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

eg "Monsoon Season". Thus, are not appropriate for use amongst an international audience. Web.Ref: Amusing discussion of ISO 8601:2019 (not the usual dry and turgid documentation one expects from a standards organisation) https://www.iso.org/news/2017/02/Ref2164.html -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: OT: Autism in discussion groups

Am 09.05.2021 um 02:34 schrieb Michael Torrie: > On 5/8/21 3:28 PM, Mirko via Python-list wrote: >> >> I apologize for this OT post, especially because it's in reply to an >> at least partly troll post, but I just can't resist. Sorry. >> >> P.S.:

Re: The importance of mental health

their "mental cold" or their "mental cancer". The danger of mockery or discrimination is still far to high. All the best, Kyle and good luck! :-) -- https://mail.python.org/mailman/listinfo/python-list

Re: Python script accessing own source code

d()) Give it a filename as a command-line argument and it will write itself to that file. -- https://mail.python.org/mailman/listinfo/python-list

Python install failing. Install log is available.

thoughts? Using python-3.9.5-amd64.exe, OS is win 2016 server eval, fresh install. -- https://mail.python.org/mailman/listinfo/python-list

Re: Python install failing. Install log is available.

/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 >> shou

Re: Data structure for plotting monotonically expanding data set

f files from which the data has been extracted, and the second containing the data currently formatted as a dict. NB The second may benefit from stating in "normal form" or splitting into related tables, and certainly indexing. Thus the process requires two steps: firstly to capture the data (from the files) into the DB, and secondly to graph the appropriate groups or otherwise 'chosen' users. SQL will simplify data retrieval, and feeding into matplotlib (or whichever tool). It will also enable simple improvements both to select sub-sets of users or to project over various periods of time. YMMV! -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Applying winpdb_reborn

rt: http://www.columbia.edu/cu/computinghistory/029.html Those were the days... -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Definition of "property"

t to more focussed functionality ... eg an integer which may not hold a negative value, a string which may not be empty... -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Posting code on stackoverflow

how to enter code if it's not just >> clicking on >> the 'code' box before pasting text > > Last time I tried *before*, it did not work.  paste, reselect (a > nuisance) and click does. Using text-mode email formatting and copy-pasting 'here', works well! -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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 st

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

Hi, see below On 13/06/2021, dn via Python-list wrote: > [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

optimization of rule-based model on discrete variables

ution. What's the best way to approach the problem? In case, does something already exist in python? thank you -- https://mail.python.org/mailman/listinfo/python-list

Re: optimization of rule-based model on discrete variables

that can be absent (0), present (1), modified (2). yi represent a quality index of the mixtures and g is a global quality of the whole process. Thank you in advance ele -- https://mail.python.org/mailman/listinfo/python-list

Re: Where did the message go?

gt; reply: b'221 2.0.0 Bye\r\n' > reply: retcode (221); Msg: b'2.0.0 Bye' > > The SMTP part of the system is working (hence this message). > The message from machine B correctly interprets "sysname" as > sysn...@sysname.. i.e a valid addr4ess. &

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 o

Re: Behaviour of pop() for dictionaries

rst-out". Stacks are somewhat the opposite: LIFO - "last-in, first-out". The "pop" operation was defined as taking the "next" item from the queue or the "last" item from a stack (the opposite of "push"). However, between queue and stack, the te

Re: optimization of rule-based model on discrete variables

re I can help you much. After the optimization, I will use f just to predict new Xi. Thanks -- https://mail.python.org/mailman/listinfo/python-list

Re: optimization of rule-based model on discrete variables

mming a f() "variable" > function where the code of f() (the decision tree) is set by Z3 and not > by you such f() leads to the optimum of g()) > https://book-of-gehn.github.io/articles/2021/05/26/Casting-Broadcasting- LUT-and-Bitwise-Ops.html > > > Happy hacking. > Martin. > > Interesting, I completely didn't know about this Z3 tool, I'll try to go into that. Thank you for hint. BTW the first two links I think are broken. Ele -- https://mail.python.org/mailman/listinfo/python-list

Re: Where did the message go?

