File "./fail2ban/tests/clientreadertestcase.py", line 34, in 
from ..client.jailreader import JailReader, extractOptions, splitWithOptions
  File "./fail2ban/client/jailreader.py", line 34, in 
from .actionreader import ActionReader
  File "./fail2ban/client/actionreader.py", line 31, in 
from ..server.action import CommandAction
  File "./fail2ban/server/action.py", line 33, in 
from collections import MutableMapping
ImportError: cannot import name 'MutableMapping' from 'collections' 
(/usr/lib64/python3.9/collections/__init__.py)

--
components: 2to3 (2.x to 3.x conversion tool)
messages: 360936
nosy: opoplawski
priority: normal
severity: normal
status: open
title: Write 2to3 fixer for MutableMapping
type: enhancement
versions: Python 3.9

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[issue25597] unittest.mock does not wrap dunder methods (__getitem__ etc)

[Karthikeyan Singaravelan]

Change by Karthikeyan Singaravelan :


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

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[issue25597] unittest.mock does not wrap dunder methods (__getitem__ etc)

[Joseph Gordon]

Change by Joseph Gordon :


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[issue25661] tokenize.untokenize does not maintain the order of tabbed indentations and leading spaces

[Joseph Gordon]

Change by Joseph Gordon :


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[issue24249] unittest API for detecting test failure in cleanup/teardown

[Joseph Gordon]

Change by Joseph Gordon :


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[issue39320] Handle unpacking of */** arguments and rvalues in the compiler

[Brandt Bucher]

Change by Brandt Bucher :


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[issue39320] Handle unpacking of */** arguments and rvalues in the compiler

[Brandt Bucher]

Change by Brandt Bucher :


--
pull_requests: +17623
pull_request: https://github.com/python/cpython/pull/18243

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[issue14019] Unify tests for str.format and string.Formatter

[Joseph Gordon]

Change by Joseph Gordon :


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[issue39401] [CVE-2020-8315] Unsafe dll loading in getpathp.c on Win7

[Steve Dower]

Steve Dower  added the comment:


New changeset 6a65eba44bfd82ccc8bed4b5c6dd6637549955d5 by Steve Dower in branch 
'master':
bpo-39401: Avoid unsafe DLL load on Windows 7 and earlier (GH-18231)
https://github.com/python/cpython/commit/6a65eba44bfd82ccc8bed4b5c6dd6637549955d5


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[issue39479] [RFE] Add math.lcm() function: Least Common Multiple

[Vedran Čačić]

Vedran Čačić  added the comment:

I agree with Raymond that it's really seldom needed. However, I'd like to point 
out that the "trivial" implementation might not be so trivial after all: as 
Steven said, it mishandles (0,0) case. And even Tim fell into that trap, so it 
can't be said it's easily avoided. I agree that this case doesn't really appear 
in "real world" tasks, but that's not really an excuse: imagine a factorial 
that didn't work for 0.

Also, a bit more often used case: seeing the code for lcm of 2 arguments, 
people might (and do; I've seen it) generalize to 3 or more arguments in a way 
that seems logical and is often correct, but not always (a*b*c//gcd(a,b,c)).

And one more tidbit: the usual formula for lcm doesn't really work for the case 
of fraction inputs. I know that currently math.gcd doesn't handle fractions, 
but it could. It's imaginable that that feature will some day be added (just 
like pow recently started supporting modular inverses), and then suddenly lcd 
implementations will silently give the wrong result for fractions.

A smart man;-) once said that the main criteria for inclusion in stdlib is that 
the function is often needed by users, _and_ it's often implemented wrong. I 
think lcm doesn't really satisfy the first criterion, but it does satisfy the 
second.

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[issue39401] [CVE-2020-8315] Unsafe dll loading in getpathp.c on Win7

[Steve Dower]

Steve Dower  added the comment:

This is now assigned CVE-2020-8315 
(https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8315 
https://nvd.nist.gov/vuln/detail/CVE-2020-8315)

Thanks Anthony for the report! I included your name as the reporter, though I 
don't see it on any of the pages.

--
title: Unsafe dll loading in getpathp.c on Win7 -> [CVE-2020-8315] Unsafe dll 
loading in getpathp.c on Win7

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[David Edelsohn]

David Edelsohn  added the comment:

In utime_stat_localtime.py, "os.stat (sec)" is the result of os.utime.
In utime_stat_localtime2.py "os.stat (sec int)" is the result of os.stat.

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[David Edelsohn]

David Edelsohn  added the comment:

[dje@rawhide ~]$ touch testfn
[dje@rawhide ~]$ python3 -c 'import os; os.utime("testfn", (4386268800, 
4386268800))'
[dje@rawhide ~]$ stat testfn
  File: testfn
  Size: 0   Blocks: 0  IO Block: 4096   regular empty file
Device: fd00h/64768dInode: 17887487Links: 1
Access: (0664/-rw-rw-r--)  Uid: ( 1001/ dje)   Gid: ( 1001/ dje)
Context: unconfined_u:object_r:user_home_t:s0
Access: 2038-01-18 22:14:07.0 -0500
Modify: 2038-01-18 22:14:07.0 -0500
Change: 2020-01-28 21:19:14.707112199 -0500
 Birth: 2020-01-28 21:19:01.627112199 -0500
[dje@rawhide ~]$ python3 -c 'import os; st=os.stat("testfn"); print(st); 
print(tuple(st)); print(st.st_mtime_ns)'
os.stat_result(st_mode=33204, st_ino=17887487, st_dev=64768, st_nlink=1, 
st_uid=1001, st_gid=1001, st_size=0, st_atime=2147483647, st_mtime=2147483647, 
st_ctime=1580264354)
(33204, 17887487, 64768, 1, 1001, 1001, 0, 2147483647, 2147483647, 1580264354)
21474836470

