Re: use set notation for repr of dict_keys?

On 20/02/2021 20.25, Wolfgang Stöcher wrote: > Having a dict like >   d = {'one': 1, 'two': 2} > the representation of its keys >   repr(d.keys()) > gives >   "dict_keys(['one', 'two'])" > > But since the keys are unique, wouldn't a representation using the set > notation > be more intuitive, i.e.

Re: Is there a way to subtract 3 from every digit of a number?

On 21/02/2021 06.02, jak wrote: > Il 20/02/2021 15:40, C W ha scritto: >> Hello everyone, >> >> I'm curious if there is a way take number and back each digit by 3 ? >> >> 2342 becomes 9019 >> 8475 becomes 5142 >> 5873 becomes 2540 >> >> The tricky part is that 2 becomes 9, not -1. >> >> Here's my t

Re: Deleting Python 3.8.5

On 23/02/2021 08.00, Vinicius Costa Marques wrote: > Hello there Python team, I’m having this problem were I installed Python > 3.9.2 and then went to unistall 3.8.5 but here is the problem the version > 3.8.5 dosen’t get deleted properly. The uninstall program says that > everything worked but

Re: program python

Hi, and welcome to the list. On 05/03/2021 09.36, alberto wrote: > Hi I'm tring to write a program with python to evaluate data of csv data > In particular I would extract this information > > View data on the presence of men and women in Affori over time. > > * Carry out an analysis relating t

Re: Apriori Algorithm

On 07/03/2021 20.56, sarang shah wrote: > I have this dataset in a text file I need to make an apriori algorithm based > on it. Please help. > > 25 52 164 240 274 328 368 448 538 561 630 687 730 775 825 834 > 39 120 124 205 401 581 704 814 825 834 > 35 249 674 712 733 759 854 950 > 39 422 449

Re: Found a problem

On 10/03/2021 09.16, Victor Dib wrote: > Olá, comunidade do Python! Olá Victor! At which point we should switch to English, because this is an English-language list. (there may be Portuguese lists - I haven't looked) Please do not be afraid to write in English. There are many here who are quite

Re: Please don't feed the trolls

On 10/03/2021 13.47, Dennis Lee Bieber wrote: > On Tue, 9 Mar 2021 16:57:52 -0600, Sam declaimed the > following: > >> On 3/8/21 3:35 PM, Chris Angelico wrote: >>> On Tue, Mar 9, 2021 at 8:31 AM D'Arcy Cain wrote: On 2021-03-06 4:24 p.m., Terry Reedy wrote: > Trolling, among other

Re: Why assert is not a function?

On 12/03/2021 10.26, Cameron Simpson wrote: > On 12Mar2021 05:31, Chris Angelico wrote: >> On Fri, Mar 12, 2021 at 3:37 AM Serhiy Storchaka wrote: >>> assert(expensive_computation()) >> >> Do you have any asserts like that, or is that a purely theoretical >> complaint? I have never once seen anyt

Friday Finking: following, weirdness with list()

The in-person version of 'Friday Finking' has been set-aside by COVID-precautions. Here's hoping the questions asked below will stimulate some thinking, or mild entertainment... On 02/03/2021 03.10, Grant Edwards wrote: > On 2021-03-01, Greg Ewing wrote: >> On 28/02/21 1:17 pm, Cameron Simpson w

Re: Why assert is not a function?

On 12/03/2021 11.27, Chris Angelico wrote: > On Fri, Mar 12, 2021 at 9:10 AM Ethan Furman wrote: >> >> On 3/11/21 1:45 PM, dn via Python-list wrote: >> >>> Is assert so much faster/cheaper than try...except...raise? >> >> Infinitely faster when they ar

Re: file location/directory

On 15/03/2021 07.44, Quentin Bock wrote: > how can I change the path that python takes to run certain files, I'm > starting to create game and I want those in separate folders, so how can I > change it so that python runs the program with the files from that folder? Perhaps I'm confused: a) are w

Re: file location/directory

On 17/03/2021 02.02, Gys wrote: > On 3/14/21 7:44 PM, Quentin Bock wrote: >> how can I change the path that python takes to run certain files, I'm >> starting to create game and I want those in separate folders, so how >> can I >> change it so that python runs the program with the files from that >

