Re: Common objects for CLI commands with Typer

> On 21 Sep 2024, at 11:40, Dan Sommers via Python-list > wrote: > > Despite the fact that "everything is an object" in Python, you don't > have to put data or functions inside classes or objects. I also know > nothing about Typer, but there's nothing wrong with functions in a > module. Pyt

Re: Crash when launching python

> On 4 Sep 2024, at 16:27, Guenther Sohler via Python-list > wrote: > > Is it possible to turn on debugging and to display on the console, where > python is loading files from ? > I assume you have a .app that is then packaged into a .dmg. It will be the .app that you need to either build

Re: Getting a Process.start() error pickle.PicklingError: Can't pickle : it's not found as __builtin__.module with Python 2.7

> On 2 Sep 2024, at 15:00, marc nicole via Python-list > wrote: > > I am using Python 2.7 on Windows 10 Why? Install Python 3.12 and it will be easier to get help and support. If you have legacy that still needs porting then you can install 3.12 along side the unsupported 3.12. Barry --

Re: ListAdmin: Is list/archive working correctly?

> On 30 Aug 2024, at 23:28, dn via Python-list wrote: > > Me email (only) client shows a thread of 12 messages. > > The OP was @Gilmeh Serda (from an invalid email address). That appears in the > email thread > > @Stefan Ram has had two contributions quoted, but no such original-message >

Re: Error codes

> On 11 Aug 2024, at 13:06, Charlotte Plant via Python-list > wrote: > > Hiya, I'm using the sims 4 mod constructor by Zerbu, and when saving I'm > getting these error codes. > I'm going around in circles trying to figure out what is causing it, and I'm > stuck! > Can you help please? > Than

Re: Issue bootstrapping Python - troubleshooting steps?

> On 6 Aug 2024, at 02:49, Piper McCorkle via Python-list > wrote: > > $ /tmp/sources/Python-3.12.4/configure --enable-shared --with-system-expat > --enable-optimizations --prefix= I assume that you must provide a value for --prefix. The linux default would be --prefix=/usr Barry -- htt

Re: python C-api and thread

> On 6 Aug 2024, at 07:11, aotto1968 via Python-list > wrote: > > I know but I use a thread like a process because the "conversation" between > the threads is done by my > software. a Thread is usually faster to startup (thread-pool) this mean for > high-load this is > significant faster ev

Re: Installation of Slixfeed with pip fails

> On 30 Jul 2024, at 18:36, Schimon Jehudah via Python-list > wrote: > > Greetings, to one and all! > > My name is Schimon, and I am the developer of a news chat bot for the > XMPP network, called Slixfeed. > > I have recently added support for OMEMO encryption, and a friend of > mine has r

Re: A new feature request - parser add_mutually_exclusive_group - add a default value

> On 9 Jul 2024, at 06:13, ⁨אורי via Python-list⁩ <⁨python-list@python.org⁩> > wrote: > > I tried to subscribe to Python-ideas These days ideas are discussed on https://discuss.python.org/ It is rare to see an idea on the mailing list. Barry -- https://mail.python.org/mailman/listinfo/pyt

Re: PyGILState_Ensure() deadlocks, why?

> On 7 Jul 2024, at 23:21, Barry via Python-list wrote: > > > >> On 7 Jul 2024, at 22:09, Tomas Ukkonen via Python-list >> wrote: >> >>Py_Initialize(); > > You also need to tell python to init threading. I'm in front of my dev machine now and checking up on threading. There is no l

Re: Best (simplest) way to share data between processes

> On 7 Jul 2024, at 23:47, MRAB via Python-list wrote: > > For clarity I'd recommend os.replace instead. This is because on Windows > os.rename it would complain if the target file already exists, but os.replace > has the same behaviour on both Linux and Windows. Agreed. In this case the O

Re: Anonymous email users

> On 23 Jun 2024, at 06:58, Sebastian Wells via Python-list > wrote: > > The spammers won the spam wars, so even if you have someone's real > e-mail address, that's no guarantee that you can contact them. You > certainly wouldn't be able to contact me at my real e-mail address, > unless you a

Re: Suggested python feature: allowing except in context maneger

> On 13 Jun 2024, at 11:01, Yair Eshel via Python-list > wrote: > > I read this is a good place to give some suggestions for features in > python. Best place these days is to raise an idea on https://discuss.python.org/ Beware that this idea has come up in the past and was rejected. Barry

Re: Flubbed it in the second interation through the string: range error... HOW?

