[Python-ideas] Re: mro and super don't feel so pythonic

On Sat, 26 Mar 2022 at 18:01, malmiteria wrote: > Hi, > > Before anything, i made a github repository about this topic here : > https://github.com/malmiteria/super-alternative-to-super > > The core of what i wanna discuss here is that i don't think mro and super > (mainly because it relies on mro

[Python-ideas] Re: Addition of a "plus-minus" binary numeric operator

Add you can call this function plusminus Then use the funcoperators module to write : upper, lower = a +plusminus- b pip install funcoperators Le mar. 14 sept. 2021 à 16:02, Paul Moore a écrit : > I doubt it, it seems way too specialised to be worth making into a > language feature. > > If you

[Python-ideas] Re: symbolic math in Python

> solve(x**2 == 1/2) pip install funcoperators >>> solve(x ** 2 |Equals| 1/2) <<< Equals = infix(Eq) <<< from sympy import Eq Le mer. 19 mai 2021 à 08:40, Martin Teichmann a écrit : > Hi list, > > as you might have noticed, I am trying to improve the syntax and semantics > for symbolic math in

[Python-ideas] Re: symbolic math in Python

SUB Hello everyone, what is the usual way to "like" a mail in the maillist and subscribing to the thread ? By sending a message it adds me to the "Participants" in the webapp which is neat (I can then search for my messages) I could do it in the webapp but not everybody will see it Le mer. 19 m

[Python-ideas] Re: Add a mechanism so that multiple exceptions can be caught using `except E1, E2, E3:`

Static analysis and factorisation, I sub ! :D Le mar. 11 mai 2021 à 01:47, Rob Cliffe via Python-ideas < [email protected]> a écrit : > > > On 10/05/2021 12:43, Chris Angelico wrote: > > On Mon, May 10, 2021 at 9:36 PM Steven D'Aprano > wrote: > >> On Mon, May 10, 2021 at 10:04:58AM +1000,

[Python-ideas] Re: division of integers should result in fractions not floats

There it is : https://mail.python.org/archives/list/[email protected]/message/B4EPUQA3GCAXYWB6YMMNAJPMWP5L3QUH/ Le mar. 18 mai 2021 à 12:43, Ir. Robert Vanden Eynde a écrit : > This thread seems related to the other thread I just answered I don't > find, I wrote "ju

[Python-ideas] Re: division of integers should result in fractions not floats

This thread seems related to the other thread I just answered I don't find, I wrote "julia" there, hmmm Le mar. 18 mai 2021 à 12:41, Stephen J. Turnbull < [email protected]> a écrit : > David Mertz writes: > > On Fri, May 14, 2021, 4:31 PM Jonathan Fine > wrote: > > > > >

[Python-ideas] Re: Python 3.10: ranges in pattern matching

Scala also has "match" cases that are Class redefinable, used for regex for example About integers ranges, we already have the master class : builtins.range pip install funcoperators deals with the issue like this : for i in 1 /irange/ 5: print(i) # will print 1 2 3 4 5 Where irange = infix(

[Python-ideas] Re: Fractions vs. floats - let's have the cake and eat it

Julia has these kind of builtin things. The main problem is backward compatibility. However your tool is useful as a python-to-python parser (from the) (I remember some static analysis tools like "mpy"?) pip install funcoperators solve the problem differe

[Python-ideas] Re: Bringing the print statement back

That makes me think of ruby where you can omit some of the function call. On Wed, Jun 10, 2020, 02:08 Guido van Rossum wrote: > In Python 3.10 we will no longer be burdened by the old parser (though 3rd > party tooling needs to catch up). > > One thing that the PEG parser makes possible in about

[Python-ideas] Re: How to prevent shared memory from being corrupted ?

it. There's a lot of prior art on named locks of various sorts, I'd personally be inclined to give the things a name that can be used across different processes in some form and bootstrap from there. > Any thoughts on that ? > > > On 27-Jul-2020, at 3:50 PM, Robert Collin

[Python-ideas] Re: How to prevent shared memory from being corrupted ?