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[STINNER Victor]

STINNER Victor  added the comment:

"""
$ ./python utime_stat_localtime2.py 
os.utime (sec): 4386268800
os.stat (sec int): 2147483647
os.stat (sec float): 2147483647.0
os.stat (ns): 21474836470
"""

It doesn't make sense !? In msg360916, you had:

os.stat (sec): 4386268800 <= os.stat().st_mtime
os.stat (ns): 21474836470 <= os.stat().st_mtime._ns

How is it possible that sometimes st_mtime is right, and sometimes st_mtime is 
so plain wrong?

--

Test setting mtime in Python, reading mtime using /usr/bin/stat, then reading 
file stat in Python:

$ touch testfn

$ python3 -c 'import os; os.utime("testfn", (4386268800, 4386268800))'

$ stat testfn 
(...)
Modify: 2108-12-30 01:00:00.0 +0100
(...)

$ python3 -c 'import os; st=os.stat("testfn"); print(st); print(tuple(st)); 
print(st.st_mtime_ns)'

os.stat_result(st_mode=33204, st_ino=24648296, st_dev=40, st_nlink=1, 
st_uid=1000, st_gid=1000, st_size=0, st_atime=4386268800, st_mtime=4386268800, 
st_ctime=1580263179)
(33204, 24648296, 40, 1, 1000, 1000, 0, 4386268800, 4386268800, 1580263179)
43862688000

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Ethan Furman]

Ethan Furman  added the comment:

Well, I would prefer if Path objects were seamless to use since at one time 
they were actually strings, but I can live with Brett's rationale that they are 
only seamless where paths are explicitly expected.

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[David Edelsohn]

David Edelsohn  added the comment:

Not -O3, but it's calling PyLong_FromLongLong on s390x as well

   0x011ca524 <+28>:brasl   %r14,0x10649b0 

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[STINNER Victor]

STINNER Victor  added the comment:

I understand that os.fsencode() was modified to support the fspath protocol to 
be consistent with the C implementation PyUnicode_FSConverter() which calls 
PyOS_FSPath().

I agree that at least in C, we need two functions: one which accepts (str, 
bytes), another which also supports the fspath protocol.

IMHO PyUnicode_FSConverter() was modified to support fspath because it was 
convenient to only modify one function. But this change wasn't designed to 
decide in each function if fspath should be accepted or not.

For me, os.putenv() should not accept fspath neither.

This issue is not specific to os.environ. It's more general about the PEP 519 
implementation. IMHO the implementation should be "adjusted".

I like the deprecation idea ;-) We did something similar with functions 
accepting float by mistake. First a deprecation warning was emited, and then it 
became a hard error (exception).

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[David Edelsohn]

David Edelsohn  added the comment:

$ ./python utime_stat_localtime2.py 
os.utime (sec): 4386268800
os.stat (sec int): 2147483647
os.stat (sec float): 2147483647.0
os.stat (ns): 21474836470

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[STINNER Victor]

Change by STINNER Victor :


--
title: test_zipfile: test_add_file_after_2107() sometimes fails on Fedora 
Rawhide 3.x: time.localtime() limited to year 2038 -> test_zipfile: 
test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x: time.localtime() limited to year 2038

[STINNER Victor]

STINNER Victor  added the comment:

David Edelsohn:

> Output on s390x Fedora Rawhide:
> (...)
> os.stat (sec): 4386268800
> os.stat (ns): 21474836470

Oh wait, ns != sec * 10**9 here. "2147483647" is 2**31-1 (INT_MAX).

It looks like a bug in fill_time() of Modules/posixmodule.c. I suspect a bug in 
_PyLong_FromTime_t().

On this buildbot worker, we have:

checking size of long long... 8
checking size of time_t... 8

So _PyLong_FromTime_t() should be implemented as:

return PyLong_FromLongLong((long long)t);

_PyLong_FromTime_t() raw value is exported in os.stat() as os.stat(filename)[8].

Attached utime_stat_localtime2.py exposes it:

vstinner@apu$ ./python utime_stat_localtime2.py 
os.utime (sec): 4386268800
os.stat (sec int): 4386268800
os.stat (sec float): 4386268800.0
os.stat (ns): 43862688000

On Fedora 31 x86-64 with GCC 9.2.1, gcc -O3, _PyLong_FromTime_t() really just 
calls PyLong_FromLongLong():

(gdb) disassemble _PyLong_FromTime_t
Dump of assembler code for function _PyLong_FromTime_t:
   0x00521f30 <+0>: jmp0x457800 

--
Added file: https://bugs.python.org/file48870/utime_stat_localtime2.py

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x: time.localtime() limited to year 2038

[David Edelsohn]

David Edelsohn  added the comment:

$ ./python
Python 3.9.0a3+ (heads/master:aabdeb766b, Jan 28 2020, 13:50:48) 
[GCC 10.0.1 20200121 (Red Hat 10.0.1-0.4)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> time.localtime(2**31)
time.struct_time(tm_year=2038, tm_mon=1, tm_mday=18, tm_hour=22, tm_min=14, 
tm_sec=8, tm_wday=0, tm_yday=18, tm_isdst=0)
>>> time.localtime(2**31-3600*24)
time.struct_time(tm_year=2038, tm_mon=1, tm_mday=17, tm_hour=22, tm_min=14, 
tm_sec=8, tm_wday=6, tm_yday=17, tm_isdst=0)
>>> time.localtime(2**32)
time.struct_time(tm_year=2106, tm_mon=2, tm_mday=7, tm_hour=1, tm_min=28, 
tm_sec=16, tm_wday=6, tm_yday=38, tm_isdst=0)
>>> time.localtime(2**33)
time.struct_time(tm_year=2242, tm_mon=3, tm_mday=16, tm_hour=8, tm_min=56, 
tm_sec=32, tm_wday=2, tm_yday=75, tm_isdst=1)

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x: time.localtime() limited to year 2038

[STINNER Victor]

STINNER Victor  added the comment:

Notes on the glibc:

* localtime() calls __tz_convert()
* localtime() and __tz_convert() have been modified recently to support 64-bit 
timestamp
* __tz_convert() is implemented in time/tzset.c
* localtime() is implemented in time/localtime.c

--
title: test_zipfile: test_add_file_after_2107() sometimes fails on Fedora 
Rawhide 3.x -> test_zipfile: test_add_file_after_2107() sometimes fails on 
Fedora Rawhide 3.x: time.localtime() limited to year 2038

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[issue15600] expose the finder details used by the FileFinder path hook

[Brett Cannon]

Brett Cannon  added the comment:

Since Eric never replied I'm just closing this.

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[issue14019] Unify tests for str.format and string.Formatter

[Brett Cannon]

Change by Brett Cannon :


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[issue14067] Avoid more stat() calls in importlib

[Brett Cannon]

Change by Brett Cannon :


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[issue14604] spurious stat() calls in importlib

[Brett Cannon]

Change by Brett Cannon :


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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[STINNER Victor]

STINNER Victor  added the comment:

> s390x Fedora Rawhide 3.x:
> https://buildbot.python.org/all/#/builders/323/builds/6

I also checked the configure: time_t size is 64-bit on this system, so it 
should not be impacted on the glibc/Linux kernel work on the year 2038 bug.

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[STINNER Victor]

STINNER Victor  added the comment:

I don't see anything about localtime() or the year 2038 bug in glibc 2.30 
release notes:
https://lwn.net/Articles/795127/

I'm aware of work in the Linux kernel and glibc for the year 2038 bug, but for 
32-bit systems:
https://lwn.net/Articles/776435/

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[issue14678] Update zipimport to support importlib.invalidate_caches()

[Brett Cannon]

Change by Brett Cannon :


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keywords: +easy

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[issue14715] test.support.DirsOnSysPath should be replaced by importlib.test.util.import_state

[Brett Cannon]

Brett Cannon  added the comment:

Do we still care about this, Eric?

--
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[issue15693] expose glossary link on hover

[Brett Cannon]

Change by Brett Cannon :


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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[STINNER Victor]

STINNER Victor  added the comment:

> os.stat (sec): 4386268800
> ...
> localtime: (2038, 1, 18, 22, 14, 7)

Aha, localtime() behavior changed for timestamp larger than 2**31. What is the 
version of the glibc package?

> s390x Fedora Rawhide 3.x:
> https://buildbot.python.org/all/#/builders/323/builds/6

pythoninfo of this build says:

platform.libc_ver: glibc 2.30.9000

(Same in the latest build, build 25.)

--

On AMD64 Fedora Rawhide 3.x with glibc-2.30.9000-31.fc32.x86_64, I get years 
after 2038:

vstinner@python-builder-rawhide$ ./python
Python 3.9.0a3+ (heads/master:0cd5bff6b7, Jan 28 2020, 19:39:07) 
[GCC 10.0.1 20200123 (Red Hat 10.0.1-0.5)] on linux
Type "help", "copyright", "credits" or "license" for more information.

>>> import time
>>> time.localtime(2**31)
time.struct_time(tm_year=2038, tm_mon=1, tm_mday=18, tm_hour=22, tm_min=14, 
tm_sec=8, tm_wday=0, tm_yday=18, tm_isdst=0)

>>> time.localtime(2**31-3600*24)
time.struct_time(tm_year=2038, tm_mon=1, tm_mday=17, tm_hour=22, tm_min=14, 
tm_sec=8, tm_wday=6, tm_yday=17, tm_isdst=0)

>>> time.localtime(2**32)
time.struct_time(tm_year=2106, tm_mon=2, tm_mday=7, tm_hour=1, tm_min=28, 
tm_sec=16, tm_wday=6, tm_yday=38, tm_isdst=0)

>>> time.localtime(2**33)
time.struct_time(tm_year=2242, tm_mon=3, tm_mday=16, tm_hour=8, tm_min=56, 
tm_sec=32, tm_wday=2, tm_yday=75, tm_isdst=1)

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[issue15867] make importlib documentation easier to use

[Brett Cannon]

Change by Brett Cannon :


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[issue15911] can't step through _frozen_importlib/importlib._bootstrap using pdb

[Brett Cannon]

Change by Brett Cannon :


--
versions: +Python 3.9 -Python 3.4

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[issue15911] can't step through _frozen_importlib/importlib._bootstrap using pdb

[Brett Cannon]

Change by Brett Cannon :