> On 29 May 2024, at 05:38, Kevin M. Wilson via Python-list > wrote: > > The format in this email is not of my making, should someone know, how to do > this so that it's a readable script do tell! > KMW Your mail program may have a plain-text mode to compose messages in try using that. B

Re: Making 'compiled' modules work with multiple python versions on Linux

> On 29 Mar 2024, at 16:09, Olivier B. > wrote: > > It is not a symlink on my system, where i built python myself, but a > 15KB so file. But it seems to lack lots of python symbols. > > Maybe what i should do is actually make libpython.so a physical copy > of libpyton311.so before linking to

Re: Feature proposal: unittest.mock.NAN

Python ideas are discussed here these days: https://discuss.python.org/ Suggest you raise this there in the Ideas category. Barry > On 24 Jan 2024, at 17:11, Kerrick Staley via Python-list > wrote: > > I think we should define a unittest.mock.NAN constant that can be used with > Mock.assert_c

Re: Python 3.12.1, Windows 11: shebang line #!/usr/bin/env python3 doesn't work any more

> On 7 Jan 2024, at 15:09, Sibylle Koczian via Python-list > wrote: > > Oh, and the two Windows and Python versions are on two different computers. > > Will remove the "/env" from my shebang lines, even if I don't understand > what's happening. Thanks for the details. Only thing I can thi

Re: Python 3.12.1, Windows 11: shebang line #!/usr/bin/env python3 doesn't work any more

> On 2 Jan 2024, at 17:24, Thomas Passin via Python-list > wrote: > > You might learn about this if you happen to read and remember the right part > of the Python docs. Otherwise you have no idea what py.exe is up to nor how > it does it. I would say that most people don't know there's an

Re: Python 3.12.1, Windows 11: shebang line #!/usr/bin/env python3 doesn't work any more

> On 23 Dec 2023, at 03:01, Thomas Passin via Python-list > wrote: > > Not on my system. It may depend on whether Python gets installed to Program > Files or to %USERPROFILE%/AppData/Local/Programs/Python. Python 3.9 is the > last verson I installed to Program Files, and that's the version

Re: making your own DirEntry.

> On 23 Dec 2023, at 09:48, Antoon Pardon via Python-list > wrote: > > Because I have functions with DirEntry parameters. I would duck-type a class I control to be my DirEnrry in this situation. Would also help you when debugging as you can tell injected DirEntry from "real" DirEntry. Barr

Re: How/where to store calibration values - written by program A, read by program B

> On 6 Dec 2023, at 09:32, Chris Green via Python-list > wrote: > > My requirement is *slightly* more complex than just key value pairs, > it has one level of hierarchy, e.g.:- > >KEY1: > a: v1 > c: v3 > d: v4 >KEY2: > a: v7 > b: v5 > d: v6 > > Differen

Re: How/where to store calibration values - written by program A, read by program B

> On 5 Dec 2023, at 14:37, Chris Green via Python-list > wrote: > > Are there any Python modules aimed specifically at this sort of > requirement? I tend to use JSON for this type of thing. Suggest that you use the options to pretty print the json that is saved so that a human can read it.

Re: Request: inspect: signature & getfullargspec & getcallargs

> On 4 Dec 2023, at 02:29, Dom Grigonis via Python-list > wrote: > > Hello, > > I have a request. > > Would it be possible to include `follow_wrapper_chains` and `skip_bound_arg` > arguments to higher level functions of `inspect` module? > > Would exposing them, but setting defaults to wh

Re: Silly (maybe) question re imported module(s)

> On 19 May 2023, at 07:44, Grizzy Adams via Python-list > wrote: > > Morning All > > I'm working through the tutorial and running / saving work that I wish to > keep > and build on, most times I can save and (re)import later with no difference > to > when typed in console or editor and

Re: Windows Gui Frontend

> On 1 Apr 2023, at 18:47, Igor Korot wrote: > > I suggest going with wxPython/wxGlade. I ported all my wxPython code to PyQt and have not regretted it. wxPython was (its been a while so may not be an issue now) far to hard to make consistent across OS, my apps run on Linux, macOS and Window