On Sun, 26 Jul 2020 at 19:11, Vinay Sharma via Python-ideas wrote: > > Problem: > Currently, let’s say I create a shared_memory segment using > mulitprocessing.shared_memory.SharedMemory in Process 1 and open the same in > Process 2. > Then, I try to write some data to the shared memory segment

[Python-ideas] Restricting Python

of changes down the road, particularly to binary imports; that would have to be flushed out after the initial changes, and by third party module developers. That’s it; thank you for your consideration. Robert Kaplan ___ Python-ideas mailing list

[Python-ideas] Re: "return if "

You can already do compact conditional returns with the current syntax: def foo(a, b): return (a != b or None) and a * b or even: foo = (lambda a, b: (a != b or None) and a * b) both return: foo(2, 5) # 10 foo(1, 1) # None ... but clarity would be better. On Fri, Jun 19, 2020 at 4:

[Python-ideas] Re: Extend the range functionality to allow infinite ranges

This is not really the best syntax, but I thought this generator expression might be of interest: counter = (d.update(n=d['n']+1) or d['n'] for d in [dict(n=-1)] for _ in iter(int,1)) It counts forever starting at 0. I was playing with only using generator syntax... On Fri, Jun 19, 2020 at 1:32

[Python-ideas] Re: New syntax for dict literals

I like Atsou's suggestion of omitting the key for literals: d = {:name, :addr, ’tel': '123-4567’} but using empty kwargs feels gross: d = dict(=name, =addr, tel='123-456') And this feels like it could easily lead to confusion: d = dict(name, addr, tell='123-456') On Thu, Jun 11, 2020 at 4:05

[Python-ideas] Re: Link: Bidirectional Aliasing in Python

On Mon, 23 Sep 2019 at 10:14, Nutchanon Ninyawee wrote: > > Hi, Python community > I would like to discuss with you about the idea of "bidirectional Aliasing". > I am not good at English wording. I will try my best to communicate the idea I think the idea is clear enough, but what isn't clear is

[Python-ideas] Re: Custom string prefixes

On Another Subject, we could also have a language change staying that those two lines are equivalent : something"hello" something("hello") So that, any callable in the context can be used as a prefix ? On Tue, Aug 27, 2019, 01:11 wrote: > In Python strings are allowed to have a number of speci

[Python-ideas] Re: Make $ a valid identifier and a singleton

I used "..." in my lib to do that : from funcoperators import bracket @bracket def foo(x, y): print(x, y) partialized = foo[..., 10] partialized(5) https://pypi.org/project/funcoperators/ Le dim. 23 juin 2019 à 21:34, James Lu a écrit : > > Make $ a valid identifier and a singleton. > > >

[Python-ideas] Re: Canceling thread in python

Do you have a link to that? Googling king .net threads got me some strange results 😁. What made it particularly sane? On Thu, 20 Jun 2019, 23:59 Michael Foord, wrote: > > > On Thu, 20 Jun 2019 at 06:15, Matúš Valo wrote: > >> Hi All, >> >> Currently it is not possible to "kill" thread which is

[Python-ideas] Re: `if-unless` expressions in Python

> print([ > 3, > if False never_called() unless False, > if False never_called() unless False, > 2, > if True 5 unless False, > 4 >]) # => [3, 2, 5, 4] Do you mean this ?Currently what I use is the `*` operator on lists : ``` print([ 3, ] + ([never_called()

Re: [Python-ideas] zipfile refactor and AES

This sounds like a valuable refactoring to me. Is it API compatible with the current zipfile module docs? On Mon, 3 Jun 2019, 20:23 Daniel Hillier, wrote: > Hi, > > I've written a package that can read and write zip files encrypted with > Winzip's AES encryption scheme (https://github.com/danif

Re: [Python-ideas] Proposal: Allowing any variable to be used in a 'with... as...' expression

On Sun, 19 May 2019 at 12:17, Yonatan Zunger wrote: > > Hi everyone, > > I'd like to bounce this proposal off everyone and see if it's worth > formulating as a PEP. I haven't found any prior discussion of it, but as we > all know, searches can easily miss things, so if this is old hat please LMK

Re: [Python-ideas] Passing positional arguments as keyword arguments (to provide function arguments out of order)

