🌐 Mailman 3 December 2019 - Python-list - python.org

Cython, producing different modules from the same .pyx
by Lele Gaifax Dec. 20, 2019

Dec. 20, 2019

Hi all, in my package, I would like to compile and distribute two different extension modules starting from the same .pyx file, just with different compilation flags and libraries. My first approach has been duplicating the Extension() entry in the setup.py(*), changing the first argument (that is, the name of the module). Although that did produce the alternative binary module, it could not be loaded because it contains the wrong PyInit_XXX(), where XXX is computed from the .pyx name, in my case "parser". I tried looking at Cython documentation, and even its sources, but couldn't find a way to alter that name. Did I miss something, or is the only way to duplicate the source .pyx file to a different name? Thanks in advance, ciao, lele. (*) https://github.com/lelit/pglast/blob/master/setup.py#L76 -- nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia. lele(a)metapensiero.it | -- Fortunato Depero, 1929.

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Re: Cython, producing different modules from the same .pyx
by Greg Ewing Dec. 20, 2019

Dec. 20, 2019

On 20/12/19 2:16 am, Lele Gaifax wrote: > My first approach has been duplicating the Extension() entry in the > setup.py(*), changing the first argument (that is, the name of the module). > Although that did produce the alternative binary module, it could not be > loaded because it contains the wrong PyInit_XXX(), where XXX is computed from > the .pyx name, You could try creating a set of top-level .pyx stubs, each of which just 'include' the real code. -- Greg

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Re: [HN] How to Make Python Wait
by p4j＠j4d.net Dec. 20, 2019

Dec. 20, 2019

>> https://news.ycombinator.com/item?id=21834408 > Did you just post a blog article, then spam everywhere to try to get > traffic, where your entire blog post is telling people worse ways to > do a time.sleep()? Blog post is not mine. I have a habit of posting good things to HN. When I got notification that it is getting good traction, people are discussing, then I posted the discussion link here. If that is not liked here then I won't post again.

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How to improve epoll speed when recv from kernel via netlink?
by lampahome Dec. 20, 2019

Dec. 20, 2019

I tried to receive msg from kernel via netlink of socket. And I use epoll to receive netlink events whenever it comes from kernel to user space. But I found the performance is poor e.g. epoll costs 90% time of execution time after I profile it by cProfile module. Are there any tips to improve this?

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[HN] How to Make Python Wait
by Pankaj Jangid Dec. 20, 2019

Dec. 20, 2019

https://news.ycombinator.com/item?id=21834408

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Re: INHERITANCE in python3
by Pieter van Oostrum Dec. 19, 2019

Dec. 19, 2019

Random832 <random832(a)fastmail.com> writes: > On Wed, Dec 18, 2019, at 23:10, vahid asadi via Python-list wrote: >> HI guys this is my first post on python mailing lists ever and i glad >> to do this. >> my problem here is why this attribute is not recognize by python and it >> raise an traceback error that said 'there is no such p.family >> attribute'. although i use multiple inheritance with 'super ' it not >> works. thanks for your help. >> >> ``` class Username: def __init__(self,name,*args): self.name >> = name >> class Userfamily: def __init__(self,family,*args): >> self.family = family >> class Person(Username,Userfamily): def __init__(self,*args): >> super().__init__(*args) >> >> >> p = Person("v","aaa")print(p.name)print(p.family)``` Please next time, supply a properly indented Python source, with only normal ASCII spaces, not no-break spaces, i.e. exactly like in your Python source code. > > The Username class also needs to call super(). In general, super() is > intended to be used with all classes that might be part of a multiple > inheritance hierarchy, not just the derived one. Just for safety, also add it to the Userfamily class. -- Pieter van Oostrum www: http://pieter.vanoostrum.org/ PGP key: [8DAE142BE17999C4]

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Re: hexdump module installation error
by Pieter van Oostrum Dec. 19, 2019

