[issue35213] IDLE: use 'macOS' where appropriate.

Stéphane Wirtel added the comment: @terry, I suppose you wanted to say "macOs" and not "maxOs" -- nosy: +matrixise ___ Python tracker ___ __

[issue35215] Replacing CPython memory allocation

New submission from paul : Hi all, I am trying to replace the version of malloc/free...etc with my own function suit. I am have issues with loading the initial library setup. I am looking for wisdom from the community as to why this may be the case. Facts: - i just grabbed the latest cpyth

[issue35215] Replacing CPython memory allocation

paul added the comment: I suspect that this _bootstrap library is not being loaded correctly, and i can only assume that this is somehow because of my memory suit, but i am not really sure where to start hunting, as there is a lot of code. My goal is just to replace malloc. If there is a be

[issue35203] Windows Installer Ignores Launcher Installer Options Where The Python Launcher Is Already Present

Dexter added the comment: Sadly due to the secure environment I'm unable to attach the log. The exact error is: "You must be an Administrator to remove this application. To remove this application you can log on as an Administrator, or contact your technical support group for assistance."

[issue35216] misleading error message from shutil.copy()

New submission from Cédric Van Rompay : When calling `shutil.copy('file.txt', 'not_here/')`, if directory `not_here/` does not exist, the raised error is: IsADirectoryError: [Errno 21] Is a directory: 'not_here/' If the intent of the user was to copy a file in a directory but the user forgo

[issue35217] REPL history is broken when python is invoked with cmd /c

New submission from 零欸特 : Windows 7 x64 Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:57:15) [MSC v.1915 64 bit (AMD64)] Steps to reproduce: 1. Create a script: ``` from subprocess import run run(["cmd.exe", "/c", "python"]) run(["python"]) run("python", shell=True)

[issue35216] misleading error message from shutil.copy()

Karthikeyan Singaravelan added the comment: Agreed this is confusing. Is this a Linux specific error? Trying this on Mac gives me a different error code and exception. # Mac $ ./python.exe Python 3.8.0a0 (heads/master:cd449806fa, Nov 12 2018, 09:51:24) [Clang 7.0.2 (clang-700.1.81)] on darwi

[issue35207] Disallow expressions like (a) = 42

Stefan Krah added the comment: I just want to add one more voice for allowing the status quo: C, OCaml, SML, Haskell allow the assignment, Ruby disallows it. The ML family must allow it, since "let (x) = 10" is pattern matching under the hood, and (10) = 10. In C (gcc, clang at least, I didn

[issue33695] Have shutil.copytree(), copy() and copystat() use cached scandir() stat()s

Giampaolo Rodola' added the comment: New changeset 19c46a4c96553b2a8390bf8a0e138f2b23e28ed6 by Giampaolo Rodola in branch 'master': bpo-33695 shutil.copytree() + os.scandir() cache (#7874) https://github.com/python/cpython/commit/19c46a4c96553b2a8390bf8a0e138f2b23e28ed6 --

[issue33695] Have shutil.copytree(), copy() and copystat() use cached scandir() stat()s

Change by Giampaolo Rodola' : -- assignee: -> giampaolo.rodola resolution: -> fixed stage: patch review -> resolved status: open -> closed ___ Python tracker ___

[issue35218] Impossible to round-trip decompress -> compress zipfiles with Python 3 due to losing flag_bits

New submission from keeely : Python 2.7 allows one to capture from one file a list of ZipInfo objects, and then recreate a new file using those ZipInfo objects. The same thing appears to be impossible with Python 3 without resorting to monkey-patches because of a line of code in the writestr

[issue35216] misleading error message from shutil.copy()

Stéphane Wirtel added the comment: You have the issue with the built-in 'open' function. -- nosy: +matrixise ___ Python tracker ___

[issue35216] misleading error message from shutil.copy()

Stéphane Wirtel added the comment: This error is specific to the C-API and not to Python, here is an example. #include #include #include #include #include int main(int argc, char **argv, char **environ) { int fd; fd = open("/tmp/toto/", O_CREAT); printf("file descriptor: %d\n