Re: .title() - annoying mistake

On 20/03/2021 07.49, Grant Edwards wrote: > On 2021-03-19, MRAB wrote: >> You want English "man's" to become "Man's", but French "l'homme" to >> become "L'Homme". It's language-dependant. > > In English, certain words are not capitalized in titles unless they're > the first word in the title (sh

Re: .title() - annoying mistake

On 20/03/2021 06.17, Chris Angelico wrote: > On Sat, Mar 20, 2021 at 4:01 AM Abdur-Rahmaan Janhangeer > wrote: >> >> It's about unnecessary capitalisation for a common use case >> in English. >> >> You can see it in action on my site: >> https://www.compileralchemy.com/#articles >> >> see 24. >> >

Re: .title() - annoying mistake

On 23/03/2021 10.00, Avi Gross via Python-list wrote: > Speaking for myself, I am beyond tired of this topic, however informative > parts have been. +1 > I will say it is irrational to try to impose rationally across all possible > languages, let alone people like me who often combine 3 or more

Re: Code Formatter Questions

On 29/03/2021 04.42, Travis Griggs wrote: > I've been looking into using a code formatter as a code base size has grown > as well as contributing developers. I've found and played with autopep, > black, and yapf. As well as whatever pycharm has (which may just be gui > preferences around one of

Re: Code Formatter Questions

On 29/03/2021 23.15, Matt Wheeler wrote: >> On 29 Mar 2021, at 04:45, Cameron Simpson wrote: >> >> yapf has many tunings. Worth a look. It is my preferred formatter. By >> comparison, black is both opinionated and has basicly no tuning, >> something I greatly dislike. > > This is not a mark or

Re: Canonical conversion of dict of dicts to list of dicts

On 31/03/2021 01.22, Loris Bennett wrote: > Jon Ribbens writes: >> On 2021-03-30, Loris Bennett wrote: >>> If I have dict of dicts, say >>> >>> dod = { >>> "alice": >>> { >>> "lang": "python", >>> "level": "expert" >>> }, >>> "bob": >>> { >>>

Re: Canonical conversion of dict of dicts to list of dicts

On 31/03/2021 19.24, Loris Bennett wrote: > dn writes: > >> On 31/03/2021 01.22, Loris Bennett wrote: >>> Jon Ribbens writes: On 2021-03-30, Loris Bennett wrote: > If I have dict of dicts, say > > dod = { > "alice": > { > "lang": "python", >>

Re: Horrible abuse of __init_subclass__, or elegant hack?

On 01/04/2021 12.14, Chris Angelico wrote: > I think this code makes some sort of argument in the debate about > whether Python has too much flexibility or if it's the best > metaprogramming toolset in the world. I'm not sure which side of the > debate it falls on, though. > > class Building: >

Re: Horrible abuse of __init_subclass__, or elegant hack?

On 01/04/2021 13.54, Chris Angelico wrote: > On Thu, Apr 1, 2021 at 11:39 AM dn via Python-list > wrote: >> >> On 01/04/2021 12.14, Chris Angelico wrote: >>> I think this code makes some sort of argument in the debate about >>> whether Python has too

Re: XanaNews Statistic for comp.lang.python. 4/1/2021 5:52:47 AM

On 02/04/2021 01.19, Chris Angelico wrote: > On Thu, Apr 1, 2021 at 10:56 PM The Doctor via Python-list > wrote: >> Top Posters >> >> Ranking Articles NameMost Used Newsreader >> --- -- >> 1 167 Tes

Re: Horrible abuse of __init_subclass__, or elegant hack?

On 02/04/2021 10.13, Chris Angelico wrote: > On Fri, Apr 2, 2021 at 7:52 AM David L Neil via Python-list > wrote: >> Officially April-Fools Day is over (here), but... > This wasn't a prank post, although it was intended to give amusement > rather than real education or debate or anything. So there

Re: Horrible abuse of __init_subclass__, or elegant hack?

On 02/04/2021 21.32, Alan Gauld via Python-list wrote: > On 02/04/2021 00:42, dn via Python-list wrote: > >> Contrarily "tuck" in (old) English slang represented "sweets" (or > > Not that old. We still use it occasionally today. And we > certainly had

Re: Horrible abuse of __init_subclass__, or elegant hack?