--
title: can't step through _frozen_importlib/importlib._bootstrap using gdb -> 
can't step through _frozen_importlib/importlib._bootstrap using pdb

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[issue15987] Provide a way to compare AST nodes for equality recursively

[Brett Cannon]

Change by Brett Cannon :


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[issue16101] Verify all imported modules at startup are needed

[Brett Cannon]

Change by Brett Cannon :


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[issue16392] import crashes on circular imports in ext modules

[Brett Cannon]

Change by Brett Cannon :


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[issue16217] Tracebacks are unnecessarily verbose when using 'python -m'

[Brett Cannon]

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[issue16651] Find out what stdlib modules lack a pure Python implementation

[Brett Cannon]

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[issue16721] configure incorrectly adds -OPT:Olimit=0 for clang

[Brett Cannon]

Change by Brett Cannon :


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[issue16737] Different behaviours in script run directly and via runpy.run_module

[Brett Cannon]

Change by Brett Cannon :


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[issue16748] Make CPython test package discoverable

[Brett Cannon]

Change by Brett Cannon :


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[issue16826] Don't check for PYTHONCASEOK if interpreter started with -E

[Brett Cannon]

Brett Cannon  added the comment:

This is still occurring. Probably need to add `and sys.ignore_environment` to 
https://github.com/python/cpython/blob/0cd5bff6b7da3118d0c5a88fc2b80f80eb7c3059/Lib/importlib/_bootstrap_external.py#L38.

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[David Edelsohn]

David Edelsohn  added the comment:

Output on s390x Fedora Rawhide:
$ ./python utime_stat_localtime.py 
os.utime (sec): 4386268800
os.stat (sec): 4386268800
os.stat (ns): 21474836470
stat==utime? False
localtime: (2038, 1, 18, 22, 14, 7)

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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[STINNER Victor]

STINNER Victor  added the comment:

I suspect that the timestamp set by os.utime() is not the one seen by 
os.stat(). Or maybe time.localtime() behavior changed.

Try attached utime_stat_localtime.py script.

Output on Fedora 31 in my home directory which uses btrfs:

$ python3.7 utime_stat_localtime.py 
os.utime (sec): 4386268800
os.stat (sec): 4386268800
os.stat (ns): 43862688000
stat==utime? True
localtime: (2108, 12, 30, 1, 0, 0)

--
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[issue39460] test_zipfile: test_add_file_after_2107() sometimes fails on Fedora Rawhide 3.x

[Miro Hrončok]

Miro Hrončok  added the comment:

I think this happens "randomly" regardless of the architecture. I've seen it on 
x86_64 as well.

--
title: test_zipfile: test_add_file_after_2107() fails on s390x Fedora Rawhide 
3.x -> test_zipfile: test_add_file_after_2107() sometimes fails on Fedora 
Rawhide 3.x

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[issue16027] pkgutil doesn't support frozen modules

[Brett Cannon]

Change by Brett Cannon :


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[issue14787] pkgutil.walk_packages returns extra modules

[Brett Cannon]

Change by Brett Cannon :


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[issue39460] test_zipfile: test_add_file_after_2107() fails on s390x Fedora Rawhide 3.x

[David Edelsohn]

David Edelsohn  added the comment:

Do you believe that a single GCC 10 issue is affecting PPC64LE, ARM, and s390x, 
but expressed in different manners on the different architectures OR is the 
PPC64LE issue separate and architecture-depdendent?

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[issue39460] test_zipfile: test_add_file_after_2107() fails on s390x Fedora Rawhide 3.x

[STINNER Victor]

STINNER Victor  added the comment:

Fedora downstream issue: https://bugzilla.redhat.com/show_bug.cgi?id=1795576

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[issue34095] [2.7] Seg fault on archlinux 32 when run tests with xvfb-run

[Benjamin Peterson]

Benjamin Peterson  added the comment:

2.7 is dead.

--
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resolution:  -> wont fix
stage:  -> resolved
status: open -> closed

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[issue39480] referendum reference is needlessly annoying

[Raymond Hettinger]

Raymond Hettinger  added the comment:

I concur with Steven.  The association with Brexit is specious and the CoC 
wasn't intended to apply to second guessing technical examples.

--
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nosy: +rhettinger, willingc
priority: normal -> low

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[issue39469] Support for relative home path in pyvenv.cfg

[Jeff Edwards]

Jeff Edwards  added the comment:

Interesting, I hadn’t realized that it would embed the FQ Executable path,
but that does make sense overall.  I guess I had always planned on fixing
the ‘bin’ directory anyway afterwards, it’s just that the lack of relative
home made it significantly harder to encapsulate multiple environments
running with the same interpreter without having to do a complete
reinstall, and venv did seem like the best and most-pythonic way to do it.

I’ll think about it a bit more

On Tue, Jan 28, 2020 at 2:33 PM Eryk Sun  wrote:

>
> Eryk Sun  added the comment:
>
> > Suffice to say, is there a significant reason to not allow it?
>
> It's poorly supported by packaging. In particular, relocating an
> environment isn't supported with entry-point scripts, which pip installs
> with a fully-qualified shebang. Moreover, entry-point scripts in Windows
> are created as exe files (e.g. "pip.exe") that embed the fully-qualified
> path of python[w].exe in the environment, plus a zipped __main__.py. For
> example, given an environment at "C:\Temp\env", running
> "C:\Temp\env\Scripts\pip.exe" in turn spawns a child process with the
> command line: "C:\Temp\env\Scripts\python.exe"
> "C:\Temp\env\Scripts\pip.exe". This breaks if the environment is renamed or
> relocated.
>
> --
> nosy: +eryksun
>
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[issue39469] Support for relative home path in pyvenv.cfg

[Eryk Sun]

Eryk Sun  added the comment:

> Suffice to say, is there a significant reason to not allow it?