[issue35216] misleading error message from shutil.copy()

Stéphane Wirtel added the comment: @vstinner & @serhiy What do you think about this issue? For the same POSIX syscall (open) we get 2 different values for the error, 2 on macOS and EISDIR with Linux. Is a bug in Python or with the compliance of the operating system and the POSIX norm? Than

[issue35215] Replacing CPython memory allocation

Stéphane Wirtel added the comment: You have the issue with your functions, not with Python. Are you sure you do not have an issue with your code? -- nosy: +matrixise ___ Python tracker __

[issue35215] Replacing CPython memory allocation

Change by STINNER Victor : -- nosy: +vstinner ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.py

[issue32264] move pygetopt.h into internal/

Change by STINNER Victor : -- pull_requests: +9747 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://ma

[issue35177] Add missing dependencies between AST/parser header files

STINNER Victor added the comment: Oh, the Yield warning made its come back :-( Example: import.c c:\program files (x86)\windows kits\10\include\10.0.17134.0\um\winbase.h(102): warning C4005: 'Yield': macro redefinition [C:\projects\cpython\PCbuild\pythoncore.vcxproj] c:\projects\cpython\

[issue35081] Move internal headers to Include/internal/

STINNER Victor added the comment: New changeset 621cebe81b1e6c8de10425955bf532d31ee4df42 by Victor Stinner in branch 'master': bpo-35081: Rename internal headers (GH-10275) https://github.com/python/cpython/commit/621cebe81b1e6c8de10425955bf532d31ee4df42 --

[issue35207] Disallow expressions like (a) = 42

Guido van Rossum added the comment: Let's close this already. It won't happen. Sorry for the noise. -- ___ Python tracker ___ ___ P

[issue35213] IDLE: use 'macOS' where appropriate.

Terry J. Reedy added the comment: Whoops, 'macOS', as in the title and PR. -- stage: patch review -> needs patch ___ Python tracker ___ ___

[issue35213] IDLE: use 'macOS' where appropriate.

Stéphane Wirtel added the comment: ;-) just a joke. I have reviewed your PR, but do you count with the occurences of "OS X", it's the abbreviation of "MacOS X"? -- ___ Python tracker ___

[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

Dragoljub added the comment: @Vstinner, Any way you can help test out a config setting to avoid the locale changes on Python 2.7.0a4+? It is currently causing the isdigit() low-level function to call the local-specific function on windows and update locals each call slowing down CSV Paring

[issue29564] ResourceWarning: suggest to enable tracemalloc in the message

Change by STINNER Victor : -- keywords: +patch pull_requests: +9748 stage: test needed -> patch review ___ Python tracker ___ ___ Py

[issue29564] ResourceWarning: suggest to enable tracemalloc in the message

STINNER Victor added the comment: Example: --- import warnings import tracemalloc #tracemalloc.start(5) # always log ResourceWarning messages warnings.simplefilter("always", ResourceWarning) def func(): f = open(__file__) # emit ResourceWarning f = None func() --- Output with Pyt

[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

STINNER Victor added the comment: Can someone please try to write an example which only uses the stdlib? > The culprit is the isdigit function called in the parsers extension module. What are these extensions? Where do them come from? > Any way you can help test out a config setting to avoid

[issue30064] BaseSelectorEventLoop.sock_{recv, sendall}() don't remove their callbacks when canceled

Andrew Svetlov added the comment: New changeset 74387926072abf338a4c1cec1bf0501fc65bbee5 by Andrew Svetlov in branch 'master': bpo-30064: Refactor sock_* asyncio API (#10419) https://github.com/python/cpython/commit/74387926072abf338a4c1cec1bf0501fc65bbee5 -- __

[issue30064] BaseSelectorEventLoop.sock_{recv, sendall}() don't remove their callbacks when canceled

Change by Andrew Svetlov : -- resolution: -> fixed stage: patch review -> resolved status: open -> closed ___ Python tracker ___ __

[issue35219] macOS 10.14 High Sierra crashes in multiprocessing

New submission from Barry A. Warsaw : As we're beginning to roll out macOS 10.14 High Sierra, we're seeing an increase in core files inside /cores. This can consume a ton of disk space if you have coredumps enabled. I don't have a short reproducer yet, but we believe this is related to chan

[issue35213] IDLE: use 'macOS' where appropriate.

