🌐 Mailman 3 January 2025 - Python-list - python.org

Re: Tools to help with text mode (i.e. non-GUI) input
by rustbuckett＠nope.com Jan. 12, 2025

Jan. 12, 2025

This is what I was going to suggest. Rich is super easy to use.

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subprocess.Popen does not launch audacity
by Tim Johnson Jan. 10, 2025

Jan. 10, 2025

Using Python 3.12.3 on Ubuntu 24.04 I've converted a legacy python2 script to python3. All went well. However, a glitch from python2 remains. The script uses dmenu to create menus to pick applications. Applications are then invoked from python using subprocess.Popen(). I have never been able to successfully launch audacity using this approach, which does work for other apps. I can launch audacity successfully using dmenu_run (on its own, outside of the script) Below is the pertinent code: Popen(choice, stdout=PIPE, stderr=PIPE, stdin=PIPE, close_fds=True) My guess is my argument list is either insufficient or an argument is causing the problem, but am unsure of which. I have been retired from python programming for ten years, and am pretty rusty, but it is still fun. There are plenty of other ways to successfully launch audacity but it would be great to make it work from this script. Thanks in advance Tim

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ANN: Python Meeting Düsseldorf - 22.01.2025
by eGenix Team Jan. 9, 2025

Jan. 9, 2025

/This announcement is in German since it targets a local user group//meeting in Düsseldorf, Germany/ Ankündigung Python Meeting Düsseldorf - Januar 2025 <https://www.egenix.com/company/news/Python-Meeting-Duesseldorf-2025-01-22> Ein Treffen von Python Enthusiasten und Interessierten in ungezwungener Atmosphäre. *22.01.2025, 18:00 Uhr* Raum 1, 2.OG im Bürgerhaus Stadtteilzentrum Bilk <http://www.duesseldorf.de/jugendamt/fam/famfoe/bueh/ac/index.shtml> Düsseldorfer Arcaden <http://www.duesseldorf-arcaden.de/anfahrt.html>, Bachstr. 145, 40217 Düsseldorf <http://maps.google.com/maps?q=51.209169,6.775339&layer=c&sll=51.209353,6.77…> Programm Bereits angemeldete Vorträge: * Daniel Schmitz: /*Maintaining SciPy: Large scale Open Source in practice */ * Arkadius Schuchhardt: /*Erfahrungen mit Reflex */ * Marc-André Lemburg: /*Programming hardware displays the easy way - using MicroPython and LVGL */ * Jochen Wersdörfer: /*Skip the Overhead: Lean Web Development with Django */ * Klaus Bremer: /*Server Side Events (SSE) with htmx and async frameworks*/ Weitere Vorträge können gerne noch angemeldet werden. Bei Interesse, bitte unter info(a)pyddf.de melden. Startzeit und Ort Wir treffen uns um 18:00 Uhr im Bürgerhaus in den Düsseldorfer Arcaden. Das Bürgerhaus teilt sich den Eingang mit dem Schwimmbad und befindet sich an der Seite der Tiefgarageneinfahrt der Düsseldorfer Arcaden. Über dem Eingang steht ein großes "Schwimm’ in Bilk" Logo. Hinter der Tür direkt links zu den zwei Aufzügen, dann in den 2. Stock hochfahren. Der Eingang zum Raum 1 liegt direkt links, wenn man aus dem Aufzug kommt. >>> Eingang in Google Street View <http://bit.ly/11sCfiw> *⚠️ Wichtig*: Bitte nur dann anmelden, wenn ihr absolut sicher seid, dass ihr auch kommt. Angesichts der begrenzten Anzahl Plätze, haben wir kein Verständnis für kurzfristige Absagen oder No-Shows. Einleitung Das Python Meeting Düsseldorf <http://pyddf.de/> ist eine regelmäßige Veranstaltung in Düsseldorf, die sich an Python Begeisterte aus der Region wendet. Einen guten Überblick über die Vorträge bietet unser PyDDF YouTube-Kanal <http://www.youtube.com/pyddf/>, auf dem wir Videos der Vorträge nach den Meetings veröffentlichen. Veranstaltet wird das Meeting von der eGenix.com GmbH <https://www.egenix.com/>, Langenfeld, in Zusammenarbeit mit Clark Consulting & Research <http://www.clark-consulting.eu/>, Düsseldorf: Format Das Python Meeting Düsseldorf <http://pyddf.de/> nutzt eine Mischung aus (Lightning) Talks und offener Diskussion. Vorträge können vorher angemeldet werden, oder auch spontan während des Treffens eingebracht werden. Ein Beamer mit HDMI und FullHD Auflösung steht zur Verfügung. (Lightning) Talk Anmeldung bitte formlos per EMail an info(a)pyddf.de <mailto:info@pyddf.de?subject=Anmeldung Lightning Talk Python Meeting Düsseldorf> Kostenbeteiligung Das Python Meeting Düsseldorf <http://pyddf.de/> wird von Python Nutzern für Python Nutzer veranstaltet. Da Tagungsraum, Beamer, Internet und Getränke Kosten produzieren, bitten wir die Teilnehmer um einen Beitrag in Höhe von EUR 10,00 inkl. 19% Mwst. Schüler und Studenten zahlen EUR 5,00 inkl. 19% Mwst. Wir möchten alle Teilnehmer bitten, den Betrag in bar mitzubringen. Anmeldung Da wir nur 25 Personen in dem angemieteten Raum empfangen können, möchten wir bitten, sich vorher anzumelden. *Meeting Anmeldung* bitte per Meetup <https://www.meetup.com/Python-Meeting-Dusseldorf/> Weitere Informationen Weitere Informationen finden Sie auf der Webseite des Meetings: https://pyddf.de/ Viel Spaß ! -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Experts (#1, Jan 09 2025) >>> Python Projects, Coaching and Support ... https://www.egenix.com/ >>> Python Product Development ... https://consulting.egenix.com/ ________________________________________________________________________ ::: We implement business ideas - efficiently in both time and costs ::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 https://www.egenix.com/company/contact/ https://www.malemburg.com/