. was not a registered subdomain with >> my ISP, whereas bach.. was registered. Sorted now. >> > > I like your naming convention :) He's playing your tune! -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Behaviour of pop() for dictionaries

gt; the Ferranti Pegasus that was my first encounter with computers. That does pre-date the prehistoric computers I managed to play-with! There's apparently one in LON's Science Museum. Don't know if it was there when I last visited (c.15 years ago) - I do recall their Babbage implementations and an analog computer (looked like some torture rack) similar to one that my father used way, way, way-back. Similarly, considering it/another similar exhibit and talking with our friends about the 'joys' of using paper tape (and its talent for wrapping itself around anything and everything, except where you wanted it) and those of (assembler) programming delays in order to store data on rotating mag-drums. Those were the days! (or maybe not) -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: optimization of rule-based model on discrete variables

s thing g that somehow depends on all > of your mixtures at once. > > I'm still not seeing the big picture. sorry I wrote it wrongly, my bad, I will use f just to predict yi from new coming Xi. -- https://mail.python.org/mailman/listinfo/python-list

Re: tkinter: tksheet

s I'm building are both database applications. If > tksheet() is not the most appropriate widget to display database tables > what > alternative would be better? Use the DBMS by retrieving the data in the desired sequence? -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Optimizing Small Python Code

large n it would become obvious. jan On 24/06/2021, Avi Gross via Python-list wrote: > Yes, I agree that if you do not need to show your work to a human, then the > problem specified could be solved beforeand and a simple print statement > would suffice. > > Ideally you want to make

Re: Optimizing Small Python Code

ity of an object, such as a piece of text, is the length of a shortest computer program (in a predetermined programming language) that produces the object as output". cheers jan On 24/06/2021, Avi Gross via Python-list wrote: > Jan, > > As an academic discussion, yes, many enhance

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 i

Re: SQLALchemy: update with in clause from kwargs

never, never(!) use a name which will "shadow" a Python keyword or frequently-used function-name (in this case "values" ) - if you don't confuse Python you will confuse simple-boys like me! Plus, when you come back in six-month's time, does "values" tell you what kind of value it is/holds? 2 Python != C | Java Thus: company_code, portfolio_name Web.Refs: https://www.dictionary.com/browse/bamboozled https://docs.python.org/3/library/itertools.html -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Errors and some bugs

essage, from the terminal-session into an email response, and we'll try to help... -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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