On 02/04/2021 13.00, Chris Angelico wrote: > On Fri, Apr 2, 2021 at 10:43 AM dn via Python-list > wrote: >> >> On 02/04/2021 10.13, Chris Angelico wrote: >>> Well, it's a simple matter of chronology. First you have crude oil, >>> then time passes, and th

Friday Finking: initialising values and implied tuples

When there are several items to be defined and initialised, how do you prefer to format the code, and why? Apprentice: learn options Journeyman: consider and discuss Python Master: define, declare, and correct/advise/tutor Some do not realise that using a tuple is a convenient way to convey mul

Re: Horrible abuse of __init_subclass__, or elegant hack?

On 03/04/2021 18.45, Greg Ewing wrote: > On 3/04/21 10:36 am, Chris Angelico wrote: >> It means exactly what you'd expect. The tricky part comes when you try >> to knife the block of chocolate, and it makes for a hilarious party >> game. > > A guillotine could be useful in the case of Whittaker's.

Re: Friday Finking: initialising values and implied tuples

On 03/04/2021 11.25, Marco Ippolito wrote: >> (a) basic linear presentation: >> >> resource = "Oil" >> time = 1 >> crude = 2 >> residue = 3 >> my_list = "long" >> >> (b) using explicit tuples: >> >> ( resource, time, crude, residue, my_list ) = ( "Oil", 1, 2, 3, "long" ) >> >> (c) linear and indent

Re: Friday Finking: initialising values and implied tuples

On 04/04/2021 01.00, Rob Cliffe via Python-list wrote: > > > On 03/04/2021 04:09, [email protected] wrote: >> On 2021-04-03 at 02:41:59 +0100, >> Rob Cliffe via Python-list wrote: >> >>> x1 = 42; y1 =  3;  z1 = 10 >>> x2 = 41; y2 = 12; z2 = 9 >>> x3 =  8;  y3 =  8

Re: HELP Please, Python Program Help

On 10/04/2021 22.57, Joseph Roffey wrote: > Hi, Im looking for some help with my program, I have been set a task to make > a Strain Calculator. I need it to input two numbers, choosing either Metres > or Inches for the 'Change in Length' divided by the 'Original Length' which > can also be in Me

Re: Style qeustion: Multiple return values

On 12/04/2021 20.29, Steve Keller wrote: > Just a short style question: When returning multiple return values, do > you use parenthesis? > > E.g. would you write > > def foo(): > return 1, 2 > > a, b = foo() > > or do you prefer > > def foo(): > return (1, 2) > >

Re: Style qeustion: Multiple return values

On 12/04/2021 22.32, Chris Angelico wrote: > On Mon, Apr 12, 2021 at 8:20 PM dn via Python-list > wrote: >> >> On 12/04/2021 20.29, Steve Keller wrote: >>> Just a short style question: When returning multiple return values, do >>> you use parenthesis? >>

Re: need help with a translation issue

On 18/04/2021 10.56, Quentin Bock wrote: > I'm trying to take the user input and let them change the target language > or dest > code: > ... > language_list = googletrans.LANGUAGES > print(language_list) ... > user_choice = input ("Enter a language (the abbreviation or correctly > spelled na

Re: need help with a translation issue

Longer response: NB I've not used the system and only quickly reviewed https://py-googletrans.readthedocs.io/_/downloads/en/documentation/pdf/ NBB I am treating you (and/or other interested-readers) as something of a 'beginner'. No insult is intended should I appear to be 'talking down'. On 18

Re: Comparing text strings

On 14/04/2021 04.05, Mats Wichmann wrote: > On 4/12/21 5:11 PM, Rich Shepard wrote: >> I'm running Slackware64-14.2 and keep a list of installed packages. >> When a >> package is upgraded I want to remove the earlier version, and I've not >> before written a script like this. Could there be a modul

Re: Determine what the calling program is

On 19/04/2021 01.46, Jason Friedman wrote: > I should state at the start that I have a solution to my problem. I am > writing to see if there is a better solution. > > I have a program that runs via crontab every five minutes. It polls a > Box.com folder for files and, if any are found, it copies

Re: do ya still use python?

On 20/04/2021 20.32, Alan Gauld via Python-list wrote: > On 20/04/2021 04:47, Dan Stromberg wrote: > >> Actually, this list is less busy than it was a decade or two ago, but >> that's probably because of things like stackoverflow, python-dev, pypy-dev, >> cython-devel, python-ideas, distutils-sig,

Re: Ad-hoc SQL query builder for Python3?