Re: Python not showing correct version

> On 31 Mar 2023, at 22:02, Eryk Sun wrote: > > > The OP installed the standard Python 3.8 distribution, which does > install the launcher by default. The launcher can run all installed > versions, including store app installations. By default it runs the > highest available version, which wi

Re: Python not showing correct version

ause of this I am not able to proceed with next steps. > > Thanks > Sumeet > > On Thu, 30 Mar 2023 at 22:45, Barry Scott <mailto:ba...@barrys-emacs.org>> wrote: >> >> >>> On 30 Mar 2023, at 15:17, Sumeet Firodia >> <mailto:ssfiro...@gmail.com&

Re: built-in pow() vs. math.pow()

> On 30 Mar 2023, at 18:11, Barry Scott wrote: > > > >> On 30 Mar 2023, at 10:15, Andreas Eisele wrote: >> >> I sometimes make use of the fact that the built-in pow() function has an >> optional third argument for modulo calculation, which is handy whe

Re: Python not showing correct version

> On 30 Mar 2023, at 15:17, Sumeet Firodia wrote: > >> >> Hi Team, >> >> I have installed Python 3.8 for Snowpark but when I check the version in >> command prompt it shows me Python 3.10.10. >> >> C:\Users\admin>python --version >> Python 3.10.10 Try this: py -3.8 And this to list all v

Re: built-in pow() vs. math.pow()

> On 30 Mar 2023, at 10:15, Andreas Eisele wrote: > > I sometimes make use of the fact that the built-in pow() function has an > optional third argument for modulo calculation, which is handy when dealing > with tasks from number theory, very large numbers, problems from Project > Euler, et

Re: PyGILState_Release called twice in embedded application

> On 23 Mar 2023, at 08:46, Arnaud Loonstra wrote: > > Hi all, > > I'm running in a crash due to a ResourceWarning (some socket is not closed in > a used module) after calling PyGILState_Release. > > I'm running Python in a native thread (so a thread created by C not Python). > I'm acquiri

Re: Is there a more efficient threading lock?

On 25/02/2023 23:45, Jon Ribbens via Python-list wrote: I think it is the case that x += 1 is atomic but foo.x += 1 is not. No that is not true, and has never been true. :>>> def x(a): :...    a += 1 :... :>>> :>>> dis.dis(x)  1   0 RESUME   0  2   2 LOAD_FAST

Re: file.read Method Documentation (Python 2.7.10)

On 09/01/2023 14:34, Stephen Tucker wrote: Dear Python-list, Yes, I know that Python 2.x is no longer supported. I have found that the documentation for this method is misleading when the file being read is UTF-8-encoded: Instead of reading *size* bytes, the method reads *size *UTF-8 byt

Re: What should go to stdout/stderr and why Python logging write everything to stderr?

On 03/01/2023 21:24, c.bu...@posteo.jp wrote: Am 03.01.2023 17:51 schrieb r...@zedat.fu-berlin.de: logging.getLogger().addHandler( logging.StreamHandler( sys.stdout )) But I don't want to make all log levels go to stdout. Just DEBUG and INFO. But this would be a workaround. The main quest

Re: What should go to stdout/stderr and why Python logging write everything to stderr?

On 03/01/2023 21:24, c.bu...@posteo.jp wrote: Am 03.01.2023 17:51 schrieb r...@zedat.fu-berlin.de: logging.getLogger().addHandler( logging.StreamHandler( sys.stdout )) But I don't want to make all log levels go to stdout. Just DEBUG and INFO. But this would be a workaround. The main quest

Re: What should go to stdout/stderr and why Python logging write everything to stderr?

On 04/01/2023 06:46, Chris Angelico wrote: I've known some systems to have a trigger of "reading on FD 0 flushes FD 1" C++ has this feature: Quote from https://en.cppreference.com/w/cpp/io/cin "Once |std::cin| is constructed, std::cin.tie() returns &std::cout

Re: What should go to stdout/stderr and why Python logging write everything to stderr?

On 04/01/2023 02:26, Chris Angelico wrote: Reading/writing the FD is the same as using stdout (technically you'd write to fd 1 and read from fd 0), but yes, can use /dev/tty to reach for the console directly. I think the logic is more like checking that stdin is a tty then using the tty it to

Re: Possible re bug

Please please fix you email client so that your replies stay with the emails you are replying to. Barry On 28/12/2022 19:09, Stefan Ram wrote: Alexander Richert writes: |print(re.findall(".*","pattern")) |yields ['pattern',''] which is not what I was expecting. The asterisk is "greedy", so

Re: Does one have to use curses to read single characters from keyboard?