tem i of sequence a is selected by a[i]. Sequences also support slicing: a[i:j] selects all items with index k such that i <= k < j. When used as an expression, a slice is a sequence of the same type. This implies that the index set is renumbered so that it starts at 0. Some sequences also support “extended slicing” with a third “step” parameter: a[i:j:k] selects all items of a with index x where x = i + n*k, n >= 0 and i <= x < j. >>> So, now there is yet more alternate nomenclature for 'stride'. Plus there is no mention of negative-values for index or bound! For completeness: - the above exclusively discusses using slices to 'get' data - what we used to term "RHS", ie usage on the Right-Hand Side of an assignment. An expression may involve an index or slice on the LHS, if (and only if) the target-sequence is mutable (eg lists, but not strings or tuples). - slices and subscriptions can be used in a del statement, but exactly what this means "is determined by the sliced object". (these are also topics for another day) Finally, it is not forgotten that you want to code a loop which simulates a slice with negative attributes. (although it is hoped that after the above explanations (and further reading) such has become unnecessary as a learning-exercise!) Please recall that whilst a slice-object will not, a range-object will work with a for-loop. So: >>> rng = range( 4, 0, -1 ) >>> list( rng ) [4, 3, 2, 1] >>> for index in rng: ... print( name[ index ], end=" " ) ... k c a >>> Oops! This looks familiar, so apply the same 'solution': >>> rng = range( 4, -1, -1 ) >>> list( rng ) [4, 3, 2, 1, 0] >>> for index in rng: ... print( name[ index ], end=" " ) ... k c a J The 'bottom line' is that such simulation code will become torturous simply because indexes/indices follow different rules to slices! Should you wish to persist, then may I suggest modifying mySlice(it, beg, end, step = 1) to: def my_slice( sequence, lower_bound, upper_bound, stride=1 ): and first splitting the implementation's decision-tree into two paths, according to whether the stride is positive or negative, before getting into 'the nitty-gritty'. Perversely (if not, foolishly) I have indulged (and can't recommend it!). Nevertheless, if you are determined, I will be happy to forward some test conditions, upon request (caveat emptor!)... Web.Refs/Further reading: https://docs.python.org/3/tutorial/introduction.html https://docs.python.org/3/reference/expressions.html#primaries https://docs.python.org/3/library/functions.html https://docs.python.org/3/tutorial/controlflow.html https://docs.python.org/3/library/stdtypes.html#typesseq https://docs.python.org/3/library/stdtypes.html#ranges https://docs.python.org/3/reference/simple_stmts.html https://docs.python.org/3/glossary.html https://web.archive.org/web/20190321101606/https://plus.google.com/115212051037621986145/posts/YTUxbXYZyfi https://docs.python.org/3/reference/datamodel.html -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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

make it all about 'me': If such was not sufficiently emphasised, do I need to review the topic to improve coverage? Now the boot is on the other foot: perhaps I should be using the program design advice (begin the decision tree by looking at the stride's direction) and apply that to proof-reading my talk's coverage to ensure that each 'half' of the 'network tree' is equally-well/sufficiently covered! Which brings us to:- >> and first splitting the implementation's decision-tree into two paths, >> according to whether the stride is positive or negative, before getting >> into 'the nitty-gritty'. > > That I had already done. Great! ... > Yes, send me your tests! (``Caveat emptor'' noted.) (I had included all > tests that appeared in this thread, but had missed, for example, "Jack > Brandom"[-100 : 100]. Didn't occur to me this wouldn't blow an > exception.) (and here's the justification for the earlier rave about using real email addresses - I should be sending this to you-alone, and not 'cluttering-up' the entire list (and its archive)!) <<< # would normally put TDD/unit tests in separate file from 'real code' """Three-way tests comparing: 1 the output of the slice simulation function (under test) 2 the expected output string 3 the actual output from a slice """ name = "Jack Brandom" # assert web.ref: https://www.simplilearn.com/tutorials/python-tutorial/assert-in-python (in case needed) assert ( my_slice( name, lower_bound=0, upper_bound=12 ) == 'Jack Brandom' == name[ 0:12 ] ) assert ( my_slice( name, upper_bound=6 ) == 'Jack B' == name[ :6 ] ) assert ( my_slice( name, lower_bound=5 ) == 'Brandom' == name[ 5: ] ) assert ( my_slice( name ) == 'Jack Brandom' == name[ : ] ) assert ( my_slice( name, stride=2 ) == 'Jc rno' == name[ ::2 ] ) assert ( my_slice( name, lower_bound=-100, upper_bound=+100 ) == 'Jack Brandom' == name[ -100:100 ] ) assert ( my_slice( name, upper_bound=4 ) == 'Jack' == name[ :4 ] ) assert ( my_slice( name, upper_bound=-8 ) == 'Jack' == name[ :-8 ] ) assert ( my_slice( name, lower_bound=5 ) == 'Brandom' == name[ 5: ] ) assert ( my_slice( name, lower_bound=-7 ) == 'Brandom' == name[ -7: ] ) assert ( my_slice( name, lower_bound=1, upper_bound=9 ) == 'ack Bran' == name[ 1:9 ] ) assert ( my_slice( name, lower_bound=-11, upper_bound=-3 ) == 'ack Bran' == name[ -11:-3 ] ) assert ( my_slice( name, lower_bound=3, stride=-1 ) == 'kcaJ' == name[ 3::-1 ] ) assert ( my_slice( name, lower_bound=-9, stride=-1 ) == 'kcaJ' == name[ -9::-1 ] ) assert ( my_slice( name, upper_bound=4, stride=-1 ) == 'modnarB' == name[ :4:-1 ] ) assert ( my_slice( name, upper_bound=-8, stride=-1 ) == 'modnarB' == name[ :-8:-1 ] ) assert ( my_slice( name, lower_bound=6, upper_bound=2, stride=-1 ) == 'rB k' == name[ 6:2:-1 ] ) assert ( my_slice( name, lower_bound=-6, upper_bound=-10, stride=-1 ) == 'rB k' == name[ -6:-10:-1 ] ) >>> > Thank you so much. and thank you for helping to improve my talk... -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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