It's poorly supported by packaging. In particular, relocating an environment 
isn't supported with entry-point scripts, which pip installs with a 
fully-qualified shebang. Moreover, entry-point scripts in Windows are created 
as exe files (e.g. "pip.exe") that embed the fully-qualified path of 
python[w].exe in the environment, plus a zipped __main__.py. For example, given 
an environment at "C:\Temp\env", running "C:\Temp\env\Scripts\pip.exe" in turn 
spawns a child process with the command line: "C:\Temp\env\Scripts\python.exe" 
"C:\Temp\env\Scripts\pip.exe". This breaks if the environment is renamed or 
relocated.

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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[Dino Viehland]

Dino Viehland  added the comment:

I guess the update to lib.pyproj probably just makes the files show up when 
opening the solution in Visual Studio then.

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[issue39480] referendum reference is needlessly annoying

[Steven D'Aprano]

Steven D'Aprano  added the comment:

Oh come on now, this is such a trivialisation of the CoC that I cannot believe 
that it is a good-faith bug report and not a troll. I'm surprised you didn't 
toss in the words "triggered" and "micro-aggression" while you're at it.

The example has nothing to do with the UK Referendum (or for that matter, the 
2016 referendums in Zambia, Columbia, Bolivia, or Italy): the numbers are 
completely different, the results and percentages are different, and there is 
no non-arbitrary way to map Yes/No of a made up example to either Leave/Remain 
or any other actual results. If you want to read the example as a better world 
where the majority of peole voted "No" to leaving the EU, then go ahead.

Why should you privilege the Brexit referendum over (let's say) the Irish 
referendum which voted in favour of allowing same-sex marriages? Or are you 
annoyed by that too?

Any year is going to "annoy" some fraction of the readers:

2019 is the year that the Liberal Party (don't be fooled by the name: they're 
the authoritarian-right, climate-change-denying reactionary-right party) won 
the Australian Federal election on a campaign of Facebook fake news, "annoying" 
almost half the country. It is also the year that President Trump was 
impeached, annoying half of the USA. 2018 was the year Vladimir Putin was 
re-elected president of Russia, annoying and *terrifying* some percentage of 
Russians. 2017 was the year that Trump was sworn in as US President. Shall we 
go on?

2016 was also the year that Taiwan saw the first ever majority by a non-KMT 
party, and the first female prime minister, when the Democratic Progressive 
Party won their elections.

By the way, the fact that I've just spent easily half an hour getting annoyed 
at this bug report and writing this response disproves your claim about 
avoiding making others upset.

--
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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Raymond Hettinger]

Raymond Hettinger  added the comment:

I don't think proposal this makes sense.  os.environ is a dict-like object 
providing clean access to the environment variables.  Use of Paths is an 
orthogonal problem unrelated to environment variables.

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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[STINNER Victor]

STINNER Victor  added the comment:

The Windows installer copies Lib/test/ and subdirectories: see  in Tools/msi/test/test.wixproj.

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[issue37860] Add netlify deploy preview for docs

[Ernest W. Durbin III]

Change by Ernest W. Durbin III :


--
pull_requests: +17622
pull_request: https://github.com/python/cpython/pull/18242

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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[Dino Viehland]

Dino Viehland  added the comment:


New changeset 0cd5bff6b7da3118d0c5a88fc2b80f80eb7c3059 by Dino Viehland in 
branch 'master':
bpo-39459: include missing test files in windows installer 
https://github.com/python/cpython/commit/0cd5bff6b7da3118d0c5a88fc2b80f80eb7c3059


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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[Dino Viehland]

Dino Viehland  added the comment:

Nope, thank you for pointing that out.  I've updated them now with PR 18241

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Eryk Sun]

Eryk Sun  added the comment:

> as long as the behavior is *consistent* with the env kwarg to 
> subprocess.run() 

subprocess isn't consistent with itself across platforms. The env parameter in 
Windows is strictly an str->str mapping, like os.environ. This is coded in 
getenvironment in Modules/_winapi.c:

if (! PyUnicode_Check(key) || ! PyUnicode_Check(value)) {
PyErr_SetString(PyExc_TypeError,
"environment can only contain strings");
goto error;
}

At a lower level, should the env parameter of os.spawnve and os.execve  allow 
path-like objects? Should (Unix) os.putenv allow the name and value to be 
path-like?

Currently these cases use PyUnicode_FSConverter and PyUnicode_FSDecoder, which 
support __fspath__ via PyOS_FSPath. PyUnicode_FSDecoder also supports the 
buffer protocol, with a warning. 