On 25/04/2021 02.24, Rich Shepard wrote: > My web searches are not finding what I need to include in an application > I'm > building: an ad-hoc sql query builder. > > End users will want to query their data for reports not included in the > built-in queries. My searches find a windows-only tool th

Re: Ad-hoc SQL query builder for Python3?

This message is not meant as a personal attack. The intention is to offer criticism of the way a vague question and its apparently non-specific replies, have produced less than satisfying 'results' - for everyone. A broad question can be good. I ask them too(!) 'Good', in the sense that its open

Re: Start Python programming

On 28/04/2021 05.32, Gazoo wrote: > > > I'd like to start learning Python programming. What sites/tutorials > could you recommend for beginner, please. Start with the Python Tutorial (https://docs.python.org/3/tutorial/index.html), thereafter there are other 'docs' at the same site. There are

Re: OT: Autism in discussion groups (was: Re: Proposal: Disconnect comp.lang.python from python-list)

On 09/05/2021 20.31, Abdur-Rahmaan Janhangeer wrote: > On Sun, May 9, 2021 at 5:29 AM Chris Angelico wrote: > >> >> Probably the same reason it has never worked. The only thing that's >> changed is the social acceptability of vilifying those you don't like. >> Once upon a time, there were those i

Re: Data structure for plotting monotonically expanding data set

On 27/05/2021 21.28, Loris Bennett wrote: > Hi, > > I currently a have around 3 years' worth of files like > > home.20210527 > home.20210526 > home.20210525 > ... > > so around 1000 files, each of which contains information about data > usage in lines like > > namekb > alice 1

Re: Applying winpdb_reborn

On 30/05/2021 11.52, Rich Shepard wrote: > On Sun, 30 May 2021, Chris Angelico wrote: > Please excuse my long-winded description of a FORTRAN IV bug in an lake > ecosystem energy model I wrote at the University of Illinois in the early > 1970s. It is an example of what you wrote above. > > The pr

Re: Definition of "property"

On 31/05/2021 04.57, Irv Kalb wrote: > I am doing some writing (for an upcoming book on OOP), and I'm a little > stuck. > > I understand what a "property" is, how it is used and the benefits, but > apparently my explanation hasn't made the light bulb go on for my editor. > The editor is aski

Re: Posting code on stackoverflow

On 06/06/2021 13.56, Terry Reedy wrote: > On 6/5/2021 5:36 PM, Rich Shepard wrote: >> I tried to post a question on stackoverflow.com which included a bunch of >> code (entered after clicking the box 'code'). I noticed that lines were >> wrapped but could not find how to expand the input box so the

Terminology: EU language skills, and Master to Main (or ...)

[to folk subscribed to both the Python list and Python-Tutor: apologies for cross-posting] Regarding levels of skill or complexity in learning, the European Union has been working on "The Common European Framework of Reference for Languages: Learning, Teaching, Assessment". It also standardises t

Re: Where did the message go?

On 15/06/2021 01.00, Grimble wrote: > I have two machines running Mageia 8 and Python 2.8.9, They use the same > Python script to maintain a list of changed packages from dnf update and > dnf install. In addition the script sends a short email message to my > main email address. The problem is: the

Re: Php vs Python gui (tkinter...) for small remote database app

On 15/06/2021 07.17, Pascal B via Python-list wrote: > Hi, > I would like to know if for a small app for instance that requires a > connection to a remote server database if php is more suitable than Python > mainly regarding security. > Php requires one port for http and one port for the connect

Re: Behaviour of pop() for dictionaries

On 15/06/2021 09.18, BlindAnagram wrote: > On 14/06/2021 20:43, Chris Angelico wrote: >> On Tue, Jun 15, 2021 at 5:41 AM BlindAnagram ... > No it isn't hard to use popitem() but it evidently proved hard for me to > remember that it was there. If that's a problem, you're going to love using deques

Re: Where did the message go?