> On 11 Dec 2022, at 18:50, Chris Green wrote: > > My solution in the end was copied from one I found that was much > simpler and straightforward than most. I meant to post this earlier > but it got lost somewhere:- > >import sys, termios, tty ># ># ># Read a single character

Re: NEO6 GPS with Py PICO with micropython

> On 30 Nov 2022, at 10:58, KK CHN wrote: > > List, > > Just commented the // gpsModule.readline() in the while loop, ( > refer the link > https://microcontrollerslab.com/neo-6m-gps-module-raspberry-pi-pico-micropython/ > ) > > > while True: # gpsModule.readline() // This line comm

Re: Python 3.11.0 installation and Tkinter does not work

> On 23 Nov 2022, at 06:31, Stefan Ram wrote: > > darkst...@o2online.de writes: >> I want learn python for 4 weeks and have problems, installing Tkinter. If I= >> installed 3.11.0 for my windows 8.1 from python.org and type > > Ok, so you already installed from python.org. I wonder a > littl

Re: How to manage python shebang on mixed systems?

> On 7 Nov 2022, at 09:28, Chris Green wrote: > > Chris Green wrote: >>> 3: with your pseudo "python3" script in place, make all the scripts use >>> the "#!/usr/bin/env python3" shebang suggested above. >>> >> Yes, that sounds a good plan to me, thanks Cameron. >> > Doesn't '#!/usr/bin/env

Re: Information about slow execution notebook

> On 1 Nov 2022, at 16:08, nhlanhlah198506 wrote: > > I wish to know why sometimes my notebook won't execute my program And VS code > won't connect to kernels. Thank you Nhlanhla Ndwandwe Sent from my Galaxy You need to provide details on what you do and what happens. Reminder do not attach

Re: UTF-8 and latin1

> On 25 Oct 2022, at 11:16, Stefan Ram wrote: > > r...@zedat.fu-berlin.de (Stefan Ram) writes: >> You can let Python guess the encoding of a file. >> def encoding_of( name ): >> path = pathlib.Path( name ) >> for encoding in( "utf_8", "cp1252", "latin_1" ): >> try: >> with path.open( encoding=e

Re: Any PyQt developers here?

There is an active PyQt mailing list that has lots of helpful and knowledgeable people on it. https://www.riverbankcomputing.com/mailman/listinfo/pyqt Barry > On 25 Oct 2022, at 18:03, DFS wrote: > > Having problems with removeRow() on a QTableView object. > > After calling removeRow(), the

Re: Ref-strings in logging messages (was: Performance issue with CPython 3.10 + Cython)

> On 8 Oct 2022, at 11:50, Weatherby,Gerard wrote: > > Logging does support passing a callable, if indirectly. It only calls __str__ > on the object passed if debugging is enabled. > > class Defer: > > def __init__(self,fn): > self.fn = fn > > def __str__(self): > r

Re: Changing 'Scripts/*.exe'

> On 1 Oct 2022, at 16:50, Gisle Vanem via Python-list > wrote: > > Hello list. > > I'm moved my old Python27 installation from > f:\ProgramFiler\Python27 ( == 'ProgramFiles') > to > f:\gv\Python27 The design of Windows installed software makes this hard to do without a lot of knowledge

Re: Python 3.9.14

> On 14 Sep 2022, at 14:03, ⁨אורי⁩ <⁨u...@speedy.net⁩> wrote: > > Hi, > > Python 3.9.14 has been released on Sept. 6, 2022. As I can see written on > https://www.python.org/downloads/release/python-3914/: > > According to the release calendar specified in PEP 596, Python 3.9 is now > in the "s

Re: why I cannot to install packages?

