🌐 Mailman 3 December 2021 - Python-list - python.org

What's the public API alternative to _PyObject_GC_IS_TRACKED()?
by Marco Sulla Dec. 29, 2021

Dec. 29, 2021

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?

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Option for venv to upgrade pip automatically?
by Marco Sulla Dec. 29, 2021

Dec. 29, 2021

I think it's very boring that, after creating a venv, you have immediately to do every time: pip install -U pip Can't venv have an option for doing this automatically or, better, a config file where you can put commands that will be launched every time after you create a venv?

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PIP Certificate problem
by Aniket Dec. 27, 2021

Dec. 27, 2021

Hi there, System Specs: Edition Windows 11 Home Single Language Version 21H2 OS build 22000.376 Experience Windows Feature Experience Pack 1000.22000.376.0 Processor Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz 1.80 GHz Installed RAM 8.00 GB (7.89 GB usable) System type 64-bit operating system, x64-based processor I am repeatedly facing this issue while installing ANY pip module: PS D:\Documents\GitHub\mysite> pip install flask WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:997)'))': /simple/flask/ WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:997)'))': /simple/flask/ WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:997)'))': /simple/flask/ WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:997)'))': /simple/flask/ WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:997)'))': /simple/flask/ Could not fetch URL https://pypi.org/simple/flask/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/flask/ (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:997)'))) - skipping ERROR: Could not find a version that satisfies the requirement flask (from versions: none) ERROR: No matching distribution found for flask I have reinstalled python, and repaired but no help at all. My version of Python is 3.10.1 Thank You Aniket Patra

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recover pickled data: pickle data was truncated
by iMath Dec. 26, 2021

Dec. 26, 2021

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 corrupted it. Is there any way to recover all data in it ? Currently I just get "pickle data was truncated" exception after reading a portion of the data? Data and code here :https://drive.google.com/file/d/137nJFc1TvOge88EjzhnFX9bXg6vd0RYQ/view?usp=sharing

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Uninstall old python version(Python 3.9.7)
by Công Huy Dec. 26, 2021

Dec. 26, 2021

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 if it defaulted my main Python version on my computer and I can't use some libraries I installed like numpy, matplotlib, networkx,... To solve my python homework. I found some help on the internet but it wasn't improved. I don't know how to fix it. Please help me. Thanks and Regards, Cong Huy Sent from [1]Mail for Windows References Visible links 1. https://go.microsoft.com/fwlink/?LinkId=550986

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Isn't TypeError built in?
by Mike Dewhirst Dec. 25, 2021

Dec. 25, 2021

Obviously something is wrong elsewhere but I'm not sure where to look. Ubuntu 20.04 with plenty of RAM. def __del__(self): try: for context_obj in self._context_refs: try: delattr(context_obj, self._attr_name) except AttributeError: pass except TypeError: # THIS IS LINE 96 IN THE APACHE2 ERROR LOG BELOW # WeakSet.__iter__ can crash when interpreter is shutting down due # to _IterationGuard being None. pass [Mon Dec 13 01:15:49.875993 2021] [mpm_event:notice] [pid 1033:tid 140446449658944] AH00493: SIGUSR1 received. Doing graceful restart [Mon Dec 13 01:15:49.878443 2021] [so:warn] [pid 1033] AH01574: module dav_module is already loaded, skipping [Mon Dec 13 01:15:49.885659 2021] [mpm_event:notice] [pid 1033:tid 140446449658944] AH00489: Apache/2.4.41 (Ubuntu) SVN/1.13.0 OpenSSL/1.1.1f mod_wsgi/4.6.8 Python/3.8 configured -- resuming normal operations [Mon Dec 13 01:15:49.885664 2021] [core:notice] [pid 1033:tid 140446449658944] AH00094: Command line: '/usr/sbin/apache2' Exception ignored in: <function Local.__del__ at 0x7fbc380964c0> Traceback (most recent call last): File "/usr/local/lib/python3.8/dist-packages/asgiref/local.py", line 96, in __del__ NameError: name 'TypeError' is not defined Exception ignored in: <function Local.__del__ at 0x7fbc380964c0> Traceback (most recent call last): File "/usr/local/lib/python3.8/dist-packages/asgiref/local.py", line 96, in __del__ NameError: name 'TypeError' is not defined Any hints welcome ... Thanks Mike -- Signed email is an absolute defence against phishing. This email has been signed with my private key. If you import my public key you can automatically decrypt my signature and be sure it came from me. Just ask and I'll send it to you. Your email software can handle signing.