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ANN: Happy 2025 with DIPY 1.10.0 💥
by Eleftherios Garyfallidis Jan. 7, 2025

Jan. 7, 2025

Hello and Happy 2025 to all !, We are excited to announce a new release of DIPY: DIPY 1.10.0 ! DIPY 1.10.0 (Friday, 12 December 2024) The release 1.10.0 received contributions from 28 developers (the full release notes are at: https://docs.dipy.org/stable/release_notes/release1.10.html). Thank you all for your contributions and feedback! Please click here <https://docs.dipy.org/stable/api_changes.html#dipy-1-10-0-changes> to check 1.10.0 API changes. Highlights of 1.10.0 release include: - NF: Patch2Self3 - Memory less denoising for dMRI is now available. - NF: Fiber density and spread from ODF using Bingham distributions method added. - NF: Iteratively reweighted least squares for robust fitting of diffusion models added. - NF: NDC - Neighboring DWI Correlation quality metric added. - NF: DAM - DWI-based tissue classification method added. - NF: New Parallel Backends (Ray, Joblib, Dask) for fitting reconstruction methods added. - RF: Deprecation of Tensorflow support. PyTorch support is now the default. - Transition to Keyword-only arguments (PEP 3102). - Zero-warnings policy (CIs, Compilation, doc generation) adopted. - Adoption of ruff for automatic style enforcement. - Transition to using f-strings. - Citation system updated. It is more uniform and robust. - Multiple Workflows updated. - Multiple DIPY Horizon features updated. - Large documentation update. - Closed 258 issues and merged 187 pull requests. To upgrade or install <http://dipy.org/release0.10.html> DIPY Run the following command in your terminal: <http://dipy.org/release0.10.html> pip install --upgrade dipy This version of DIPY depends on nibabel (3.0.0+). For visualization you need FURY (0.12.0+). Questions or suggestions? For any questions go to https://dipy.org, or send an e-mail to dipy(a)python.org We also have an instant messaging service and chat room available at https://gitter.im/dipy/dipy Finally, a new forum is available at https://github.com/dipy/dipy/discussions Have a wonderful time using the new version. In addition, registration for the online DIPY workshop 2025 (March 17-21) is open! The workshop will equip you with the skills and knowledge needed to master the latest techniques and tools in structural and diffusion imaging. See the exquisite program and keynote speakers here <https://workshop.dipy.org>. Register today to save a spot! Please support us by citing DIPY in your papers using the following DOI: 10.3389/fninf.2014.00008 <https://www.ncbi.nlm.nih.gov/pubmed/24600385> On behalf of the DIPY developers, Eleftherios Garyfallidis, Ariel Rokem, Serge Koudoro https://dipy.org/contributors