On 16/06/2021 04.47, Chris Angelico wrote: > On Wed, Jun 16, 2021 at 2:41 AM Grimble wrote: >> Thanks for reminding me of the log files. I've worked out that the >> message on machine H (for haydn, which shows my preferred music genre) >> was bouncing because haydn.. was not a registered

Re: Behaviour of pop() for dictionaries

On 15/06/2021 21.37, BlindAnagram wrote: > On 15/06/2021 00:11, dn wrote: >> On 15/06/2021 09.18, BlindAnagram wrote: >>> On 14/06/2021 20:43, Chris Angelico wrote: On Tue, Jun 15, 2021 at 5:41 AM BlindAnagram >> ... > I think the difference here is that I know I am going to have to look at >

Re: tkinter: tksheet

On 17/06/2021 08.45, Rich Shepard wrote: > On Wed, 16 Jun 2021, Terry Reedy wrote: > >> Somewhat sparse doc at >> https://github.com/ragardner/tksheet/blob/master/DOCUMENTATION.md#5-modifying-table-data >> >> insert_row() > > Terry, > > I'm reading this now and saw that. > >> and change the col

Re: a simple question

On 27/07/2021 10.19, Glenn Wilson via Python-list wrote: > I recently downloaded the latest version of python, 3.9.6. Everything works > except, the turtle module. I get an error message every time , I use basic > commands like forward, backward, right and left. My syntax is correct: > pat.forwa

Re: SQLALchemy: update with in clause from kwargs

On 04/08/2021 13.08, Larry Martell wrote: > I am trying to write a function that takes kwargs as a param and > generates an update statement where the rows to be updated are > specified in an in clause. > > Something like this: > > def update_by_in(self, **kwargs): > filter_group = []

Re: Errors and some bugs

On 09/08/2021 15.12, Himanshu Gupta wrote: > While running some pip command to install spacy package for ver3.9 I always > face trouble can you provide a solution The short answer is "yes", but what is the problem? Please copy-paste the install command and the (full) error message, from the termi

Re: on slices, negative indices, which are the equivalent procedures?

Apologies for lateness. Coincidentally, I've been asked to speak to our local Python Users' Group on slicing. Herewith an attempt to modify those demos around your data/question. Apologies if the result is thus somewhat lacking in flow. Also, whereas I prefer to illustrate 'how it works', I percei

Re: on slices, negative indices, which are the equivalent procedures?

On 12/08/2021 02.59, Jack Brandom wrote: > dn writes: > ... >> Also, whereas I prefer to illustrate 'how it works', I perceive that you >> are used to learning 'rules' and only thereafter their application (the >> teaching-practice under which most of us learned) - so, another reason >> for mixi

Re: on slices, negative indices, which are the equivalent procedures?

On 12/08/2021 10.32, Dennis Lee Bieber wrote: > On Wed, 11 Aug 2021 11:59:11 -0300, Jack Brandom > declaimed the following: >> Where are these production rules coming from? They're not at >> https://docs.python.org/3/reference/grammar.html >> The word ``stride'' doesn't appear in this grammar.

Re: on writing a while loop for rolling two dice

On 29/08/2021 08.46, Hope Rouselle wrote: > Here's my solution: > > --8<---cut here---start->8--- > def how_many_times(): > x, y = 0, 1 > c = 0 > while x != y: > c = c + 1 > x, y = roll() > return c, (x, y) > > Why am I unhappy? I'm wish I cou

Re: on writing a while loop for rolling two dice

On 29/08/2021 20.06, Peter Otten wrote: ... > OK, maybe a bit complicated... but does it pay off if you want to > generalize? > def roll_die(faces): > while True: yield random.randrange(1, 1 + faces) > def hmt(faces, dies): > for c, d in enumerate(zip(*[roll_die(faces)]*dies), 1

Re: on writing a while loop for rolling two dice

On 29/08/2021 22.24, Chris Angelico wrote: > On Sun, Aug 29, 2021 at 8:14 PM dn via Python-list > wrote: >> Efficiency: >> - wonder how max( d ) == min( d ) compares for speed with the set() type >> constructor? > > That may or may not be an improvement. > >&

Re: on writing a while loop for rolling two dice

On 30/08/2021 00.47, Peter Otten wrote: > On 29/08/2021 12:13, dn via Python-list wrote: >> On 29/08/2021 20.06, Peter Otten wrote: >> ... >>> OK, maybe a bit complicated... but does it pay off if you want to >>> generalize? >>> >>>

Re: The sqlite3 timestamp conversion between unixepoch and localtime can't be done according to the timezone setting on the machine automatically.

On 31/08/2021 11.07, Dennis Lee Bieber wrote: > On Sun, 29 Aug 2021 19:49:19 -0700 (PDT), "[email protected]" > declaimed the following: ... > Might have helped to mention you were in China... To me, CST is North > America Central Standard Time (and I'd have expected this time of year to >

Re: The sqlite3 timestamp conversion between unixepoch and localtime can't be done according to the timezone setting on the machine automatically.