> On 15 Sep 2022, at 12:31, ⁨נתי שטרן⁩ <⁨nsh...@gmail.com⁩> wrote: > > [image: image.png] Images are stripped; please copy the text of the error you are seeing and post that. Barry > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/p

Re: Simple TCP proxy

Morten, As Chris remarked you need to learn a number of networking, python, system performance and other skills to turn your project into production code. Using threads does not scale very well. Its uses a lot of memory and raises CPU used just to do the context switches. Also the GIL means tha

script folder is empty

rr>pip --version 'pip' is not recognized as an internal or external command, operable program or batch file. I've done some troubleshooting, and nothing is in the C:\Program Files\Python310\Scripts folder. I"m not a noob.. but obviously, I missing something.. I doubt

Re: Python 3.9 pidfd_open

> On 5 Jul 2022, at 19:47, Weatherby,Gerard wrote: > > python introduced os.pidfd_open(), which works as documented. > > My development environment, PyCharm, complains about it being undefined. > > Should it be in > https://raw.githubusercontent.com/python/cpython/3.9/Lib/os.py ? When face

Re: Building on Windows

> On 2 Jul 2022, at 15:41, Sam Ezeh wrote: > > To add to this, my process was > > 1. Setup the VM > 2. Install Git > 3. Clone CPython > 4. Run `PCbuild\build.bat -d -e` > 5. Notice the error, then install visual studio community 2022 Try running this: call "C:\Program Files\Microsoft Visual

Re: Subtract n months from datetime [Why?]

> On 22 Jun 2022, at 17:59, Paulo da Silva > wrote: > > Às 05:29 de 21/06/22, Paulo da Silva escreveu: > > As a general response to some comments ... > > Suppose we need to delete records from a database older than ... > Today, it's usual to specify days. For example you have to keep some go

Re: Logging into single file from multiple modules in python when TimedRotatingFileHandler is used

> On 22 Jun 2022, at 11:06, Lars Liedtke wrote: > > Could be unrelated and only a part of a solution, but if you are on a unixoid > system, you could use logrotate, instead of TimedRotatingFileHandler. > logfrotate ensures that the logging service does not realize, its logs have > been rota

Re: How to replace characters in a string?

> On 8 Jun 2022, at 18:01, Dave wrote: > > Hi, > > This is a tool I’m using on my own files to save me time. Basically or most > of the tracks were imported with different version iTunes over the years. > There are two problems: > > 1. File System characters are replaced (you can’t have ‘

Re: How to test characters of a string

> On 7 Jun 2022, at 23:24, Dave wrote: > > Yes, it was probably just a typeo on my part. > > I’ve now fixed the majority of cases but still got two strings that look > identical but fail to match, this time (again by 10cc), “I’m Mandy Fly Me”. > > I’m putting money on it being a utf8 problem

Re: tail

> On 8 May 2022, at 17:05, Marco Sulla wrote: > > I think I've _almost_ found a simpler, general way: > > import os > > _lf = "\n" > _cr = "\r" > > def tail(filepath, n=10, newline=None, encoding=None, chunk_size=100): >n_chunk_size = n * chunk_size Why use tiny chunks? You can read 4K

Re: tail

> On 7 May 2022, at 22:31, Chris Angelico wrote: > > On Sun, 8 May 2022 at 07:19, Stefan Ram wrote: >> >> MRAB writes: >>> On 2022-05-07 19:47, Stefan Ram wrote: >> ... def encoding( name ): path = pathlib.Path( name ) for encoding in( "utf_8", "latin_1", "cp1252" ):

Re: tail

> On 7 May 2022, at 14:40, Stefan Ram wrote: > > Marco Sulla writes: >> So there's no way to reliably read lines in reverse in text mode using >> seek and read, but the only option is readlines? > > I think, CPython is based on C. I don't know whether > Python's seek function directly call

Re: convenience

> On 22 Mar 2022, at 18:00, Avi Gross via Python-list > wrote: > > An earlier post talked about a method they used for "convenience" in a way > they apparently did not understand and many of us educated them, hopefully. > > That made me wonder of teh impact on our code when we use various f

Re: virtualenv and make DESTDIR=

> On 5 Mar 2022, at 19:56, Hartmut Goebel wrote: > > Am 05.03.22 um 17:34 schrieb Barry Scott: >> Have the RPM install all the pythone code and dependencies and also install >> a short script that >> sets up PYTHONPATH, LD_LIBRARY_PATH, etc and execs the pyt

Re: virtualenv and make DESTDIR=

> On 5 Mar 2022, at 19:56, Hartmut Goebel wrote: > > Am 05.03.22 um 17:34 schrieb Barry Scott: >> Have the RPM install all the pythone code and dependencies and also install >> a short script that >> sets up PYTHONPATH, LD_LIBRARY_PATH, etc and execs the python3 .py