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ANN: A new version (0.5.4) of python-gnupg has been released.
by Vinay Sajip Jan. 7, 2025

Jan. 7, 2025

What Changed?============= This is an enhancement and bug-fix release, and all users are encouraged to upgrade. Brief summary: * Fix #242: Handle exceptions in the `on_data` callable. This release [2] has been signed with my code signing key: Vinay Sajip (CODE SIGNING KEY) <vinay_sajip at yahoo.co.uk> Fingerprint: CA74 9061 914E AC13 8E66 EADB 9147 B477 339A 9B86 Recent changes to PyPI don't show the GPG signature with the download links. An alternative download source where the signatures are available is at [4]. The source code repository is at [1]. Documentation is available at [5]. As always, your feedback is most welcome (especially bug reports [3], patches and suggestions for improvement, or any other points via this group). Enjoy! Cheers Vinay Sajip [1] https://github.com/vsajip/python-gnupg [2] https://pypi.org/project/python-gnupg/0.5.4 [3] https://github.com/vsajip/python-gnupg/issues [4] https://github.com/vsajip/python-gnupg/releases/ [5] python-gnupg - A Python wrapper for GnuPG

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Re: How to manage accented characters in mail header?
by Chris Green Jan. 6, 2025

Jan. 6, 2025

Stefan Ram <ram(a)zedat.fu-berlin.de> wrote: > Chris Green <cl(a)isbd.net> wrote or quoted: > >From: =?utf-8?B?U8OpYmFzdGllbiBDcmlnbm9u?= <sebastien.crignon(a)amvs.fr> > > In Python, when you roll with decode_header from the email.header > module, it spits out a list of parts, where each part is like > a tuple of (decoded string, charset). To smash these decoded > sections into one string, you’ll want to loop through the list, > decode each piece (if it needs it), and then throw them together. > Here’s a straightforward example of how to pull this off: > > from email.header import decode_header > > # Example header > header_example = \ > 'From: =?utf-8?B?U8OpYmFzdGllbiBDcmlnbm9u?= <sebastien.crignon(a)amvs.fr>' > > # Decode the header > decoded_parts = decode_header(header_example) > > # Kick off an empty list for the decoded strings > decoded_strings = [] > > for part, charset in decoded_parts: > if isinstance(part, bytes): > # Decode the bytes to a string using the charset > decoded_string = part.decode(charset or 'utf-8') > else: > # If it’s already a string, just roll with it > decoded_string = part > decoded_strings.append(decoded_string) > > # Join the parts into a single string > final_string = ''.join(decoded_strings) > > print(final_string)# From: Sébastien Crignon <sebastien.crignon(a)amvs.fr> > > Breakdown > > decode_header(header_example): This line takes your email header > and breaks it down into a list of tuples. > > Looping through decoded_parts: You check if each part is in > bytes. If it is, you decode it using whatever charset it’s > got (defaulting to 'utf-8' if it’s a little vague). > > Appending Decoded Strings: You toss each decoded part into a list. > > Joining Strings: Finally, you use ''.join(decoded_strings) to glue > all the decoded strings into a single, coherent piece. > > Just a Heads Up > > Keep an eye out for cases where the charset might be None. In those > moments, it’s smart to fall back to 'utf-8' or something safe. > Thanks, I think! :-) Is there a simple[r] way to extract just the 'real' address between the <>, that's all I actually need. I think it has the be the last chunk of the From: doesn't it? -- Chris Green ·