Le mer. 15 mai 2019 à 07:37, Anders Hovmöller a écrit : > > > > On 15 May 2019, at 03:07, Robert Vanden Eynde > wrote: > > > > Currently if one wants to provide positional arguments after keyword > arguments, it's not possible, one must begin with positi

[Python-ideas] Passing positional arguments as keyword arguments (to provide function arguments out of order)

Currently if one wants to provide positional arguments after keyword arguments, it's not possible, one must begin with positional arguments [1] or use keyword arguments [2] : ``` def f(x, *, long_name='foo'): return ... f(2, long_name='bar') # [1] f(long_name='bar', x=2) # [2] ``` The problem

Re: [Python-ideas] Proposal: "?" Documentation Operator and easy reference to argument types/defaults/docstrings

Looks like a more complicated way to say : def f(x:'int : which does stuff' = 5, y:'int : which does more stuffs') The code reading the annotations (like the linter) might then parse it simply using .split. robertvandeneynde.be Le ven. 26 avr. 2019 à 00:41, Peter O'Connor a écrit : > Dear all

Re: [Python-ideas] contains_any_in and contains_all_in

> > Trivial with re module, which will answer thequestion in one pass. > re.search('|'.join(map(re.escape, ['string1', 'string2', 'string3'])), master_string) For those who might find it non trivial. ___ Python-ideas mailing list [email protected]

Re: [Python-ideas] contains_any_in and contains_all_in

Here comes funcoperators again : if master_string -contains_any_in- ['string1', 'string2', 'string3']: Given from funcoperators import infix @infix def contains_any_in(string, iterable): return any(item in string for item in iterable) pip install funcoperators https://pypi.org/project/funco

Re: [Python-ideas] Starap function exists but it seems there's not such thing as "doublestarmap"

robertvandeneynde.be Le mer. 10 avr. 2019 à 12:55, Krokosh Nikita a écrit : > I need smth like starstarmap('{a} / {b}/ {c}'.format, [{a:1, b:2, c:3}, > {a:4, b:5, c:6}, ...]) > That's def starstarmap(f, it): return (f(**x) for x in it) That looks like a recipe, not a basis function ^^ _

Re: [Python-ideas] New explicit methods to trim strings

> And this really is simple enough that I don't want to reach for regex's > for it. That is, I'd write it by hand rather than mess with that. > Well, with re.escape it's not messy at all : import re def trim_mailto(s): regex = re.compile("^" + re.escape("mailto:";)) return regex.sub('', s) W

Re: [Python-ideas] Attribute-Getter Syntax Proposal

You can do : I suggest this syntax: > >>> map(.upper(), ['a', 'b', 'c']) > map(dot('upper'), 'a b c'.split()) map(dot('replace', 'x', 'y'), 'xo do ox'.split()) def dot(name, *args, **kwargs): return lambda self: getattr(self, name)(*args, **kwargs) > This would also work for attributes: >

Re: [Python-ideas] Add a "week" function or attribute to datetime.date

Currently one can do week = d.isocalendar()[1] The iso definition of a week number has some nice properties. robertvandeneynde.be On Fri, 1 Mar 2019, 11:44 Antonio Galán, wrote: > The week number is usually refered to the week of the year, but the week > of the month is also interesting, for e

Re: [Python-ideas] add fluent operator to everything

On Thu, 21 Feb 2019, 16:44 Rhodri James, wrote: > On 21/02/2019 15:31, Robert Vanden Eynde wrote: > > In funcoperators, because the dot operator is just syntaxic sugar for > > functions getattr and setattr with a string, > [snip hideousness] > > I have to say, that's

Re: [Python-ideas] add fluent operator to everything

In funcoperators, because the dot operator is just syntaxic sugar for functions getattr and setattr with a string, a.hello.world # can be implemented using infix a -o- 'hello' -o- 'world' # or using postfix a |dot('hello') |dot('world') # using from funcoperators import postfix, infix o = infix(g