Dec. 19, 2019

tommy yama <bluebox03(a)gmail.com> writes: > user@USERnoMacBook-Air LibraBrowser % python3 hexdump.py > > /usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/Resources/Python.app/Contents/MacOS/Python: > can't open file 'hexdump.py': [Errno 2] No such file or directory > > user@USERnoMacBook-Air LibraBrowser % Could it be that your pip3 belongs to a different Python than the one above (for example a Python 3.8 or 3.6)? What is the output of 'pip3 --version' (without quotes)? -- Pieter van Oostrum www: http://pieter.vanoostrum.org/ PGP key: [8DAE142BE17999C4]

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hexdump module installation error
by tommy yama Dec. 19, 2019

Dec. 19, 2019

Hi, This sounds familiar to somebody? After upgrading my mac OS to Catalina, this persists even after pip3 install hexdump. [image: image.png] thanks.

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How to specific multiple dtypes in numpy.ndarray?
by lampahome Dec. 19, 2019

Dec. 19, 2019

I meet performance is low when I use struct.unpack to unpack binary data. So I tried to use numpy.ndarray But meet error when I want to unpack multiple dtypes Can anyone teach me~ Code like below: # python3 import struct import numpy as np s1 = struct.Struct("@QIQ") ss1 = s1.pack(1,11,111) np.ndarray((3,), [('Q','I','Q')], ss1) # ValueError: mismatch in size of old and new data-descriptor.

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[RELEASE] Python 3.8.1, 3.7.6, 3.6.10, and 3.9.0a2 are now available!
by Łukasz Langa Dec. 19, 2019

Dec. 19, 2019

from locale import seasons_greetings seasons_greetings() On behalf of the entire Python development community, and the currently serving Python release team in particular, I'm pleased to announce the unprecedented combined release of no less than four versions of Python. Let's dig in! Python 3.8.1 Python 3.8.1 is the first maintenance release of Python 3.8. The Python 3.8 series is the newest feature release of the Python language, and it contains many new features and optimizations. You can find Python 3.8.1 here: https://www.python.org/downloads/release/python-381/ <https://www.python.org/downloads/release/python-381/> See the “What’s New in Python 3.8 <https://docs.python.org/3.8/whatsnew/3.8.html>” document for more information about features included in the 3.8 series. Detailed information about all changes made in 3.8.1 can be found in its change log <https://docs.python.org/release/3.8.1/whatsnew/changelog.html#changelog>. Maintenance releases for the 3.8 series will continue at regular bi-monthly intervals, with 3.8.2 planned for February 2020. Python 3.7.6 Python 3.7.6, the next bugfix release of Python 3.7, is also available. You can find the release files, a link to the change log, and more information here: https://www.python.org/downloads/release/python-376/ <https://www.python.org/downloads/release/python-376/> Python 3.9.0a2 An early developer preview of Python 3.9 is also ready: https://www.python.org/downloads/release/python-390a2/ <https://www.python.org/downloads/release/python-390a2/> Python 3.9 is still in development. This releasee, 3.9.0a2 is the second of six planned alpha releases. Alpha releases are intended to make it easier to test the current state of new features and bug fixes and to test the release process. During the alpha phase, features may be added up until the start of the beta phase (2020-05-18) and, if necessary, may be modified or deleted up until the release candidate phase (2020-08-10). Please keep in mind that this is a preview release and its use is not recommended for production environments. Python 3.6.10 And, one more thing: Python 3.6.10, the next security fix release of Python 3.6, is also available: https://www.python.org/downloads/release/python-3610/ <https://www.python.org/downloads/release/python-3610/> We hope you enjoy all those! Thanks to all of the many volunteers who help make Python Development and these releases possible! Please consider supporting our efforts by volunteering yourself or through organization contributions to the Python Software Foundation. https://www.python.org/psf/ <https://www.python.org/psf/> Your friendly release team, Ned Deily Steve Dower Łukasz Langa

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