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How to manage accented characters in mail header?
by Chris Green Jan. 4, 2025

Jan. 4, 2025

I have a Python script that filters my incoming E-Mail. It has been working OK (with various updates and improvements) for many years. I now have a minor new problem when handling E-Mail with a From: that has accented characters in it:- From: Sébastien Crignon <sebastien.crignon(a)amvs.fr> I use Python mailbox to parse the message:- import mailbox ... ... msg = mailbox.MaildirMessage(sys.stdin.buffer.read()) Then various mailbox methods to get headers etc. I use the following to get the From: address:- str(msg.get('from', "unknown").lower() The result has the part with the accented character wrapped as follows:- From: =?utf-8?B?U8OpYmFzdGllbiBDcmlnbm9u?= <sebastien.crignon(a)amvs.fr> I know I have hit this issue before but I can't rememeber the fix. The problem I have now is that searching the above doesn't work as expected. Basically I just need to get rid of the ?utf-8? wrapped bit altogether as I'm only interested in the 'real' address. How can I easily remove the UTF8 section in a way that will work whether or not it's there? -- Chris Green ·

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Re: Add the numbers in a 9x9 multiplication Table
by Kaz Kylheku Jan. 3, 2025

Jan. 3, 2025

On 2025-01-03, HenHanna <HenHanna(a)dev.null> wrote: > On Thu, 2 Jan 2025 10:54:02 +0000, yeti wrote: > >> https://oeis.org/A000537 ? > > Sum of first n cubes; or n-th triangular number squared. > > 0, 1, 9, 36, 100, 225, 441, 784, 1296, 2025, 3025, 4356, 6084, 8281, > 11025, 14400, 18496, 23409, 29241, 36100, 44100, 53361, 64009, 76176, > 90000, 105625, 123201, 142884, 164836, 189225, 216225, 246016, 278784, > 314721, 354025, 396900, 443556, 494209, 549081 > > > > Thank you... It's not obvous to me why > > Sum of (consecutive) cubes would be a Square number. Base case: 1^3 is a square number. Inductive hypothesis: Suppose that the sums of 1^3 through n^3 are a square number. What happens when we add (n+1)^3? In other words: sum{1, n, n^3} = k * k (for some positive integer k) What are we adding to this k * k? (n+1)^3 = n^3 + 3n^2 + 3n + 1 We have to show that adding this forumla to some k * k produces (k + m) * (k + m) for some positive integer m. When we take a k * k square and add m to the edges, we get k^2 + 2km + m^2. In other words, the newly added area beyond the original k^2 consists of two k * m quadrangles and an m^2 square. Thus, it follows that the (n+1)^3 formula must be expressible in this form: 2km + m^2. Each successive cube must be adding area to a previous k*k square to make a larger square, by adding m to the edge, which results in an new additional area of 2km + m^2. (Of course the k and m are different for each new cube.) n^3 + 3n^2 + 3n + 1 = m^2 + 2km For instance, 27 is equal to { k = 3, m = 3 } 3^2 + 2*3*3. On in the n = 7 case, 441 going to 784 (+ 343) we have { k = 21, m = 7 }: 343 = 7*7*7 = 7*7 + 2*21*7 A pattern is emerging that m is the root of the cube; in other words that m = n + 1. Thus: n^3 + 3n^2 + 3n + 1 = (n+1)^2 + 2k(n + 1) n^3 + 3n^2 + 3n + 1 = n^2 + 2n + 1 + 2k(n + 1) Get k by itself: n^3 + 2n^2 + 3n + 1 = 2n + 1 + 2k(n + 1) n^3 + 2n^2 + n + 1 = 1 + 2k(n + 1) n^3 + 2n^2 + n = 2k(n + 1) n^3 + 2n^2 + n = 2k ------ n + 1 We need to do long polynomial division to work out this fraction on the left: n^2 + n _____________________ n + 1 | n^3 + 2n^2 + n + 0 n^2 + n^2 ---------- n^2 + n + 0 n^2 + n --------- 0 + 0 This is the key: the division is exact! 2k = n^2 + n = n(n + 1) k = n(n + 1)/2 which we know is an integer! So we know that each new cube (n+1)^3 is expressible in the form of: m^2 + 2km if we identify k, m as: m = n + 1, and k = n(n + 1)/2 . What we have to show is that k is the correct square value. If k is the correct original square, then we have proved it; because k^2 + 2m is the correct quantity to take the k square to the k + m square. We could use a separate, parallel induction to prove this. Note that the formula k = n(n + 1)/2 is just the summation formula for consecutive integers from 1 to n. We can prove that the successive squares in the squares of these sums: sum(1..1)^2 = 1 sum(1..2)^2 = 3^2 = 9 sum(1..3)^2 = 6^2 = 36 sum(1..4)^2 = 10^2 = 100 So it's obvious by inspection that we have the correct k formula, and we can prove it more formally. Conclusion: Since we have a base case, and true inductive hypothesis, the result holds for all n. The key insights are that 1. the sequence values are the squares of consecutive integer sums; i.e. the squares of successive k-s, where k = n(n+1)/2. 2. each cube value added to the previous sequence value is expressible in the form m^2 + 2km, which has the right shape to preserve the square property, and that with some algebra we can identify m as m = n + 1. -- TXR Programming Language: http://nongnu.org/txr Cygnal: Cygwin Native Application Library: http://kylheku.com/cygnal Mastodon: @Kazinator@mstdn.ca