Re: [Python-ideas] add fluent operator to everything

Heyy, it's funcoperators idea ! >>> [1,2,3].append(4)::sort()::max() +1 [1, 2, 3] |append(4) |to(sorted) |to(max) |to(plus1) You just have to : pip install funcoperators from funcoperators import postfix as to plus1 = postfix(lambda x: x+1) from funcoperators import postfix def append(x):

Re: [Python-ideas] Vectorization [was Re: Add list.join() please]

On Sat, 2 Feb 2019, 21:46 Brendan Barnwell some_list @ str.lower @ tokenize @ remove_stopwords > → some_list @ to(str.lower) @ to(tokenize) @ to(remove_stopwords) Where from funcoperators import postfix as to ___ Python-ideas mailing list Python-ideas

Re: [Python-ideas] Clearer communication

* I didn't have time to read the whole convo' yet * I think linking to a tutorial on "how to use a mailing list" that shows some examples on popular email client like Gmail on android or Mail in iOS would be something really helpful to beginners. When they subscribe, a bot would send that link al

Re: [Python-ideas] Clearer communication

le one way, but actually post another way, that is precisely > the sort of confusing lack of clarity that this thread is about. > Indeed, mixing standards is bad, but on the other hand, people can think "Robert is Eafp", "Robert is more LBYL when writing long messages") ___ Python-ideas mailing list [email protected] https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/

Re: [Python-ideas] Clearer communication

Email Can be fast, as long as it is structured. The list only impose the structure of "Thread" ie. Two mails are in the same thread if they have the same subject. Each thread can have it's own format. Email use the quoting mechanism using leading ">" ane generally people do not like html (switch

Re: [Python-ideas] Clearer communication

That's a nice question ! The main thing is "is this list more EmailLike or MessengerLike" When I speak on Messenger (or any instantaneous conversation software) I send a lot of very small messages, like "+1", it's interactive, I'm expecting a short answer. If I say something stupid, I undo, if I

Re: [Python-ideas] Vectorization [was Re: Add list.join() please]

I love moredots ❤️ With pip install funcoperators, one can implement the *dotmul* iff dotmul can be implemented as a function. L *dotmul* 1 Would work. Or even a simple tweak to the library would allow L *dot* s to be [x*s for x in L] and L /dot/ s to be [x/s for x in L]" I'd implement somethi

Re: [Python-ideas] Add list.join() please

> def stringify(*args, *, sep:str=SomeDefault): > I meant def stringify(*args, sep:str=SomeDefault) So an idea would use duck typing to find out if we have 1 iterable or a multiple stuff : def stringify(*args, sep:str=SomeDefault, fmt=''): it = args[0] if len(args) == 1 and hasattr(args[0], '

Re: [Python-ideas] Add list.join() please

> > def stringify(self, sep): > return sep.join(str(i) for i in self) > = map(sep.join(map(str, self)) However some folks want: def stringify(*args, *, sep:str=SomeDefault): return sep.join(map(str, args)) In order to have: >>> stringify(1, 2, "3", sep="-") 1-2-3 And I agree about the

Re: [Python-ideas] Add list.join() please

I love it when the discussion goes fast like here! :D The messages are short or long-structured-and-explaining, I love it :) -- Sorry if I may look like a troll sometimes, I truly like the conversation and I want to share the excitement :) ___ Python-id

Re: [Python-ideas] Add list.join() please

On Wed, 30 Jan 2019, 04:46 David Mertz wrote: Of course not! [...] > I agree > Of course, it also doesn't work on dictionaries. [...] > I agree ___ Python-ideas mailing list [email protected] https://mail.python.org/mailman/listinfo/python-ideas

Re: [Python-ideas] Add list.join() please

> stringify = lambda it: type(it)(map(str, it)) > stringify(range(5)) doesn't work ^^ One advantage or having a standard function is that it has been designed by a lot of persons for all possible use cases :) ___ Python-ideas mailing list Python-ideas@p

Re: [Python-ideas] Add list.join() please

+1 On Wed, 30 Jan 2019, 02:57 David Mertz "Not every five line function needs to be in the standard library" > > ... even more true for every one line function. I can think of a few > dozen variations of similar but not quite identical behavior to my little > stringify() that "could be useful."