Terry J. Reedy added the comment: The history of names for 10.X, from the reference above (which also has nicknames, like 'Mavericks' and 'Mohave', which I believe we do not use). 10.0 to 10.7: Mac OS X (space or spaces sometime left out, as in macosx) 10.8 to 10.13: OS X (2012, ditto) 10.14

[issue35213] IDLE: use 'macOS' where appropriate.

Terry J. Reedy added the comment: The 4th line above should include 'macOS'. 10.14 to current 10.16: macOS (2016) -- ___ Python tracker ___ __

[issue22543] -W option cannot use non-standard categories

Change by Dmitry Shachnev : -- nosy: +mitya57 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.py

[issue35214] Get the test suite passing with clang Memory Sanitizer enabled

Gregory P. Smith added the comment: New changeset 1584a0081500d35dc93ff88e5836df35faf3e3e2 by Gregory P. Smith in branch 'master': bpo-35214: Initial clang MemorySanitizer support (GH-10479) https://github.com/python/cpython/commit/1584a0081500d35dc93ff88e5836df35faf3e3e2 -- __

[issue35214] Get the test suite passing with clang Memory Sanitizer enabled

Change by Gregory P. Smith : -- pull_requests: +9749 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://

[issue35220] delete "how do I emulate os.kill" section in Windows FAQ

New submission from Mathieu Dupuy : That section is a tip on how to kill process on Windows for Python prior to 2.7 and 3.2. 3.1 end of support was April 2012 and 2.6 was October 2013, so that hasn't been needed for supported versions of Python for more than 5 years. Beside not being needed a

[issue35218] decompressing and then re-compressing zipfiles with Python 3 zipfile loses flag_bits

Change by keeely : -- title: Impossible to round-trip decompress -> compress zipfiles with Python 3 due to losing flag_bits -> decompressing and then re-compressing zipfiles with Python 3 zipfile loses flag_bits ___ Python tracker

[issue35219] macOS 10.14 Mojave crashes in multiprocessing

Change by Barry A. Warsaw : -- title: macOS 10.14 High Sierra crashes in multiprocessing -> macOS 10.14 Mojave crashes in multiprocessing ___ Python tracker ___ __

[issue35219] macOS 10.14 Mojave crashes in multiprocessing

Barry A. Warsaw added the comment: That should of course be 10.14 Mojave. -- ___ Python tracker ___ ___ Python-bugs-list mailing li

[issue35219] macOS 10.14 Mojave crashes in multiprocessing

Pablo Galindo Salgado added the comment: Apparently setting the env variable OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES should fix some fork-related changes. Have you tried already doing this? Does it change the behaviour of the errors in any way? -- nosy: +pablogsal __

[issue35207] Disallow expressions like (a) = 42

Change by Pablo Galindo Salgado : -- resolution: -> not a bug stage: patch review -> resolved status: open -> closed ___ Python tracker ___ ___

[issue35219] macOS 10.14 Mojave crashes in multiprocessing

Barry A. Warsaw added the comment: On Nov 12, 2018, at 13:34, Pablo Galindo Salgado wrote: > Apparently setting the env variable OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES > should fix some fork-related changes. Have you tried already doing this? Does > it change the behaviour of the errors in

[issue35215] Replacing CPython memory allocation

Pablo Galindo Salgado added the comment: Hi @paul, have you already checked https://docs.python.org/3/c-api/memory.html#customize-memory-allocators? -- nosy: +pablogsal ___ Python tracker _