Since we have cases like this where the filesystem encoding is used for string 
data that's not actually a file path, should alternate ParseTuple converters be 
added that are limited to just str and bytes? Maybe name them 
PyUnicode_FSStringEncoder and PyUnicode_FSStringDecoder, where "String" 
emphasizes that fspath and buffer objects are not allowed. For example:

int
PyUnicode_FSStringEncoder(PyObject *path, void *addr)
{
PyObject *output = NULL;

if (path == NULL) {
Py_DECREF(*(PyObject **)addr);
*(PyObject **)addr = NULL;
return 1;
}

if (PyBytes_Check(path)) {
output = path;
Py_INCREF(output);
}
else if (PyUnicode_Check(path)) {
output = PyUnicode_EncodeFSDefault(path);
if (!output)
return 0;
}
else {
PyErr_Format(PyExc_TypeError, "path should be str or bytes, not "
"%.200s", _PyType_Name(Py_TYPE(path)));
return 0;
}

if ((size_t)PyBytes_GET_SIZE(output) !=
strlen(PyBytes_AS_STRING(output)))
{
PyErr_SetString(PyExc_ValueError, "embedded null byte");
Py_DECREF(output);
return 0;
}

*(PyObject **)addr = output;
return Py_CLEANUP_SUPPORTED;
}


int
PyUnicode_FSStringDecoder(PyObject *path, void *addr)
{
PyObject *output = NULL;

if (arg == NULL) {
Py_DECREF(*(PyObject **)addr);
*(PyObject **)addr = NULL;
return 1;
}

if (PyUnicode_Check(path)) {
output = path;
Py_INCREF(output);
}
else if (PyBytes_Check(path)) {
output = PyUnicode_DecodeFSDefaultAndSize(PyBytes_AS_STRING(path),
PyBytes_GET_SIZE(path));
if (!output)
return 0;
}
else {
PyErr_Format(PyExc_TypeError, "path should be str or bytes, not "
"%.200s", _PyType_Name(Py_TYPE(path)));
return 0;
}

if (PyUnicode_READY(output) == -1) {
Py_DECREF(output);
return 0;
}

if (findchar(PyUnicode_DATA(output), PyUnicode_KIND(output),
 PyUnicode_GET_LENGTH(output), 0, 1) >= 0) {
PyErr_SetString(PyExc_ValueError, "embedded null character");
Py_DECREF(output);
return 0;
}

*(PyObject **)addr = output;
return Py_CLEANUP_SUPPORTED;
}

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[issue39479] [RFE] Add math.lcm() function: Least Common Multiple

[Raymond Hettinger]

Raymond Hettinger  added the comment:

-1 Given that we had gcd(), I don't see any value to adding *lcm()* as well. 
 
Once you have gcd(), getting the least common multiple is trivial.

Also, it is rare to ever need a lcm() function.  I don't think I've ever seen 
it in real code.

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[issue39476] Not convinced with the dynamic data type assignment

[Terry J. Reedy]

Terry J. Reedy  added the comment:

Sushma, asking about the exception message on python-list was the right thing 
to do.  You should have waited for the answers you got there.  At this point, 
bugs in basic python operations are extremely rare.

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[issue38980] Compile libpython with -fno-semantic-interposition

[David Filiatrault]

Change by David Filiatrault :


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[issue25702] Link Time Optimizations support for GCC and CLANG

[David Filiatrault]

Change by David Filiatrault :


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[issue39479] [RFE] Add math.lcm() function: Least Common Multiple

[Ananthakrishnan A S]

Ananthakrishnan A S  added the comment:

some problems that needs lcm function:

1:find the least number which when divided by 'a','b','c','d' leaves remainder 
'e' in each case.

2:person A exercises every 'n' days and person B every 'm' days. A and B both 
exercised today. How many days will it be until they exercise together again?

3:The LCM is important when adding fractions which have different denominators



we have to use the lcm function when,

1) an event that is or will be repeating over and over.
2) To purchase or get multiple items in order to have enough.
3) To figure out when something will happen again at the same time.

All these shows lcm function should be included in the math library.

So can i proceed with adding pull request to add lcm function in python's math 
module.

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[issue39460] test_zipfile: test_add_file_after_2107() fails on s390x Fedora Rawhide 3.x

[David Edelsohn]

David Edelsohn  added the comment:

Sorry, posted the wrong output above.

$ ./python -m test test_zipfile
0:00:00 load avg: 0.01 Run tests sequentially
0:00:00 load avg: 0.01 [1/1] test_zipfile
test test_zipfile failed -- Traceback (most recent call last):
  File "/home/dje/src/cpython/Lib/test/test_zipfile.py", line 620, in 
test_add_file_after_2107
self.assertRaises(struct.error, zipfp.write, TESTFN)
AssertionError: error not raised by write

test_zipfile failed in 55.6 sec

== Tests result: FAILURE ==

1 test failed:
test_zipfile

Total duration: 55.6 sec
Tests result: FAILURE

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[issue39460] test_zipfile: test_add_file_after_2107() fails on s390x Fedora Rawhide 3.x

[David Edelsohn]

David Edelsohn  added the comment:

$ ./python -m test tet_zipfile
0:00:00 load avg: 0.03 Run tests sequentially
0:00:00 load avg: 0.03 [1/1] tet_zipfile
test tet_zipfile crashed -- Traceback (most recent call last):
  File "/home/dje/src/cpython/Lib/test/libregrtest/runtest.py", line 270, in 
_runtest_inner
refleak = _runtest_inner2(ns, test_name)
  File "/home/dje/src/cpython/Lib/test/libregrtest/runtest.py", line 221, in 
_runtest_inner2
the_module = importlib.import_module(abstest)
  File "/home/dje/src/cpython/Lib/importlib/__init__.py", line 127, in 
import_module
return _bootstrap._gcd_import(name[level:], package, level)
  File "", line 1021, in _gcd_import
  File "", line 998, in _find_and_load
  File "", line 975, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'test.tet_zipfile'

tet_zipfile failed

== Tests result: FAILURE ==

1 test failed:
tet_zipfile

Total duration: 76 ms
Tests result: FAILURE

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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[Dino Viehland]

Change by Dino Viehland :


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pull_request: https://github.com/python/cpython/pull/18241

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[issue39479] [RFE] Add math.lcm() function: Least Common Multiple

[Vedran Čačić]

Vedran Čačić  added the comment:

I must say that the problem (with two classes divided into teams) seems to me 
to be exactly one that can be solved with gcd, and lcm itself is mostly useless 
for it.