Re: [Python-ideas] Add list.join() please

+1 Good performance analysis IMHO :) On Tue, 29 Jan 2019, 22:24 Jonathan Fine I've not been following closely, so please forgive me if I'm repeating > something already said in this thread. > > Summary: str.join allows us to easily avoid, when assembling strings, > 1. Quadratic running time. > 2.

Re: [Python-ideas] Add list.join() please

+1 to that email !! (how to do that in email haha) On Tue, 29 Jan 2019, 21:50 Chris Barker via Python-ideas < [email protected] wrote: > A couple notes: > > On Tue, Jan 29, 2019 at 5:31 AM Jamesie Pic wrote: > >> can you clarify the documentation >> topic you think should be improved or cr

Re: [Python-ideas] Add list.join() please

Oh and if you want to write ['a', 'b', 'c'].join('.') Check out pip install funcoperators and you can write : ['a', 'b', 'c'] |join('.') Given you defined the function below : from funcoperators import postfix def join(sep): return postfix(lambda it: sep.join(map(str, it)) You can even cho

Re: [Python-ideas] Add list.join() please

So you'd propose to add some kind of def Join(sep, *args): return sep.join(map(str, args)) To the standard lib ? Or to add another method to str class that do that ? class str: ... def Join(self, *args): return self.join(map(str, args)) I agree such a function is super

Re: [Python-ideas] Add list.join() please

> > > Personally what I find is perverse is that .join is a method of > strings > but does NOT call str() on the items to be joined. Yeah, that's a good reason to use .format when you have a fixed number of arguments. "{}, {}, {}, {}".format(some, random, stuff, here) And then there is

Re: [Python-ideas] Possible PEP regarding the use of the continue keyword in try/except blocks

On Sun., 6 Jan. 2019, 13:39 Simon > I was writing some python code earlier, and I noticed that in a code that > looks somwhat like this one : > > try: > i = int("string") > print("continued on") > j = int(9.0) > except ValueError as e: > print(e) > > >>> "in

Re: [Python-ideas] About the passing the function arguments in Keyword form.

It's very important that f(z=5) Raises an exception if z is not an argument. For your case, I'd do a wrapper, instead lf calling f(z=5) you can call UniversalCall(f, x=1, y=2, z=5) if you want to specify it on the caller side. Or else, you can create a decorator : @universal_callable def f(x, y)

Re: [Python-ideas] Range and slice syntax

I'm wondering how your examples would go with from funcoperators import infix (https://pypi.org/project/funcoperators/) sum(1:6) # instead of sum(range(1, 6)) > > sum(1 /exclusive/ 6) list(1:6) > > list(1 /exclusive/ 6) set(1 /exclusive/ 1) Note that you can pick another name. Note that you can

Re: [Python-ideas] dict.setdefault_call(), or API variations thereupon

> > The two are less connected than you seem to think. > Really ? What's the use mainstream use cases for setdefault ? I was often in the case of Alex. ___ Python-ideas mailing list [email protected] https://mail.python.org/mailman/listinfo/python-

Re: [Python-ideas] Add "default" kwarg to list.pop()

> > Does it make sense to draw some sort of parallel between next(myiterator, > default="whatever") and mylist.pop(default="whatever")? They exhaust the > iterator/list then start emitting the default argument (if provided). > Yep that's what I just did in my previous mail. """ I think the same w

Re: [Python-ideas] Add "default" kwarg to list.pop()

> > There are a number of PEPs in the 8000s that would be worth reading. > Will read that *à l'occaz*, closing the disgression now ^^ ___ Python-ideas mailing list [email protected] https://mail.python.org/mailman/listinfo/python-ideas Code of Cond

Re: [Python-ideas] Add "default" kwarg to list.pop()

> > In this case, the governance model for the Python language is being > discussed. > This was the info I was missing, where is it discussed ? Not only on this list I assume ^^ > Upvotes and downvotes don't mean anything. [...] > Yes, that's why random people wouldn't vote. But like, voting be

Re: [Python-ideas] Add "default" kwarg to list.pop()

Just English Vocabulary, what do you mean by "being in the air at the moment" ? Like, that's a subject that a lot of people in here like to talk ? Yes, to merge or not to merge, but people can UpVote/DownVote can't they ? :D Le ven. 2 nov. 2018 à 01:15, Chris Angelico a écrit : > On Fri, Nov 2,