[issue35215] Replacing CPython memory allocation

Change by Pablo Galindo Salgado : -- Removed message: https://bugs.python.org/msg329755 ___ Python tracker ___ ___ Python-bugs-list

[issue35215] Replacing CPython memory allocation

Pablo Galindo Salgado added the comment: Hi @paul, have you already checked https://docs.python.org/3/c-api/memory.html#customize-memory-allocators ? -- ___ Python tracker _

[issue35219] macOS 10.14 Mojave crashes in multiprocessing

Pablo Galindo Salgado added the comment: Apparently, GitLab have a more permanent solution around this by enabling the Objective-C runtime before any forking happens: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/16649/diffs -- ___ Pytho

[issue35219] macOS 10.14 Mojave crashes in multiprocessing

Pablo Galindo Salgado added the comment: This can a duplicate of https://bugs.python.org/issue33725 -- ___ Python tracker ___ ___ P

[issue33725] High Sierra hang when using multi-processing

Change by Barry A. Warsaw : -- nosy: +barry ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.pyth

[issue35214] Get the test suite passing with clang Memory Sanitizer enabled

Gregory P. Smith added the comment: New changeset 5f4d05d83fde05fed0b6554d0beee4f1c1f1d8f1 by Gregory P. Smith in branch '3.7': [3.7] bpo-35214: Initial clang MemorySanitizer support (GH-10479) (GH-10492) https://github.com/python/cpython/commit/5f4d05d83fde05fed0b6554d0beee4f1c1f1d8f1

[issue35219] macOS 10.14 Mojave crashes in multiprocessing

Barry A. Warsaw added the comment: I'm not sure whether it's a duplicate or not, since in my case it doesn't hang, but instead core dumps. It's seems like the reasoning given in the Ruby bug is relevant to Python too, so maybe we should adopt the same workaround. For our internal projects,

[issue35216] misleading error message from shutil.copy()

Julien Palard added the comment: Using `cp` on Debian Buster I'm having a better error message: $ touch foo $ cp foo bar/ cp: failed to access 'bar/': Not a directory >From copy.c (from Debian coreutils): /* Improve quality of diagnostic when a nonexistent dst_name end

[issue35214] Get the test suite passing with clang Memory Sanitizer enabled

Change by Gregory P. Smith : -- pull_requests: +9751 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://

[issue35221] Enhance venv activate commands readability

New submission from Julien Palard : I'd like to enhance the readability of the "venv activation commands" in library/venv.html, my students are often confused by it, sometimes they copy the angle brackets, sometime even the prompt. I don't think we can fix everything, but maybe enhance a bit,

[issue35221] Enhance venv activate commands readability

Julien Palard added the comment: Forgot to mention, the bold and italics one were done using unicode mathematical characters, they are not properly rendered in PDFs so we can't use them as is: https://mdk.fr/pdf.png -- ___ Python tracker

[issue10486] http.server doesn't set all CGI environment variables

Rémi Lapeyre added the comment: The reference given in https://github.com/python/cpython/blob/b36b0a3765bcacb4dcdbf12060e9e99711855da8/Lib/http/server.py#L1074 is not accessible anymore. I think we should replace it by https://tools.ietf.org/html/rfc3875#section-4.1 -- _

[issue23930] http.cookies.SimpleCookie doesn't parse comma-only separated cookies correctly

Change by Rémi Lapeyre : -- keywords: +patch pull_requests: +9752 stage: -> patch review ___ Python tracker ___ ___ Python-bugs-list

[issue33944] Deprecate and remove pth files

Barry A. Warsaw added the comment: On Nov 10, 2018, at 04:50, Ivan Pozdeev wrote: > In its .pth file, each such package will import the hook's module (which will > cause the hook to be installed on the first import) and "register" its > namespaces and/or dependencies with it. The hook will t

[issue35222] email.utils.formataddr is not exactly the reverse of email.utils.parseaddr