On 01/09/2021 00.45, Chris Angelico wrote: > On Tue, Aug 31, 2021 at 8:55 PM MRAB wrote: >> On 2021-08-31 02:16, dn via Python-list wrote: >>> On 31/08/2021 11.07, Dennis Lee Bieber wrote: >>>> On Sun, 29 Aug 2021 19:49:19 -0700 (PDT), "hongy...@gmail

Re: The sqlite3 timestamp conversion between unixepoch and localtime can't be done according to the timezone setting on the machine automatically.

On 01/09/2021 09.13, Chris Angelico wrote: > On Wed, Sep 1, 2021 at 6:38 AM dn via Python-list > wrote: >>> Yeah. I do recommend making good use of the IANA tzinfo database >>> though (especially since Python 3.9 made that a bit easier to access), >>> as it'

Re: The sqlite3 timestamp conversion between unixepoch and localtime can't be done according to the timezone setting on the machine automatically.

> Yeah. And if you think you've heard it all, sign up for the > tzdata-announce mailing list and wait for the next phenomenon. I think > Egypt (Africa/Cairo) is currently in the lead for weirdest timezone > change, for (with short notice) announcing that they'd have DST during > summer but not duri

Re: The sqlite3 timestamp conversion between unixepoch and localtime can't be done according to the timezone setting on the machine automatically.

On 01/09/2021 11.27, MRAB wrote: > On 2021-08-31 23:31, Chris Angelico wrote: >> On Wed, Sep 1, 2021 at 8:22 AM MRAB wrote: >>> >>> [snip] >>> In the EU, DST in the member states changes at the same time. It's not >>> like the US where it ripples across the timezones, so the differences >>> vary d

Re: Problem with python

On 05/09/2021 06.27, Igor Korot wrote: > Hi, ALL, > > [code] > igor@WaylandGnome ~/bakefile $ python > Python 3.9.6 (default, Aug 8 2021, 17:26:32) > [GCC 10.3.0] on linux > Type "help", "copyright", "credits" or "license" for more information. from distutils import sysconfig print sysc

Friday Finking: Contorted loops

Why does Python not have a repeat-until loop construct? (or should that be 'modern programming languages'?) This is a perennial question (one contributor calling it "immemorial"), but there seem to be reasons why the Python Interpreter would find such a construct awkward, or is otherwise unable to

Re: on writing a while loop for rolling two dice

On 31/08/2021 01.50, Chris Angelico wrote: > On Mon, Aug 30, 2021 at 11:13 PM David Raymond > wrote: >> >>> def how_many_times(): >>> x, y = 0, 1 >>> c = 0 >>> while x != y: >>> c = c + 1 >>> x, y = roll() >>> return c, (x, y) >> >> Since I haven't seen it used in answers yet, her

Re: on writing a while loop for rolling two dice

On 11/09/2021 18.03, Chris Angelico wrote: > On Sat, Sep 11, 2021 at 3:26 PM dn via Python-list > wrote: >> >> On 31/08/2021 01.50, Chris Angelico wrote: >>> On Mon, Aug 30, 2021 at 11:13 PM David Raymond >>> wrote: >>>> >>>&

Re: The code version of python -i

Abdur-Rahmaan, Apologies for delay: several last-minute tasks were landed on me, so I haven't been able to 'read the list' since last week. > If i have a file name flower.py and i add x = 1 in it. > When i run python -i flower.py i get a shell > > If type x i get 1 x > 1 > > The value

Re: Question again

On 17/09/2021 12.25, Avi Gross via Python-list wrote: > I wonder if this is yet another case when a pop-up window closes rapidly > when done and any last text written is just not perceived. > > Good design in such cases makes a final pause till the user acknowledges in > some way that they are don

Re: XML Considered Harmful

On 22/09/2021 07.22, Michael F. Stemper wrote: > On 21/09/2021 13.49, alister wrote: >> On Tue, 21 Sep 2021 13:12:10 -0500, Michael F. Stemper wrote: >> >>> On the prolog thread, somebody posted a link to: >>> Given the source, shouldn't one