Re: [Python-ideas] Add "default" kwarg to list.pop()

> > > That said, though, you may well not need to go to that effort. What is > being asked for here (if I'm not misreading) is a relatively simple > enhancement to a method on a built-in type (or a small handful of > types). If that garners reasonable support, the next step wouldn't be > a PEP, it'

Re: [Python-ideas] Implementing a set of operation (+, /, - *) on dict consistent with linearAlgebrae

And with libraries like pip install funcoperators or pip install infix, you can even write it infix :D from funcoperators import infix @infix def superop(d1, sc): return {k: (v *superopp* sc) for k, v in d1.items()} print({'a': 8} *superop* 5) Le mer. 31 oct. 2018 à 18:35, Vladimir Filipovi

Re: [Python-ideas] Add "default" kwarg to list.pop()

Oooh, PEP463, you're reason with I switch to LBYL or write studpid try except functions so much times. Oh and also the local assignement "let/where/statement" :D x = (y+1 where y = 3.14) because x = [y+1 for y in [3.14]][0] is an overkill and ugly. Should I write a PEP even though I know it's go

Re: [Python-ideas] Add "default" kwarg to list.pop()

I think the same way about set.pop, list.pop. About .index I agree adding default= would make sense but that's not exactly the same thing as the others. Do we have somewhere else a place where a linear search already accepts a default= kwarg ? def index(self, x): for i,y in enumerate(self):

Re: [Python-ideas] Implementing a set of operation (+, /, - *) on dict consistent with linearAlgebrae

useful to everyone one day, it may come one day to the standard library so that everybody will have it. Cheers, Robert ___ Python-ideas mailing list [email protected] https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http

Re: [Python-ideas] TypeHinting: From variable name to type

That would be a feature in my "python dialect" future library. Taking one valid python program and producing another python program : def f(request): return HttpResponse('ok') → def f(request: HttpRequest): return HttpResponse('ok') The dialect options would include "all top functions in

[Python-ideas] Introduce typing.SupportsFsPath

__fspath__ protocol. Please note that "Path" is not a replacement for "SupportsFsPath", since the concept of PEP 519 is, that I could implement new objects (without dependency to "Path") that are implementing the __fspath__ protocol. robert

Re: [Python-ideas] Why is design-by-contracts not widely adopted?

On 27 September 2018 at 11:50, Chris Angelico wrote: > Okay, but what is the contract that's being violated when you use > data= ? How would you define the contract that this would track? > That's what I'm asking. I don't know :). From a modelling perspective the correctness of the behaviour her

Re: [Python-ideas] Why is design-by-contracts not widely adopted?

On Thu., 27 Sep. 2018, 11:00 Chris Angelico, wrote: > On Thu, Sep 27, 2018 at 8:53 AM Robert Collins > wrote: > > > > On Thu, 27 Sep 2018 at 00:44, Marko Ristin-Kaufmann > > wrote: > > > > > > P.S. My offer still stands: I would be very glad to annota

Re: [Python-ideas] Why is design-by-contracts not widely adopted?

On Thu, 27 Sep 2018 at 00:44, Marko Ristin-Kaufmann wrote: > > P.S. My offer still stands: I would be very glad to annotate with contracts a > set of functions you deem representative (e.g., from a standard library or > from some widely used library). Then we can discuss how these contracts. It

Re: [Python-ideas] Why is design-by-contracts not widely adopted?

On Wed, 26 Sep 2018 at 05:19, Marko Ristin-Kaufmann wrote: > > Hi Robert, ... >> Claiming that DbC annotations will improve the documentation of every >> single library on PyPI is an extraordinary claim, and such claims >> require extraordinary proof. > > &

Re: [Python-ideas] Why is design-by-contracts not widely adopted?