New submission from skreft : The docs (https://docs.python.org/3/library/email.util.html#email.utils.formataddr) say that formataddr is the inverse of parseaddr, however non-ascii email addresses are treated differently in both methods. parseaddr will return non-ascci addresses, whereas forma

[issue35221] Enhance venv activate commands readability

Steven D'Aprano added the comment: https://docs.python.org/3/library/venv.html > my students are often confused by it, sometimes they copy the angle brackets, > sometime even the prompt. Learning to recognise placeholders and the prompt is an essential part of learning to code, and a stage

[issue35221] Enhance venv activate commands readability

Lisa Roach added the comment: Using plain angle brackets is common placeholder notation, and I think changing it to something different might be confusing to those who are familiar with the pattern. I have also seen plenty of people copying and pasting the wrong things because of this notati

[issue22393] multiprocessing.Pool shouldn't hang forever if a worker process dies unexpectedly

Oscar Esteban added the comment: I tried to reuse as much as I could from the patch, but it didn't solve the issue at first. I have changed the responsibility of identifying and prescribing a solution when a worker got killed. In the proposed patch, the thread handling results (i.e. tasks q

[issue10486] http.server doesn't set all CGI environment variables

Rémi Lapeyre added the comment: AUTH_TYPE, CONTENT_LENGTH, CONTENT_TYPE, REMOTE_USER are present REMOTE_IDENT is not but I'm not sure it's worth adding. I can send a PR to add REMOTE_HOST and remove the condition for QUERY_STRING. Otherwise, I don't think the other environment variables shoul

[issue35222] email.utils.formataddr is not exactly the reverse of email.utils.parseaddr

Rémi Lapeyre added the comment: This is indeed an issue with formataddr, it expects the input to be ascii encoded as RFC 2822 requires. Email is much more complicated though and has been internationalized, a summary of this work is available at https://en.wikipedia.org/wiki/Email_address#Int

[issue25438] document what codec PyMemberDef T_STRING decodes the char * as

Lysandros Nikolaou added the comment: It's been more than 3 years, since this was opened, but I will ask nevertheless. Should a PR maybe made for this issue? -- nosy: +lys.nikolaou ___ Python tracker __

[issue25438] document what codec PyMemberDef T_STRING decodes the char * as

Gregory P. Smith added the comment: it still seems relevant, having better docs is always good. -- ___ Python tracker ___ ___ Pytho

[issue35222] email.utils.formataddr is not exactly the reverse of email.utils.parseaddr

R. David Murray added the comment: Thanks for the report, but parseaddr and formataddr are defined *only* for ASCII. In the port to python3, parseaddr sort-of-maybe-sometimes does the naively expected thing with non-ascii, but that's just an accident. We could have added a check for non-asc

[issue35223] Pathlib incorrectly merges strings.

New submission from Roffild : Code: import os print(os.path.join("C:/123\\345", "\\", "folder///filename.bin")) import pathlib print(pathlib.PureWindowsPath("C:/123\\345", "\\", "folder///filename.bin")) Result: C:\folder///filename.bin C:\folder\filename.bin Expected result for Windows: C:\12

[issue35214] Get the test suite passing with clang Memory Sanitizer enabled

Gregory P. Smith added the comment: New changeset 3b5b1c0931cd32253bbf2f3bd74e90ff821e026e by Gregory P. Smith in branch '3.6': [3.6] bpo-35214: Initial clang MemorySanitizer support (GH-10479) (GH-10493) https://github.com/python/cpython/commit/3b5b1c0931cd32253bbf2f3bd74e90ff821e026e

[issue35215] Replacing CPython memory allocation

paul added the comment: Hi guys, First, thanks for the prompt replies. @matrixise: If there is i can't find it, but i am happy to accept it as a possibility. Equally, maybe there is an assumption about memory in the cpython implementation somewhere that goes against my memory allocator ->

[issue35223] Pathlib incorrectly merges strings.

Eric V. Smith added the comment: As far as which path components are returned, I think this is working as designed. The documentation for os.path.join says: """ If a component is an absolute path, all previous components are thrown away and joining continues from the absolute path component.