Re: virtualenv and make DESTDIR=

> On 5 Mar 2022, at 19:56, Hartmut Goebel wrote: > > Am 05.03.22 um 17:34 schrieb Barry Scott: >> Have the RPM install all the pythone code and dependencies and also install >> a short script that >> sets up PYTHONPATH, LD_LIBRARY_PATH, etc and execs the python3 .py

Re: virtualenv and make DESTDIR=

> On 5 Mar 2022, at 16:59, Marco Sulla wrote: > > On Sat, 5 Mar 2022 at 17:36, Barry Scott wrote: >> Note: you usually cannot use pip when building an RPM with mock as the >> network is disabled inside the build for >> security reasons. > > Can't he pr

Re: virtualenv and make DESTDIR=

> On 4 Mar 2022, at 13:03, Hartmut Goebel wrote: > > Hi, > > How can I make installing a virtual environment honor DESTDIR? How can I > install a virtual environment in $(DESTDIR)$(PREFIX), which behaves as being > set-up in $(PREFIX)? (Of course, this virtual environment can not be used. My

Re: Getting Syslog working on OSX Monterey

> On 4 Mar 2022, at 21:23, Peter J. Holzer wrote: > > On 2022-02-28 22:05:05 +0000, Barry Scott wrote: >> On 28 Feb 2022, at 21:41, Peter J. Holzer wrote: >>> On 2022-02-27 22:16:54 +, Barry wrote: >>>> I have always assumed that if I want a logger sy

Re: Getting Syslog working on OSX Monterey

or years, been behaving as such when using > logging.handlers.SysLogHandler with a config in /etc/asl/ to define how it > should be routed and the rollover/cleanup frequency. > > Thanks for replying, just having trouble understanding. > > > On Mon, Feb 28, 2022 at 2:07

Re: Behavior of the for-else construct

> On 3 Mar 2022, at 13:24, computermaster360 > wrote: > > I want to make a little survey here. > > Do you find the for-else construct useful? No. I always have to look up what condition the else fires on. > Have you used it in > practice? No. > Do you even know how it works, or that ther

Re: Getting Syslog working on OSX Monterey

> On 28 Feb 2022, at 21:41, Peter J. Holzer wrote: > > On 2022-02-27 22:16:54 +, Barry wrote: >> If you look at the code of the logging modules syslog handle you will see >> that >> it does not use syslog. It’s assuming that it can network to a syslog >> listener. >> Such a listener is no

Re: ping script

> On 27 Feb 2022, at 13:53, Byung-Hee HWANG wrote: > > simple ping check script with python3 (Python 3.9.2) > tested under Debian 11 Bullseye: > > soyeomul@penguin:~/gitlab/test$ ./fping.py localhost > ok > soyeomul@penguin:~/gitlab/test$ ./fping.py python.org > ok > soyeomul@penguin:~/gitlab

Re: One-liner to merge lists?

> On 22 Feb 2022, at 09:30, Chris Angelico wrote: > > On Tue, 22 Feb 2022 at 20:24, Frank Millman > wrote: >> >> Hi all >> >> I think this should be a simple one-liner, but I cannot figure it out. >> >> I have a dictionary with a number of keys, where each value

Re: Best way to check if there is internet?

> On 25 Feb 2022, at 18:07, Abdur-Rahmaan Janhangeer > wrote: > > Normally people put Python in the scripting category. > I learnt typed languages like C++ and Java at first. > People who learn languages like these tend to put > Python in a non-serious category. The post was > more ironic tha

Re: venv and executing other python programs

> On 15 Feb 2022, at 12:36, Martin Di Paola wrote: > > I did a few experiments in my machine. I created the following foo.py > > import pandas > print("foo") > > Now "pandas" is installed under Python 3 outside the venv. I can run it > successfully calling "python3 foo.py". > > If I add

Re: venv and executing other python programs

> On 15 Feb 2022, at 05:35, Mirko via Python-list > wrote: > > Hi, > > I have recently started using venv for my hobby-programming. There > is an annoying problem. Since venv modifies $PATH, python programs > that use the "#!/usr/bin/env python" variant of the hashbang often > fail since the