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Antony Lee]

Antony Lee  added the comment:

FWIW, I'm actually fine with not supporting Path objects in os.environ, as long 
as the behavior is *consistent* with the env kwarg to subprocess.run() -- note 
that the original title of the thread only pointed out to the inconsistency, 
and did not strongly request that os.environ support Paths.

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[issue39469] Support for relative home path in pyvenv.cfg

[Brett Cannon]

Brett Cannon  added the comment:

> Suffice to say, is there a significant reason to not allow it?

We have to support that use-case forever. ;) In all seriousness, relative paths 
get tricky when you forget to resolve the path as appropriate (and in a way 
that people expect) and it requires making sure that this will work for the 
next 30 years, so it's not a small thing to take on.

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[issue39460] test_zipfile: test_add_file_after_2107() fails on s390x Fedora Rawhide 3.x

[STINNER Victor]

STINNER Victor  added the comment:

> Is currently anybody actively working on this? Please, report what you have 
> found out, if so. I'd like to start digging into this tomorrow and possibly 
> avoid any duplicit work.

I tried but failed to reproduce the bug on Fedora 31 and Fedora Rawhide.

I tested 3.8 and master development branches on Fedora 31 x86-64 laptop: 
"./configure --with-pydebug CFLAGS=-O0 && make && ./python -m test -v 
test_zipfile" pass.

I tested Python 3.9.0a3 on my up-to-date Fedora Rawhide x86-64 VM: "./configure 
--with-pydebug CFLAGS=-O0 && make && ./python -m test -v test_zipfile" pass. I 
also tried to install Python in /opt/py39 and run tests using 
/opt/py39/bin/python3.9: the test still pass.

I also tested Python 3.9.0a3 on an up-to-date Fedora Rawhide ppc64 mock 
container: Python configured as the Fedora package does (LTO, PGO, CFLAGS, 
LDFLAGS, etc.). test_zipfile pass as well.

Since I cannot reproduce the issue, nor access a machine which the bug occurs, 
I don't know how to debug this issue.

Can I get access to "s390x Fedora Rawhide 3.x" buildbot worker?

I didn't try to rebuild Python using the Fedora specfile. I only built Python 
manually.

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[issue39459] test_import: test_unwritable_module() fails on AMD64 Fedora Stable Clang Installed 3.x

[Brett Cannon]

Brett Cannon  added the comment:

Did the Windows-equivalent project files also get updated?

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[issue39461] [RFE] os.environ should support Path-like values, like subprocess(..., env=...)

[Brett Cannon]

Brett Cannon  added the comment:

> but now it's too change to change it again :-)

I actually don't think it is if we want to revert this. We can raise a 
deprecation warning if the call to os.fsencode() leads to a value different 
than its argument and say that people are expected to handle conversions 
themselves.

> The idea behind PEP 519 was to alleviate str(path_obj) calls between the 
> os/program interface

... where file paths were explicitly expected. os.environ is not a place where 
file paths are explicitly expected, just a place where they _might_ end up. 
Basically I only consider PEP 519 valid in places where file paths are the only 
thing that are expected (e.g. all the path manipulation functions in os.path). 
Everywhere else where paths are only a "maybe" I would say it shouldn't be 
relied upon to do implicit conversions.

> Out of curiosity, any idea how often non-strings are used to set os.environ, 
> and so need explicit conversion?

I have anecdotal evidence from outside of Python that people will do this when 
they can and then are surprised when the conversion doesn't work the way they 
expect (e.g. floats).

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[issue39479] [RFE] Add math.lcm() function: Least Common Multiple

[Ananthakrishnan A S]

Ananthakrishnan A S  added the comment:

Should i proceed with adding a pull request for adding a 'lcm' function in 
python's math module.

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[issue39468] .python_history write permission improvements

[Eryk Sun]

Eryk Sun  added the comment:

This issue is due to a bug in GNU Readline (actually GNU History). It's 
documented that write_history [1] returns an errno value. But the internal 
history_do_write [2] function in this case returns the value from a rename() 
system call, via the value from histfile_restore [3]. rename() returns -1 on 
failure, which is being mishandled here as an errno value.

Actually, write permission to the original history file isn't required. GNU 
History writes to a temp file and then replaces the original via rename(). 
Normally this just requires write access to the directory. But if the directory 
or target file has the immutable file attribute set, then rename() fails with 
errno set to EPERM (at least in Linux; maybe it's a different error in BSD or 
macOS).

If not for the GNU History bug, this failed call would raise a PermissionError, 
which is already handled. Maybe it could also write an error message to stderr 
that write_history failed. For example:

def write_history():
try:
readline.write_history_file(history)
except OSError as e:
# bpo-19891: home directory does not exist or is not
# writable
if not (isinstance(e, (FileNotFoundError, PermissionError))
# bpo-39468: GNU History may return -1 as an errno value
or e.errno == -1):
raise
print('write_history failed: {!r}'.format(history),
file=sys.stderr)

I agree with Steven that the handler should not presume to modify file 
permissions or attributes.