[issue35219] macOS 10.14 Mojave crashes in multiprocessing

Barry A. Warsaw added the comment: I've done a fair bit of testing and it seems rather inconsistent as to whether either of these work when added right before an explicit call to `os.fork()`: os.environ['OBJC_DISABLE_INITIALIZE_FORK_SAFETY'] = 'YES' ctyles.cdll.LoadLibrary('/System/Library/F

[issue35224] PEP 572: Assignment Expressions

New submission from Emily Morehouse : This issue will serve to track development and PRs for the implementation of PEP 572: Assignment Expressions. -- assignee: emilyemorehouse components: Interpreter Core messages: 329781 nosy: emilyemorehouse, gvanrossum, tim.peters priority: normal

[issue32492] C Fast path for namedtuple's property/itemgetter pair

Change by Pablo Galindo Salgado : -- pull_requests: +9754, 9755, 9756 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsub

[issue32492] C Fast path for namedtuple's property/itemgetter pair

Change by Pablo Galindo Salgado : -- pull_requests: +9754, 9755 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe

[issue32492] C Fast path for namedtuple's property/itemgetter pair

Change by Pablo Galindo Salgado : -- pull_requests: +9754 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: htt

[issue32492] C Fast path for namedtuple's property/itemgetter pair

Change by Pablo Galindo Salgado : -- pull_requests: -9756 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: ht

[issue32492] C Fast path for namedtuple's property/itemgetter pair

Change by Pablo Galindo Salgado : -- pull_requests: -9755 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: ht

[issue35222] email.utils.formataddr is not exactly the reverse of email.utils.parseaddr

skreft added the comment: @r.david.murray where do you see that those functions are only defined for ascii? There's nothing in the online docs stating that and furthermore `formataddr` has supported non-ascii names since version 3.3. RFC 2822 is however mentioned in the docstrings. The fact

[issue35031] test_asyncio test_start_tls_server_1 fails in AMD64 FreeBSD CURRENT buildbots

Change by miss-islington : -- pull_requests: +9757 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://ma

[issue35223] Pathlib incorrectly merges strings.

Roffild added the comment: It is necessary to assemble a single path from several lines depending on the OS. It is logical to expect behavior in Java. https://docs.oracle.com/javase/8/docs/api/java/nio/file/Paths.html Converts a path string, or a sequence of strings that when joined form a pa

[issue35224] PEP 572: Assignment Expressions

Change by Emily Morehouse : -- keywords: +patch pull_requests: +9758 stage: -> patch review ___ Python tracker ___ ___ Python-bugs-

[issue35224] PEP 572: Assignment Expressions

Change by Emily Morehouse : -- keywords: +patch, patch pull_requests: +9758, 9759 stage: -> patch review ___ Python tracker ___ ___

[issue35219] macOS 10.14 Mojave crashes in multiprocessing

Barry A. Warsaw added the comment: Based on my testing, the environment variable has to be set before the parent process starts. Neither os.environ nor os.putenv seem to do the trick. -- ___ Python tracker ___

[issue35031] test_asyncio test_start_tls_server_1 fails in AMD64 FreeBSD CURRENT buildbots

miss-islington added the comment: New changeset 3f9fe53c98978955fea4e36456c784694e6458a8 by Miss Islington (bot) in branch '3.7': bpo-35031: Fix test_start_tls_server_1 on FreeBSD buildbots (GH-10011) https://github.com/python/cpython/commit/3f9fe53c98978955fea4e36456c784694e6458a8

[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

Christoph Gohlke added the comment: > Can someone please try to write an example which only uses the stdlib? The simplest is to compare performance of the `windll.LoadLibrary('API-MS-WIN-CRT-STRING-L1-1-0.DLL')` function on Python 3.7.0a3 and 3.7.0a4, but that will mostly measure Python/ctyp

[issue35224] PEP 572: Assignment Expressions

Change by Eric V. Smith : -- nosy: +eric.smith ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.p