Re: XML Considered Harmful

On 24/09/2021 14.07, Stefan Ram wrote: > dn writes: >> With that, why not code it as Python expressions, and include the module? > > This might create a code execution vulnerability if such > files are exchanged between multiple parties. The OP's spec, as quoted earlier(!), reads: "It's m

Re: XML Considered Harmful

On 25/09/2021 06.59, Peter J. Holzer wrote: > There are a gazillion formats and depending on your needs one of them > might be perfect. Or you may have to define you own bespoke format (I > mean, nobody (except Matt Parker) tries to represent images or videos as > CSVs: There's PNG and JPEG and WEB

Re: XML Considered Harmful

On 26/09/2021 10.07, Stefan Ram wrote: > "Michael F. Stemper" writes: >> fitting hierarchical >> data into rows/columns just seems wrong > > There were hierarchical database management systems like > IMS by IBM based on that point of view. Today, almo

Re: XML Considered Harmful

On 26/09/2021 10.48, [email protected] wrote: > On 2021-09-25 at 15:20:19 -0500, > "Michael F. Stemper" wrote: > >> ... For instance, if >> I modeled a fuel like this: >> >> >> ton >> 21.96 >> 18.2 >> ... > Disclaimer: I am not a big XML fan, for a number of

Re: Posts from gmane no longer allowed?

On 27/09/2021 06.34, Grant Edwards wrote: > On 2021-09-26, Ethan Furman wrote: >> On 9/26/21 9:21 AM, Grant Edwards wrote: >>> On 2021-09-26, Chris Angelico wrote: >> I'm not sure whether the policy change happened on python-list, or at gmane. From the look of the error message you got,

Re: XML Considered Harmful

On 25/09/2021 11.26, David L Neil via Python-list wrote: > On 25/09/2021 11.00, Chris Angelico wrote: > >> Invented because there weren't enough markup languages, so we needed another? > > Anything You Can Do I Can Do Better > https://www.youtube.com/watch?v=_UB1YAsPD6U Article (rather brief) i

OT: AttributeError

On 29/09/2021 10.50, Stefan Ram wrote: > (For Python programmers who have watched "Game of Thrones".) > > |>>> class girl: > |... pass > |... > |>>> girl = girl() > |>>> print( girl.name ) > |Traceback (most recent call last): > | File "", line 1, in > |AttributeError: A girl has no name.

Re: XML Considered Harmful

On 29/09/2021 06.53, Michael F. Stemper wrote: > On 28/09/2021 10.53, Stefan Ram wrote: >> "Michael F. Stemper" writes: >>> Well, I could continue to hard-code the data into one of the test >>> programs >> >>    One can employ a gradual path from a program with hardcoded >>    data to an entity sh

Re: OT: AttributeError

On 29/09/2021 12.21, Chris Angelico wrote: > On Wed, Sep 29, 2021 at 9:10 AM <[email protected]> wrote: >> >> On 2021-09-29 at 11:38:22 +1300, >> dn via Python-list wrote: >> >>> For those of us who remember/can compute in binary, octal,

Re: OT: AttributeError

On 29/09/2021 19.16, Greg Ewing wrote: > On 29/09/21 3:03 pm, [email protected] wrote: >> Who thinks in little >> endian?  (I was raised on 6502s and 680XX CPUs; 8080s and Z80s always >> did things backwards.) > > The first CPU I wrote code for was a National SC/MP, which doesn't

Re: Definitive guide for Regex

On 01/10/2021 06.16, Barry Scott wrote: > > >> On 30 Sep 2021, at 12:29, Shaozhong SHI wrote: >> >> Dear All, >> >> I am trying to look for a definitive guide for Regex in Python. >> Can anyone help? > > Have you read the python docs for the re module? I learned from Jeffrey Friedl's book "Ma

Re: How to pass a method as argument?

On 30/09/2021 18.11, Anil Anvesh wrote: > I want to write a python calculator program that has different methods to > add, subtract, multiply which takes 2 parameters. I need to have an execute > method when passed with 3 parameters, should call respective method and > perform the operation. How

Re: Understanding the working mechanis of python unary arithmetic operators.

On 06/10/2021 10.10, Chris Angelico wrote: > On Wed, Oct 6, 2021 at 7:52 AM [email protected] > wrote: >> >> On Saturday, October 2, 2021 at 4:59:54 PM UTC+8, [email protected] wrote: This thread seems to have been very one-sided. Either I've forgotten selective use of the DEL-key, or the abo

Re: Selenium py3.8+ DepreciationWarnings - where to find doc to update code?

