Re: If you have Python Cookbook, 3rd ed.
On 5/19/2021 2:57 PM, Terry Reedy wrote: can you verify that the Algorithm chapter (near end in 2nd ed.) does *NOT* have an introduction by Tim Peters? (Info needed to verify timeit doc correction https://github.com/python/cpython/pull/21744) Thank you to 2 respondents. I have gone ahead with the patch. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: Use Chrome's / Firefox's dev-tools in python
On Sat, May 22, 2021 at 3:55 AM max pothier wrote: > > Hello, > Thanks for you answer! > Actually my goal is not to automatically get the file once I open the page, > but more to periodically check the site and get a notification when there's > new homework or, at the morning, know when an hour is cancelled, so I don't > want to have to open the browser every time. > I have pretty good javascript knowledge so if you could better explain that > idea, it would be a great help. > Ahh, now I better understand your purpose. Hmm. First and by far the best option would be to see if there's any sort of (documented or undocumented) API. See if you can figure out how the requests are being done, and try to find a pre-request request that is hinting at the download address. (You might have to do some exploration here.) Secondly, it may be possible to do an occasional manual check, but then keep your login cookie alive by periodic queries by your automated script. No idea how well that would work. Third, your worst case might be to do most of the work in JavaScript, maybe as a Chrome extension, but then have it call a Python script (via an HTTP request, since that's how JavaScript in a browser can best notify anything) to do whatever extra work you need Python for. Not sure how well that would work. Unfortunately it depends a LOT on the homework server you're working with, so it's hard to be specific. On the plus side, though, you're going to learn all kinds of things along the way! Or maybe that's another downside, depending on how Daily WTF-worthy the site is ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Instantiating abstract classes
Usually an abstract class cannot be instantiated: >>> from abc import ABCMeta, abstractmethod >>> from fractions import Fraction >>> class A(Fraction, metaclass=ABCMeta): @abstractmethod def frobnicate(self): pass >>> A() Traceback (most recent call last): File "", line 1, in A() File "C:\Program Files\Python39-32\lib\fractions.py", line 93, in __new__ self = super(Fraction, cls).__new__(cls) TypeError: Can't instantiate abstract class A with abstract method frobnicate However, if I derive from a builtin class that mechanism doesn't work: >>> class A(int, metaclass=ABCMeta): @abstractmethod def frobnicate(self): pass >>> A() 0 Is this a bug, or an implementation accident, or the expected behavior? -- https://mail.python.org/mailman/listinfo/python-list
Re: Use Chrome's / Firefox's dev-tools in python
Hello, Thanks for you answer! Actually my goal is not to automatically get the file once I open the page, but more to periodically check the site and get a notification when there's new homework or, at the morning, know when an hour is cancelled, so I don't want to have to open the browser every time. I have pretty good javascript knowledge so if you could better explain that idea, it would be a great help. -- https://mail.python.org/mailman/listinfo/python-list
Re: If you have Python Cookbook, 3rd ed.
On 2021-05-19, Terry Reedy wrote: > can you verify that the Algorithm chapter (near end in 2nd ed.) does > *NOT* have an introduction by Tim Peters? > (Info needed to verify timeit doc correction > https://github.com/python/cpython/pull/21744) Preface .. xi 1.Data Structure adn Algorithms.1 1.1 Unpacking a Sequence into Separate Variables1 1.2 Unpacking Elements from Iterables of Arbitrary Lenght 3 1.2 Keeping the Last N items5 1.3 Finding the Largest or Smallest N itemst7 Third Edition. -- https://mail.python.org/mailman/listinfo/python-list
Python at SpaceX
https://stackoverflow.blog/tag/software-in-space/ has 4 links to interviews. 2 specifically mention Python. https://stackoverflow.blog/2021/05/11/testing-software-so-its-reliable-enough-for-space/ "Python “is for backend test running, build orchestration, and all our web servers are python-based. It’s a lot of little scripts and a lot of big web services. " https://stackoverflow.blog/2021/05/11/building-a-space-based-isp/ "Starlink software, both in satellites and on the ground, is written almost exclusively in C++, with some prototyping development in Python." “For development and test of these algorithms, we have a full-scale network simulation running in continuous integration on a high-performance computing cluster. This simulation is capable of running the C++ production code as well as running against prototype code written in Python,” -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: Unexpected Inheritance Problem
On 2021-05-20, Terry Reedy wrote: > On 5/20/2021 2:53 PM, Grant Edwards wrote: >> On 2021-05-20, Mats Wichmann wrote: >> >>> many fonts squish together repeated underscores in the display so it's >>> hard to see this visually, >> >> Is it just me, or does it seem foolish to use such fonts for >> editing/browsing source code... > > Windows [...] Ah, I think I see the underlying problem. ;) -- Grant -- https://mail.python.org/mailman/listinfo/python-list
Re: Python install failing. Install log is available.
On 5/21/21 8:25 AM, Mats Wichmann wrote: > An install for all users will drop it into someplace different - by > default at the top of the drive, so e.g. C:\Python39. I just did an install of 3.9 on Windows 10. There was an option to install the launcher for all users but no option for installing Python for all users if you go through with the default install options. When I chose to install the launcher for all users, it still installed Python in the my user local AppData... path. In order to select to install for all users, I had to choose custom options during the install. Then I could choose to install for all users, and it let me select a path which defaulted to C:\Program Files\Python39. As well I selected to place Python in the path, which it did. -- https://mail.python.org/mailman/listinfo/python-list
Re: Python install failing. Install log is available.
On 5/21/21 4:21 AM, jan via Python-list wrote: OK, but 1. should the installer work for administrator + all users or not? 2. if not, should the installer work for me (a non-admin) and install python correctly and successfully for my account if I run it in my account, not the admin? It should, and for many, it does. An ordinary install, not "for all users", defaults to your own AppData\Local\Programs\Python - the pattern you see in your Administrator install. So you don't seem to have installed that one for all users. I don't think you want to do a user-install using the administrator account. If you tell it to add to PATH, I believe it adds to the user variables in this case, so other accounts won't see that. The Python launcher should help with this part of the problem, as Terry said, but only if other users are able to work with things installed in admin's account-local locations. An install for all users will drop it into someplace different - by default at the top of the drive, so e.g. C:\Python39. -- https://mail.python.org/mailman/listinfo/python-list
Re: Python install failing. Install log is available.
OK, but 1. should the installer work for administrator + all users or not? 2. if not, should the installer work for me (a non-admin) and install python correctly and successfully for my account if I run it in my account, not the admin? thanks jan On 20/05/2021, Terry Reedy wrote: > On 5/20/2021 7:06 AM, jan via Python-list wrote: > >> This time it's simply not installing correctly when run as >> administrator, and not at all when run as non-administrator. >> >> As administrator, it's not installing for other users as I believe it >> should. >> >> It's certainly not adding the python path correctly *for all users* > >> C:\WINDOWS\system32>whoami > ... >> Any thoughts? > > On Windows, use the py launcher to launch python. It was added as the > solution to problems with adding python paths, including problems with > multiple installs and those with removing them. > > > -- > Terry Jan Reedy > > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