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Re: it's a shame... python error over error
by aotto1968 Jan. 3, 2025

Jan. 3, 2025

On 30.12.24 18:29, Michael Torrie wrote: > On 12/26/24 12:34 AM, aotto1968 via Python-list wrote: >> sorry you don't understand the problem… >> >> > You managed to make a build of Python that attempts to link to a DLL >> >> I never touch the OpenSUSE python. the OpenSUSE python try to use my >> sqalite3. > > The *only* mechanism that would cause the system python binary to try to > load modules and libraries from your local install is your environment > (environment variables). > that is right because MY environment variable point to MY local user stuff. The CORE problem is that OpenSUSE (Linux) python use MY env. If I call a OS feature like "cnf" this should NOT interact with my private user stuff. the OpenSUSE do it right because OpenSUSE use /usr/bin/python in "cnf" BUT the python think to interact with MY env. To make it short: The OS python will NEVER proper work if LOCAL user stuff is used.

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No module name mutagen
by Tim Johnson Jan. 1, 2025

Jan. 1, 2025

Please let me grumble for a minute : I've been using python since before 1. 5, when I could email Guido van Rossum directly with questions and on at least one occasion we swapped stories about our cats. I put six kids though college writing python, and now after being retired for ten years, I get my butt kicked by python dependencies every time I upgrade ubuntu. (I'm newly on 24.04) now. Now, after three weeks on using the following code correctly: from mutagen import mp3, id3, File as mutaFile from mutagen.id3 import ID3, TIT2, TPE1 I am as of today, getting an import error for mutagen. Mutagen package is installed at /root/.local/share/pipx/shared/lib/python3.12/site-packages and indeed, that is the content of /root/.local/share/pipx/shared/lib/python3.12/site-packages/pipx_shared.pth I have added that to my path and am still getting the error. Grrr... I am at a loss. don't know what to do. I am only using python script for command line utilities on my desktop and local network. Must I be using a virtual environment? If so, I would be happy to set one up if I am given the python-approved directions (lots of conflicting info out there....) Thanks Tim

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