#x27;while I'm doing this, adding ... will be easy to do', aka "famous last words", see also "YAGNI". Negative-stepping comes-across as a bit of a party-trick. I wonder if anyone can offer a (professional) application? Similarly, when adding a __getitem__() to a custom-class, has anyone had need to implement/account for negative-stepping, to achieve some purpose? PS I'm waiting (with bated breath*) for @Chris' bared teeth... * or is that "baited"? -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: on writing a while loop for rolling two dice

e is/should be! Further that Python allows such a value to be used in comparisons: >>> None != None False >>> None == None True Leading to: c, x, y = 0, None, None while ... Which solution reverts to the original loop-contents. which seem more obvious and thus more readable. (YMMV!) Simplicity over 'being clever'... -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: on writing a while loop for rolling two dice

ly on computers running the Hollywood Operating System). Continuous Education: Thanks for the reminder that enumerate() can be seeded with a "start" value! -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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.

ldn't understand/didn't believe me - yet I am completely correct. (as always - cough, splutter, snort...) Welcome to the last day of (what may be) your summer! These things can be tricky... -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Struggling to understand timedelta rpesentation when applying an offset for an hour earlier - why is days = -1?

onds=82800))) ``` I cannot understand why the resultant datetime.timedelta is days=-1, seconds=82800 (23 hours) . Why is it not an hour earlier as seconds=-3600? Why is days = -1 when the resultant calculated date is the same, year, day, month?? -- https://mail.python.org/mailman/listinfo/python-list

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.

adan-hours" for 'flipping the switch' (in my head) and turning a late-night owl, and stereotypical techie/hacker; into an 'early bird'. Ironically such serves me well today - dealing with clients and colleagues on the other side of the planet, who much prefer me to wake-early, so that they don't have to interrupt their evenings at home... -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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

re seen as being wasted as many people are asleep at that time. If the sunlight hours are shifted to the evening, by way of daylight saving time, they are more useful. » -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Problem with python

way to fix this? Remember that in Python3 print became a function: print( sysconfig.get_python_inc() ) -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: on writing a while loop for rolling two dice

iculous > macro set. 1 Simple rule, if you are programming in language 'a' then write Language 'a' Code it. Just because you can do something doesn't mean you should -- Help! I'm trapped in a Chinese computer factory! -- https://mail.python.org/mailman/listinfo/python-list