[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

Change by Christoph Gohlke : Added file: https://bugs.python.org/file47928/test_isdigit.c ___ Python tracker ___ ___ Python-bugs-list mailin

[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

Change by Christoph Gohlke : Added file: https://bugs.python.org/file47929/setup.py ___ Python tracker ___ ___ Python-bugs-list mailing list

[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

Dragoljub added the comment: Here is a simple pure python example: digits = ''.join([str(i) for i in range(10)]*1000) %timeit digits.isdigit() # --> 2X+ slower on python 3.7.1 Basically in Pandas C-code parser we call the isdigit() function for each number that is to be parsed. so 12345.

[issue29564] ResourceWarning: suggest to enable tracemalloc in the message

STINNER Victor added the comment: New changeset 2c07c493d2eb45101312e3eb3a77f94d0c9cad1f by Victor Stinner in branch 'master': bpo-29564: warnings suggests to enable tracemalloc (GH-10486) https://github.com/python/cpython/commit/2c07c493d2eb45101312e3eb3a77f94d0c9cad1f --

[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

Christoph Gohlke added the comment: I attached a minimal C extension module that can be used to demonstrate the performance degradation from Python 3.7.0a3 to 3.7.0a4. Build the extension with `py setup.py build_ext --inplace`, then run the following code on Python 3.7.0a3 to 3.7.0a4: ``` i

[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

STINNER Victor added the comment: > digits = ''.join([str(i) for i in range(10)]*1000) > %timeit digits.isdigit() # --> 2X+ slower on python 3.7.1 This code calls: * (Python) str.isdigit() * unicode_isdigit_impl() * _PyUnicode_IsDigit() * _PyUnicode_ToDigit() which uses Python internal Un

[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

STINNER Victor added the comment: test_isdigit.c: Can you try to call locale.setlocale(locale.LC_CTYPE, "") before running your benchmark on Python 3.7.0? This issue may be related to bpo-34485. -- ___ Python tracker

[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

STINNER Victor added the comment: > This issue may be related to bpo-34485. I'm thinking to: New changeset 177d921c8c03d30daa32994362023f777624b10d by Victor Stinner in branch 'master': bpo-34485, Windows: LC_CTYPE set to user preference (GH-8988) https://github.com/python/cpython/commit/177

[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

Christoph Gohlke added the comment: > test_isdigit.c: Can you try to call locale.setlocale(locale.LC_CTYPE, "") > before running your benchmark on Python 3.7.0? Yes, that slows down Python 3.7.0a3 to the 3.7.0a4 level. -- ___ Python tracker

[issue25438] document what codec PyMemberDef T_STRING decodes the char * as

Windson Yang added the comment: I will work on it today :D -- nosy: +Windson Yang ___ Python tracker ___ ___ Python-bugs-list maili

[issue35219] macOS 10.14 Mojave crashes in multiprocessing

Barry A. Warsaw added the comment: I'm still testing this solution, but it looks like if you set the environment variable, and then double fork, the granchild won't crash. Roughly: os.putenv('OBJC_DISABLE_INITIALIZE_FORK_SAFETY', 'YES') pid = os.fork() if pid == 0: subpid = os.fork()

[issue35219] macOS 10.14 Mojave crashes in multiprocessing

Barry A. Warsaw added the comment: Nope, actually double fork doesn't work. It's misleading because in my testing, the first invocation of the process causes the core dump, but subsequent runs do not. -- ___ Python tracker

[issue35214] Get the test suite passing with clang Memory Sanitizer enabled

Change by Alex Gaynor : -- nosy: +alex ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.or

[issue35225] test_faulthandler fails under ubsan

New submission from Benjamin Peterson : The UBsan buildbot is failing test_faulthandler. We should either spread some __attribute__((no_sanitize_undefined)) around or make the tests skip. == FAIL: test_enable_fd (test.test_fau

[issue35214] Get the test suite passing with clang Memory Sanitizer enabled

Change by Gregory P. Smith : -- pull_requests: +9760 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://

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