Re: Data unchanged when passing data to Python in multiprocessing shared memory

> On 1 Feb 2022, at 23:40, Jen Kris wrote: > > Barry, thanks for your reply. > > On the theory that it is not yet possible to pass data from a non-Python > language to Python with multiprocessing.shared_memory, I bypassed the problem > by attaching 4 bytes to my FIFO pipe message from NASM

Re: Puzzling behaviour of Py_IncRef

> On 27 Jan 2022, at 07:46, Tony Flury wrote: > > > On 26/01/2022 22:41, Barry wrote: >> >> >> Run python and your code under a debugger and check the ref count of the >> object as you step through the code. >> >> Don’t just step through your code but also step through the C python code. >

Re: How to test for maildir 'folder' in Python?

> On 22 Jan 2022, at 21:26, Chris Green wrote: > > I have a script that walks a quite deep tree of mail messages to find > and archive old messages. I'm trying to convert it from mbox to > maildir (as I now store my mail in maildir format). > > So I need to test whether a point I have reached

Re: Puzzling behaviour of Py_IncRef

> On 19 Jan 2022, at 10:57, Tony Flury via Python-list > wrote: > > I am writing a C extension module for an AVL tree, and I am trying to ensure > reference counting is done correctly. I was having a problem with the > reference counting so I worked up this little POC of the problem, and I

Re: Why There Is No Python Compressed Archive or Binaries ?

> On 17 Jan 2022, at 19:53, Sina Mobasheri wrote: > > Consider scenario that I want run python 3.10 in CentOS 8, I think last > python version in CentOS repository is 3.6, if I use epel I can get 3.8 so > ..., I think (correct me if I'm wrong 🙏🏻) the only way that I can run python > 3.10 is

Re: Who wrote Py_UNREACHABLE?

> On 2 Jan 2022, at 16:17, Marco Sulla wrote: > > #if defined(RANDALL_WAS_HERE) > # define Py_UNREACHABLE() \ >Py_FatalError( \ >"If you're seeing this, the code is in what I thought was\n" \ >"an unreachable state.\n\n" \ >"I could give you advice for what to do,

Re: recover pickled data: pickle data was truncated

> On 1 Jan 2022, at 16:13, Marco Sulla wrote: > > I agree with Barry. You can create a folder or a file with > pseudo-random names. I recommend you to use str(uuid.uuid4()) At work and personally I use iso-8601 timestamps to make the files unique and easy to find out when they where created.

Re: recover pickled data: pickle data was truncated

> On 26 Dec 2021, at 13:44, Marco Sulla wrote: > > Use a semaphore. > > On Sun, 26 Dec 2021 at 03:30, iMath wrote: >> >> Normally, the shelve data should be read and write by only one process at a >> time, but unfortunately it was simultaneously read and write by two >> processes, thus co

Re: Uninstall old python version(Python 3.9.7)

> On 25 Dec 2021, at 06:13, Công Huy wrote: > > I had uninstalled Python 3.9.7 before but it wasn't uninstalled > completely. I found it still in my computer and when I click "uninstall", > it sent me a board "No Python 3.9 installation was detected". Of course, > it won't be an issue i

Re: What's the public API alternative to _PyObject_GC_IS_TRACKED()?

> On 26 Dec 2021, at 13:48, Marco Sulla wrote: > > I have to use _PyObject_GC_IS_TRACKED(). It can't be used unless you > define Py_BUILD_CORE. I want to avoid this. What macro or function can > substitute it? Why is this needed by your code? Surely the GC does its thing as an implementation

Re: Selection sort

> On 24 Dec 2021, at 14:22, vani arul wrote: > > Hello, > I am trying write a code.Can some help me find the error in my code. > Thanks! > > > def selectionsort(arr): > # le=len(arr) >for b in range(0,len(arr)-1): >pos=b >for a in range(b+1,len(arr)-1): >if

Re: Py_TRASHCAN_SAFE_BEGIN/END in C extension?