Friday Finking: Contorted loops

as/2009-April/004306.html and https://mail.python.org/archives/list/python-id...@python.org/thread/2VUZ3J6C4GSHGBZJW62AY4HPEEBMXAT6/#2VUZ3J6C4GSHGBZJW62AY4HPEEBMXAT6 PEP 548 https://www.python.org/dev/peps/pep-0548/ BDFL Rejection https://mail.python.org/pipermail/python-dev/2017-September/149232.html Python-Ideas post https://mail.python.org/archives/list/python-id...@python.org/thread/EDNARFL2RGOE53SLWPTD5ZLJQOYSVDCR/#EDNARFL2RGOE53SLWPTD5ZLJQOYSVDCR Duke Paper https://users.cs.duke.edu/~ola/patterns/plopd/loops.html#loop-and-a-half RegEx in Python https://docs.python.org/3/library/re.html and https://docs.python.org/3/howto/regex.html "bastardise" (meaning 1) https://www.dictionary.com/browse/bastardize https://stackoverflow.com/questions/743164/how-to-emulate-a-do-while-loop DRY https://code.tutsplus.com/tutorials/3-key-software-principles-you-must-understand--net-25161 -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

leave

Sent with [ProtonMail](https://protonmail.com/) Secure Email. -- https://mail.python.org/mailman/listinfo/python-list

Re: on writing a while loop for rolling two dice

e readable layout. It doesn't use a two-arg iter, but still rates because it does use a relatively-obscure member of the itertools library... https://docs.python.org/3.8/library/itertools.html#itertools.takewhile -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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: Friday Finking: Contorted loops

is not worth the effort. it is not the job of the interpreter to sanitise stupid programming "Special Cases aren't special enough the break the rules" -- If you stew apples like cranberries, they taste more like prunes than rhubarb does. -- Groucho Marx -- https://mail.python.org/mailman/listinfo/python-list

Re: ANN: Dogelog Runtime, Prolog to the Moon (2021)

@ this stage I would recommend watching some presentations on you tube this one https://www.youtube.com/watch?v=wf-BqAjZb8M by Raymond Hettinger is brilliant as it highlights there is more to checking code than just making sure it looks nice & runs correctly. -- Lemmings don't grow older, they just die. -- https://mail.python.org/mailman/listinfo/python-list

Re: ANN: Dogelog Runtime, Prolog to the Moon (2021)

ython, write python -- Two percent of zero is almost nothing. -- Whoever dies with the most toys wins. -- https://mail.python.org/mailman/listinfo/python-list

Re: ANN: Dogelog Runtime, Prolog to the Moon (2021)

term = term.args[i] >> > >> > try replacing with something more pythonic >> > >> > for index,term in enumerate(term.args): >> > mark_term(term.args[i]) >> > >> > >> > & possibly go all the way to changing it into a comprehension >> > >> > there are other similar anti patterns throughout this code. >> > >> > any time you are manually keeping a counter as an index into a >> > list,tupple other iterable YOU ARE DOING IT WRONG! >> > >> > Do not write javascript in python, write python >> > >> > >> > >> > -- >> > Two percent of zero is almost nothing. >> > >> > >> > >> > >> > -- >> > Whoever dies with the most toys wins. -- Pie are not square. Pie are round. Cornbread are square. -- https://mail.python.org/mailman/listinfo/python-list

Re: ANN: Dogelog Runtime, Prolog to the Moon (2021)

ctly python does not fall-through & execute every subsequent case after a successful match. & finally the netiquette in this forum is to interleave of bottom post rather than top post, it makes it easier to follow the thread. -- Don't quit now, we might just as well lock the door and throw away the key. -- https://mail.python.org/mailman/listinfo/python-list

Re: ANN: Dogelog Runtime, Prolog to the Moon (2021)

either benign nor hostile, merely indifferent. -- Sagan -- https://mail.python.org/mailman/listinfo/python-list

Re: ANN: Dogelog Runtime, Prolog to the Moon (2021)

Show me a good loser, and I'll show you a loser." -- Vince Lombardi, football coach -- https://mail.python.org/mailman/listinfo/python-list

Re: The code version of python -i

structure what is currently a 'teaching notes' or "script" document (from which I was copy-pasting), and build a 'projector' program which will run a sub-interpreter* to run exactly one 'step' of the 'live-coding' demo at a time (whilst also retaining the option of REPL access, to be able prove or expose short-comings (nr 4, above), and without revealing the 'what comes next'? * rather than python -i; am considering Lib.runpy, and/or Lib.code How might any of this relate to your interest? -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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 wa