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email.message_from_file & quoted printable
by Skip Montanaro Dec. 25, 2021

Dec. 25, 2021

I have a bunch of old email archives I'm messing around with, for example, rendering them on-demand in HTML. Some of the files use quoted printable content transfer encoding. Here's one (with a number of headers elided): >From classicrendezvous-admin Mon Dec 4 15:29:22 2000 Message-ID: <027801bfcdaa$fa175230$268cbcd4@stewart> Reply-To: "Stewart Barrie" <sbarrie(a)bellefield.worldonline.co.uk> From: "Stewart Barrie" <sbarrie(a)bellefield.worldonline.co.uk> To: <Classicrendezvous(a)bikelist.org> Date: Sat, 3 Jun 2000 23:28:00 +0100 MIME-Version: 1.0 X-StripMime: Non-text section removed by stripmime Content-Transfer-Encoding: quoted-printable Content-Type: text/plain;charset="iso-8859-1" Subject: {ClassicRend]Frame dent Just inherited a nice 531 Claud Butler from the 60's I think. No = eylelets and pencil stays. Unfortunately there is nice dent in the = middle of the seat tube just above front mech clip height. Otherwise it = seems fine.=20 Any thoughts on restoration? Are there any techniques for fixing dents = in situ (I can hear the screams already) or are we definitely looking at = a new seat tube? In which case, is it worth it? Cheers Stewart --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html --- This message is stored in a file. I read it using email.message_from_file. In the example above, the payload still retains the quoted printable bits. Maybe it's not correctly encoded (no "=20" at the end of the second paragraph, for example), but I would have thought the email package would do what it could to decode things, but nope: >>> print(msg.get_payload()) Just inherited a nice 531 Claud Butler from the 60's I think. No = eylelets and pencil stays. Unfortunately there is nice dent in the = middle of the seat tube just above front mech clip height. Otherwise it = seems fine.=20 Any thoughts on restoration? Are there any techniques for fixing dents = in situ (I can hear the screams already) or are we definitely looking at = a new seat tube? In which case, is it worth it? Cheers Stewart --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html --- Am I expecting too much from the email package when munching on crufty 20+yo archived email messages? Thx, Skip

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Uninstall old python version(Python 3.9.7)
by Công Huy Dec. 24, 2021

Dec. 24, 2021

I uninstalled Python 3.9.7 but I can't delete completely. And I received a notification "no Python 3.9 was detected". Of course, it won't be an issue if it defaulted my python version on my computer and it makes me can't use some libraries I installed before like numpy, matplotlib and network to solve my homework. I don't know how to fix it. Help me, please. Sent from [1]Mail for Windows References Visible links 1. https://go.microsoft.com/fwlink/?LinkId=550986

1 0

Is there any way to make sense of these E-Mail subjects?
by Chris Green Dec. 24, 2021

Dec. 24, 2021

I have a Python 3 script which processes E-Mail caught in my hosting provider's 'catchall' mailbox. It looks for things that *might* be useful E-Mails, forwards them, and throws the rest away. I have a function which, given a header name, extracts the header and returns it as a string:- # # # Get a message header as a string # def getHdr(msg, header): return str("\n " + header + ": " + str(msg.get(header, "empty"))) msg is a mailbox.mboxMessage object. This is mostly working as expected, returning the header contents as strings so I can output them to my log files as necessary. However some Subject: lines are being returned like the following:- Subject: [SPAM] =?UTF-8?B?8J+TtyBKb2huIEJheHRlci1C?= =?UTF-8?B?cm93biByZWNlbnRseSBw?= =?UTF-8?B?b3N0ZWQgYSBuZXcgcGhv?= =?UTF-8?B?dG8=?= It looks like some sort of mis-encoding of UTF-8 strings, can anyone suggest what might be going on and/or a way to get some sense out of this? FWIW the above example is from "Facebook" <friendupdates(a)facebookmail.com> so while it is probably (as indicated) [SPAM] it shouldn't be so illegible. At the moment I can't see an easy way to actually inspect the message as it's disappeared off somewhere else. I guess I could add some code to the script to send it to myself as well but if there's something obvious in the above it would avoid having to do this. -- Chris Green ·

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Selection sort
by vani arul Dec. 24, 2021

Dec. 24, 2021

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 arr[b]>arr[a+1]: arr[b],arr[a+1]=arr[a+1],arr[b] return arr arr=[3,5,9,8,2,6] print(selectionsort(arr))

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