> On 22 Dec 2021, at 08:14, Marco Sulla wrote: > > Yes, it's deprecated, but I need it for Python 3.7, since there was > yet no Py_TRASHCAN_BEGIN / END Hopefully the bug report will makes clear what you have to do in your code to get things working. Barry > > On Tue, 21 Dec 2021 at 23:22,

Re: Python child process in while True loop blocks parent

> On 8 Dec 2021, at 17:11, Jen Kris wrote: > > I started this post on November 29, and there have been helpful comments > since then from Barry Scott, Cameron Simpson, Peter Holzer and Chris > Angelico. Thanks to all of you. > > I've found a solution that works

Re: Python child process in while True loop blocks parent

> On 6 Dec 2021, at 21:05, Jen Kris wrote: > > Here is what I don't understand from what you said. "The child process is > created with a single thread—the one that called fork()." To me that implies > that the thread that called fork() is the same thread as the child process. > I guess y

Re: threading and multiprocessing deadlock

> On 5 Dec 2021, at 23:50, Johannes Bauer wrote: > > Hi there, > > I'm a bit confused. In my scenario I a mixing threading with > multiprocessing. Threading by itself would be nice, but for GIL reasons > I need both, unfortunately. I've encountered a weird situation in which > multiprocessing

Re: Python child process in while True loop blocks parent

> On 6 Dec 2021, at 17:09, Jen Kris via Python-list > wrote: > > I can't find any support for your comment that "Fork creates a new > process and therefore also a new thread." From the Linux man pages > https://www.man7.org/linux/man-pages/man2/fork.2.html, "The child process is > created w

Re: Python child process in while True loop blocks parent

> On 1 Dec 2021, at 16:01, Jen Kris wrote: > > Thanks for your comment re blocking. > > I removed pipes from the Python and C programs to see if it blocks without > them, and it does. > It looks now like the problem is not pipes. Ok. > I use fork() and execv() in C to run Python in a child

Re: Python child process in while True loop blocks parent

> On 29 Nov 2021, at 22:31, Jen Kris wrote: > > Thanks to you and Cameron for your replies. The C side has an epoll_ctl set, > but no event loop to handle it yet. I'm putting that in now with a pipe > write in Python-- as Cameron pointed out that is the likely source of > blocking on C. T

Re: Eventfd with epoll BlockingIOError

> On 25 Nov 2021, at 22:29, jenk...@tutanota.com wrote: > > Thanks very much for your reply. > > I am now getting a single event returned in Python, but it's not the right > event, as I'll explain below. > > I rearranged the Python code based on your comments: > > #!/usr/bin/python3 > impo

Re: pyinstaller wrong classified as Windows virus

> On 25 Nov 2021, at 09:20, Ulli Horlacher > wrote: > > When I compile my programs with pyinstaller, Windows classifies them as > virus and even deletes them! Microsoft will fix the malware detection if you provide the info they need. Submit false positive info to: https://www.microsoft.co

Re: Eventfd with epoll BlockingIOError

> On 24 Nov 2021, at 22:42, Jen via Python-list wrote: > > I have a C program that uses fork-execv to run Python 3.10 in a child > process, and I am using eventfd with epoll for IPC between them. The eventfd > file descriptor is created in C and passed to Python through execv. Once the > P

Re: Using astype(int) for strings with thousand separator

> On 14 Nov 2021, at 15:41, Mahmood Naderan via Python-list > wrote: > > Hi > > While reading a csv file, some cells have values like '1,024' which I mean > they contains thousand separator ','. Therefore, when I want to process them > with > > row = df.iloc[0].astype(int) remove the

Re: Unable to compile my C Extension on Windows: unresolved external link errors

ange any conflicting symbols of course. Barry > > On Sat, 13 Nov 2021 at 12:17, Marco Sulla > wrote: >> >> . Sorry, the problem is I downloaded the 32 bit version of VS >> compiler and 64 bit version of Python.. >> >> On Sat, 13 Nov 2021 at

Re: Unable to compile my C Extension on Windows: unresolved external link errors

> On 13 Nov 2021, at 09:00, Barry wrote: > > > >> On 12 Nov 2021, at 22:53, Marco Sulla wrote: >> >> It seems that on Windows it doesn't find python3.lib, >> even if I put it in the path. So I get the `unresolved external link` >> errors. > > I think you need the python310.lib (not sure o

Re: Definitive guide for Regex

Barry > > Regards, > > David > > On Thu, 30 Sept 2021 at 22:02, Barry Scott <mailto:ba...@barrys-emacs.org>> wrote: > > > > On 30 Sep 2021, at 19:35, dn via Python-list > <mailto:python-list@python.org>> wrote: > > > > On 01/1

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