Re: XML Considered Harmful

osing the most apropriate tool for the job in hand. -- Antonym, n.: The opposite of the word you're trying to think of. -- https://mail.python.org/mailman/listinfo/python-list

Re: XML Considered Harmful

e, and a series of > ordered pairs (representing a piecewise linear curve). > > Can CSV files model this sort of situation? > >> As in all such cases it is a matter of choosing the most apropriate >> tool for the job in hand. > > Naturally. That's what I'm exploring. > > > [1] The kind made of tons of iron and copper, filled with oil, and > rotating at 1800 rpm. -- Riches cover a multitude of woes. -- Menander -- https://mail.python.org/mailman/listinfo/python-list

Re: XML Considered Harmful

own research, so I can give myself the data in any format that I > like. ... With that, why not code it as Python expressions, and include the module? -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: XML Considered Harmful

and with greater relevance: shouldn't we consider the OP's 'learning curve'? (such deduced only from OP's subsequent reactions/responses 'here' - with any and all due apologies) -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: XML Considered Harmful

mix > them all in a single document (and there are tools available to validate > your files). But those features make it very complex (you almost > certainly don't want to write your own parser) and you really have to > understand the data model (especiall namespaces) to use it. and YAML? -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: XML Considered Harmful

ed, overlaying hierarchy onto 3NF and using an RDBMS would be my first thought - but because of the recursive JOINs, I recommend something more capable than SQLite. -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: XML Considered Harmful

nly country to which your data applies. > If there's a standard for your industry, or your company, or on > some other level, then at least document what it is and that > you're using it, so that the next person (which may be you a > year from now) doesn't have to guess. +1 *always* add unit attributes -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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 >>>&

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=_UB1YAsPD

OT: AttributeError

irate stories: long John # Silver For those of us who remember/can compute in binary, octal, hex, or decimal as-needed: Why do programmers confuse All Hallows'/Halloween for Christmas Day? -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: XML Considered Harmful

rest of the solution (and 'learnings' from those steps) may (eventually) realise just as many, or even more, of the benefits of 'our approach' of producing a cohesive overall-design first! Possibly even more than the benefits we intended in 'our' approach(?). Unfortunately, it is a difficult adjustment to make (as related), and there are undoubtedly stories of how the 'fools rush in where angels fear to tread' approach is but a road to disaster and waste. The 'trick' is to "cherry pick" from today's affordances and modify our training/habits and experience to take the best advantages from both... Hope this helps to explain why you may have misunderstood some contributions 'here', or felt like arguing-back. Taking a step back or a 'wider' view, as has been attempted here, may show the implicit and intended value of (many) contributions. I'll leave you with a quote from Donald Knuth in The Art of Computer Programming, Volume 1: Fundamental Algorithms (which IIRC was first published in the late-60s/early-70s): “Premature optimization is the root of all evil.” So, maybe early-coding/prototyping and later "optimisation" isn't all bad! -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: OT: AttributeError

On 29/09/2021 12.21, Chris Angelico wrote: > On Wed, Sep 29, 2021 at 9:10 AM <2qdxy4rzwzuui...@potatochowder.com> 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

ou're implementing a CPU, though. Oh yes! The D2 kit - I kept those books for years... https://www.electronixandmore.com/adam/temp/6800trainer/mek6800d2.html -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Definitive guide for Regex

act that in my Python-life I've never been put into a corner where I absolutely must use one), I'm no longer a fan... -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: How to pass a method as argument?