[1] https://tiswww.case.edu/php/chet/readline/history.html#IDX29
[2] http://git.savannah.gnu.org/cgit/readline.git/tree/histfile.c#n630
[3] http://git.savannah.gnu.org/cgit/readline.git/tree/histfile.c#n458

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[issue39469] Support for relative home path in pyvenv.cfg

[Jeff Edwards]

Jeff Edwards  added the comment:

I would say they’re not designed to be, but the also aren’t designed to not
be portable.  This is often useful where open network access isn’t
reasonable, so access to Pip/pipx/pipenv is limited at best.

Suffice to say, is there a significant reason to not allow it?

On Tue, Jan 28, 2020 at 10:28 AM Brett Cannon 
wrote:

>
> Brett Cannon  added the comment:
>
> Do note that virtual environments are not designed to be portable in
> general, so this would be a fundamental change in the design and purpose of
> virtual environments.
>
> --
> nosy: +brett.cannon, vinay.sajip
>
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[issue39469] Support for relative home path in pyvenv.cfg

[Brett Cannon]

Brett Cannon  added the comment:

Do note that virtual environments are not designed to be portable in general, 
so this would be a fundamental change in the design and purpose of virtual 
environments.

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[issue39480] referendum reference is needlessly annoying

[Fred Drake]

Change by Fred Drake :


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[issue39401] Unsafe dll loading in getpathp.c on Win7

[STINNER Victor]

Change by STINNER Victor :


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[issue39481] Implement PEP 585 (Type Hinting Generics In Standard Collections)

[Guido van Rossum]

Change by Guido van Rossum :


--
keywords: +patch
pull_requests: +17620
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/18239

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[issue39480] referendum reference is needlessly annoying

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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[issue39481] Implement PEP 585 (Type Hinting Generics In Standard Collections)

[Guido van Rossum]

New submission from Guido van Rossum :

See PEP 585, which is still under review and may change in response to this 
work.

https://www.python.org/dev/peps/pep-0585/

--
components: Interpreter Core
messages: 360885
nosy: gvanrossum
priority: normal
severity: normal
status: open
title: Implement PEP 585 (Type Hinting Generics In Standard Collections)
type: behavior
versions: Python 3.9

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[issue39440] Use PyNumber_InPlaceAdd in sum() for the second iteration onward

[Brandt Bucher]

Brandt Bucher  added the comment:

Perhaps. I've opened a PR to update the comment with more info.

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[issue39440] Use PyNumber_InPlaceAdd in sum() for the second iteration onward

[Brandt Bucher]

Change by Brandt Bucher :


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pull_request: https://github.com/python/cpython/pull/18240

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[issue39480] referendum reference is needlessly annoying

[Ian Jackson]

New submission from Ian Jackson :

The section "Fancier Output Formatting" has the example below.  This will 
remind many UK readers of the 2016 EU referendum.  About half of those readers 
will be quite annoyed.

This annoyance seems entirely avoidable; a different example which did not 
refer to politics would demonstrate the behaviour just as well.

Changing this example would (in the words of the CoC) also show more empathy, 
and be more considerate towards, python contributors unhappy with recent 
political developments in the UK, without having to make anyone else upset in 
turn.

  >>> year = 2016
  >>> event = 'Referendum'
  >>> f'Results of the {year} {event}'
  'Results of the 2016 Referendum'

  >>> yes_votes = 42_572_654
  >>> no_votes = 43_132_495
  >>> percentage = yes_votes / (yes_votes + no_votes)
  >>> '{:-9} YES votes  {:2.2%}'.format(yes_votes, percentage)' 42572654 YES 
votes  49.67%'

--
assignee: docs@python
components: Documentation
messages: 360883
nosy: diziet, docs@python
priority: normal
severity: normal
status: open
title: referendum reference is needlessly annoying
versions: Python 3.7, Python 3.8, Python 3.9

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[issue39401] Unsafe dll loading in getpathp.c on Win7

[Eryk Sun]

Eryk Sun  added the comment:

> For clarity, I'm removing 3.9 from the affected versions. This version 
> does not support Windows 7, and only Windows 7 is vulnerable to this
> DLL hijack.

I added 3.9 for the related issue to switch to using a static import, since 
Windows 7 isn't supported in 3.9. But I guess that should have been made a 
separate issue, or added to the omnibus issue bpo-32592.

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[issue39460] test_zipfile: test_add_file_after_2107() fails on s390x Fedora Rawhide 3.x

[Marcel Plch]

Marcel Plch  added the comment:

Is currently anybody actively working on this? Please, report what you have 
found out, if so.
I'd like to start digging into this tomorrow and possibly avoid any duplicit 
work.

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[issue39479] [RFE] Add math.lcm() function: Least Common Multiple

[Ananthakrishnan A S]

Ananthakrishnan A S  added the comment:

I created this issue as i came across the following question:

There are n students in class A,and m students in class B.each class divides 
into teams for a competition.What is the biggest possible team size that can be 
divided,such that  each team has same number of members.

We can solve this type of problems easily if we have lcm() in math library.And 
there are lots of real life applications where we have to use lcm.

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[issue39479] [RFE] Add math.lcm() function: Least Common Multiple

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

reduce(gcd, [a, b, c, d, e])

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