The issues illustrated likely have less to do with Python than with Selenium (or even Firefox - depending how far back we need to go). That and our fate with the many web-search engines prioritising 'authoritative sources' in their results. Such definition includes 'clicks' over time. It fails to

Re: New assignmens ...

On 23/10/2021 08.34, Chris Angelico wrote: > On Sat, Oct 23, 2021 at 6:24 AM Jon Ribbens via Python-list > wrote: >> >> On 2021-10-22, Stefan Ram wrote: >>> Paulo da Silva writes: Why doesn't this work if (self.ctr:=self.ctr-1)<=0: while this works if (ctr:=ctr-1)<=

Re: New assignmens ...

With apologies for pressing Send too early... On 23/10/2021 08.41, dn via Python-list wrote: > On 23/10/2021 08.34, Chris Angelico wrote: >> On Sat, Oct 23, 2021 at 6:24 AM Jon Ribbens via Python-list >> wrote: >>> >>> On 2021-10-22, Stefan Ram wrote: >&

Re: New assignmens ...

On 23/10/2021 12.51, Greg Ewing wrote: > On 23/10/21 8:49 am, dn wrote: >> Whereas, creating a list (or tuple...) is legal because the structure's >> name is an "identifier"! > > No, the restriction only applies to the LHS. The list construction > is on the RHS. That contention (above) may have

Re: New assignmens ...

On 26/10/2021 10.45, Chris Angelico wrote: > On Tue, Oct 26, 2021 at 8:42 AM Avi Gross via Python-list > wrote: >> Personally, I don't care what is done and suspect I will rarely feel much >> need to use the current walrus operator, let alone an enhanced Odobenus >> rosmarus operator like ::== ...

The task is to invent names for things

Some time ago I watched a video of a Raymond Hettinger talk. In it he recounted answering his son's question of 'what do you do, Dad?' by suggesting that programmers spend much?most of their time thinking of names - and good names are better than "n = name", etc. This theme developed throughout the

Re: The task is to invent names for things

On 27/10/2021 11.16, Stefan Ram wrote: > dn writes: >> Some time ago I watched a video of a Raymond Hettinger talk. In it he >> recounted answering his son's question of 'what do you do, Dad?' > > The Mental Game of Python - Raymond Hettinger (PyBay 2019) > > Around minute 21, Raymond says: >

Re: The task is to invent names for things

On 27/10/2021 11.21, Stefan Ram wrote: > [email protected] (Stefan Ram) writes: >> The Mental Game of Python - Raymond Hettinger (PyBay 2019) >> |What daddy does is make new words to make computers easier to use." > > BTW: It now also reminds me of: > > |What I Do > | > |I build paradigms

Re: Create a contact book

On 27/10/2021 04.16, Avi Gross via Python-list wrote: > Chris, > > I think it is time someone set up a business where they do the homework for > people for a mere $1,000 or so per hour. Anonymously, of course. And we can > refer requests for free homework advice there. > > Maybe the answer to thi

Re: New assignmens ...

On 24/10/2021 22.23, O365 Dict wrote: > Well I have the following use case: > > while (temp_result := calculate_next_couple(a, b))[1]: > a, b = temp_result > more calculations > > Which IMO would be clearer if I could just write: > > while ((a, b) := calculate_next_couple

Re: The task is to invent names for things

On 27/10/2021 23.41, Karsten Hilbert wrote: > Am Tue, Oct 26, 2021 at 11:36:33PM + schrieb Stefan Ram: > >> xyzzy = lambda x: 2 * x >> >> . Sometimes, this can even lead to "naming paralysis", where >> one thinks excessively long about a good name. To avoid this >> naming paralysis, one

Re: Python script seems to stop running when handling very large dataset

On 30/10/2021 11.42, Shaozhong SHI wrote: > Python script works well, but seems to stop running at a certain point when > handling very large dataset. > > Can anyone shed light on this? Storage space? Taking time to load/format/process data-set? -- Regards, =dn -- https://mail.python.org/mailm

Re: The task is to invent names for things

On 29/10/2021 07.07, Stefan Ram wrote: > The name should not be "optimized" for a certain use case > (as for the use in an if expression) only. "We", "have", > and "any" carry little information. A name should pack as > much information as possible in as least characters as > possible. So

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