deed we can become rather more 'creative' "+" " add, ... } Thereafter, we can apply the dict to solve the problem: calculator.get( command, "Error message/advice, eg mentioning add, or + etc" ) NB it has been left to you to perfect the technique so that the value(s) to be calculated are properly communicated to the chosen function. PS you may find the Python-Tutor Discussion List helpful -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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

es, eg an integer and a floating-point number, both utilise the same operator-symbol, enables us to draw analogies (and in this case, probably get it 100% correct), but this does not imply a complete equivalence across-the-board (particularly when crazy-people are let-loose with custom classes! Thus "a" + "b" should not be pronounced "add", even though the operator looks very much like the one we use to add two numbers! For fun, and quickly now, what happens here: 2 + 2 2 + 2.0 2.0 + 2 2.0 + 2.0 "2" + "2" 2 + "2" "2" + 2 (they're all 'the same', except the last two?three - aren't they???) -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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

elenium/docs/api/py/api.html#webdriver-firefox) Finally, (Warning: un-read, so un-tested) I recalled that my 'reading pile' includes "How to Create Firefox Profile in Selenium WebDriver" (https://www.guru99.com/firefox-profile-selenium-webdriver.html) which *may* offer hints about the 'new' handling of FF profiles. Again, YMMV! -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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.c

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 ...

creating a (whole) new list (for example) IS legal, because the list's name IS an identifier. Yes, the LHS must be an identifier - the point that was made in the first response (quoting "Python Language Reference") and since. -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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 &g

The task is to invent names for things

heme developed throughout the talk. Have searched, but been unable to re-locate this video. Do you recall the talk? Please advise its URL... -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: The task is to invent names for things

ingular, or should it be the plural "do" because "words" is plural? His first choice was grammatically-correct. Think of the pause as running pytest prior to further execution... Alternately, if your question was to identify the mumbled word, it is (seemed to me to be) "does". Thanks again! -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: The task is to invent names for things

cation) aren't 'that bad' after all! Programmers of the world unite! You have nothing to lose but your 0 - or your 1 -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

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. > >

Re: New assignmens ...

another data-structure, eg a list of data-points, then combining such with/into my_class may well yield further simplifications, encapsulations, and benefits - but all in-theory and complete ignorance of your application... Hope the above gives you some ideas/pause for thought! * this gratuitous and somewhat awkward expression is me claiming to be clever by quoting Lewis Carroll - if he isn't sick of me baiting-the-hook, it might earn extra brownie-points (or another groan) from @Chris... -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: The task is to invent names for things

e written in the user's terms (those of the "domain"). Thus, the easiest (and accuracy/consistency promoting) path, is to maintain the use of that terminology/names all the way through from spec to code. Above also reduces my cognitive load - an appealing characteristic for such a lazy "bear of little brain"... -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: The task is to invent names for things

osen there is less impetus on the programmer to change it, "its not great but it'll do" where as a nonsense name sticks out like a saw thumb until it is corrected. I am firmly undecided -- Riches cover a multitude of woes. -- Menander -- https://mail.python.org/mailman/listinfo/python-list

Re: The task is to invent names for things

unless it's easy -- After a number of decimal places, nobody gives a damn. -- https://mail.python.org/mailman/listinfo/python-list

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

l.python.org/mailman/listinfo/python-list

Re: The task is to invent names for things

ed to ask because 'everyone' knows! (OK, so am I allowed to give you a few PTRs about politesse?) NB I find that 'modern IDEs' and sundry plug-ins are possibly more responsible for making me PEP-008-compliant than any human(s). The nagging splatters of queries and criticisms are even les

Re: Getting Directory of Command Line Entry Point For Packages

file_path as-required. -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

OT: Alternatives to Jupyter Notebook

can't be wrong! Either one could help the OP, exactly the advice intended by the above post! Web.Refs: https://vscodium.com/ https://www.reddit.com/r/privacy/comments/n7l444/vscode_vs_vscodium/ Further philosophy: - "Liberté, égalité, fraternité " as a catch-cry of the French Revolution (translates to: liberty, equality, brotherhood) - becoming "created equal" and "Life, Liberty, and the Pursuit of Happiness" in the (US) Declaration of Independence - "some...more equal than others" purported corruption of 'purity' illustrated in Orwell's "Animal Farm" -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Advantages of Default Factory in Dataclasses

n ) The use of default-values for mutables is something of a Python 'gotcha'. My use-case is that some wise-soul's decision to do things this way prevents me from falling into that debugging "slough of despond". (does such qualify as a "use case"?) -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: import question

nguages, (which is perhaps why(?)) the system has fallen behind in Python release. -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Unexpected behaviour of math.floor, round and int functions (rounding)

ignorance' is particularly noticeable in folk who have come 'up' through the 'CodeCamp'/'BootCamp' approach to training. On the other hand, if one is not intending to 'get into' a scientific or highly mathematical branch of computing/Python, eg commercial applications using (only) Decimal (or int), the average web-app, and similar; why bother? -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Unexpected behaviour of math.floor, round and int functions (rounding)

On 20/11/2021 10.21, Chris Angelico wrote: > On Sat, Nov 20, 2021 at 7:39 AM dn via Python-list > wrote: >>>> >>> 0.3 + 0.3 + 0.3 == 0.9 >>>> False >>> >>> That's because 0.3 is not 3/10. It's not because floats are >>>

Eventfd with epoll BlockingIOError

Errno 11] Resource temporarily unavailable" and "Failed epoll_wait Bad file descriptor" from Python?  -- Sent with Tutanota, the secure & ad-free mailbox. -- https://mail.python.org/mailman/listinfo/python-list

Re: Eventfd with epoll BlockingIOError

e to why both processes freeze when I poll on only one event in each one.  Thanks for any ideas based on this update, and thanks again for your earlier reply.  Jen -- Sent with Tutanota, the secure & ad-free mailbox. Nov 25, 2021, 06:34 by ba...@barrys-emacs.org: > > > &g

Re: Negative subscripts

:len( x ) ] If the last item in x is to be excluded: x[ :-1 ] If the last two items ... excluded: x[ :-2 ] (etc) and another way to write those two specific examples is x[ :len( x ) - 1 ] and x[ :len( x ) - 2 ] and while we are taking things 'away' from the end of the iterable, the missing x[ :len( x ) ] is the same as x[ :len( x ) - 0 ] Thus, by now, you've leaped ahead of me, to: >>> for y in [ 0, 1, 2, 3, 4, 5 ]: ... print( y, x[ :len( x ) - y ] ) ... 0 ['a', 'b', 'c', 'd', 'e'] 1 ['a', 'b', 'c', 'd'] 2 ['a', 'b', 'c'] 3 ['a', 'b'] 4 ['a'] 5 [] and yes, if computing y is expensive/ugly, for extra-credit, calculate the 'stop' value outside/prior-to the for-loop! -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Friday Finking: Docstrings and DataClasses

es Dept Yet, such seems a quite-reasonable (updated for dataclasses) approach. Do you agree? Do you not bother with docstring style at all? Have you stuck with PEP-257, after all these years? Do you (still) use the Sphinx/RST format for docstrings, even though it seems even more repetitive and wordy? Have you updated your conventions/style-manual to acknowledge dataclasses? If so, how? -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: Negative subscripts

On 27/11/2021 19.11, Frank Millman wrote: > On 2021-11-26 11:24 PM, dn via Python-list wrote: >> On 26/11/2021 22.17, Frank Millman wrote: >>> In my program I have a for-loop like this - >>> >>>>>> for item in x[:-y]: >>> ...    [do stuff]

Re: print('\N{flag: Mauritius}') not supported in py3.9

a web-browser, the flags appear, as desired. Is this a terminal short-coming (locale charmap -> UTF-8 - which brings to mind the old UCS-4 questions), a font issue, or what (to fix)? -- Regards, =dn -- https://mail.python.org/mailman/listinfo/python-list

Re: pyinstaller wrong classified as Windows virus

thony.fl...@btinternet.com> -- https://mail.python.org/mailman/listinfo/python-list

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