On Mon, 24 Sep 2018 at 19:47, Marko Ristin-Kaufmann wrote: > > Hi, > > Thank you for your replies, Hugh and David! Please let me address the points > in serial. > > Obvious benefits > You both seem to misconceive the contracts. The goal of the > design-by-contract is not reduced to testing the c

Re: [Python-ideas] Proposal for an inplace else (?=) operator

That's an idea that could be added to my thread "dialects of python" in order to compile some fancy or specific syntax to regular python. Le sam. 22 sept. 2018 à 13:53, Lee Braiden a écrit : > Could I get some feedback on this? I'd like to know if anyone thinks it > might make it through the pe

Re: [Python-ideas] Moving to another forum system where moderation is possible

As said 100 times in the list, email is powerful, configurable but needs a lot of configuration (especially hard on mobile) and has a lot of rules (don't top post, reply to the list, don't html, wait, html is alright) whereas a web based alternative is easier to grasp (more modern) but adds more ab

Re: [Python-ideas] Pattern Matching Syntax (reprise)

excuse my being late for properly responding to the last thread on > "Pattern Matching Syntax" [1]. As Robert Roskam has already pointed out at > the beginning of that thread, there has been much previous discussion about > adding pattern matching to Python, and several proposals ex

Re: [Python-ideas] Keyword only argument on function call

>7. root=abs(complex(root)) >8. j=complex(0,1) >9. x1=(-b+j+sqrt(root))/2*a >10. x2=(-b-j+sqrt(root))/2*a >11. return x1,x2 >12. else: >13. x1=(-b+sqrt(root))/2*a >14. x2=(-b-sqrt(root))/2*a >15. return x1,x2 > > > After that,

Re: [Python-ideas] Keyword only argument on function call

> > > I disagree. Keyword arguments are a fine and good thing, but they are > best used for optional arguments IMHO. Verbosity for the sake of > verbosity is not a good thing. I disagree, when you have more than one parameter it's sometimes complicated to remember the order. Therefore, when you

[Python-ideas] Python dialect that compiles into python

Many features on this list propose different syntax to python, producing different python "dialects" that can statically be transformed to python : - a,b += f(x) → _t = f(x); a += _t; b += _t; (augmented assignement unpacking) - a = 2x + 1 → a = 2*x + 1 (juxtaposition is product) - f(*, x, y) →

Re: [Python-ideas] Keyword only argument on function call

I'm trying to see how it can be done with current python. from somelib import auto auto(locals(), function, 'a', 'b', 'c', d=5) auto(locals(), function).call('a', 'b', 'c', d=5) auto(locals(), function)('a', 'b', 'c', d=5) auto(locals()).bind(function).call('a', 'b', 'c', d=5) One of those synta

Re: [Python-ideas] Add recordlcass to collections module

What's the difference between you proposition and dataclasses ? Introduced in Python 3.7 ? Le sam. 1 sept. 2018 à 19:33, Jonathan Goble a écrit : > On Sat, Sep 1, 2018 at 1:08 PM Angus Hollands wrote: > >> As to the other questions, yes, do we need another module in the standard >> library? >>

Re: [Python-ideas] On evaluating features [was: Unpacking iterables for augmented assignment]

> > > By the same logic, wouldn't such a naive user also expect: > > a, b, c = 0 > > to set three variables to 0? > > Let's notice that this syntax is valid: a = b = c = 0 But for += there is no such direct translation. ___ Python-ideas mailing lis

Re: [Python-ideas] Syntactic sugar to declare partial functions

esn't return a new function (which has the advantage of keeping help(f)) Le sam. 11 août 2018 à 14:53, Robert Vanden Eynde a écrit : > > > Le sam. 11 août 2018 à 10:34, Vincent Maillol > a écrit : > >> Hello, >> >> Currently the user defined functions are mut

Re: [Python-ideas] Syntactic sugar to declare partial functions

Le sam. 11 août 2018 à 10:34, Vincent Maillol a écrit : > Hello, > > Currently the user defined functions are mutables, there can be existed > python codes like this: > > >>> def foo(): > ... pass > ... > >>> if not hasattr(foo, 'partial'): > ... foo.partial = {} > ... > > Adding a new me

Re: [Python-ideas] Syntactic sugar to declare partial functions

artiallymulti, and elipartial. Partially Multi allowing to write f[1, 2] as a sugar for f[1][2] (which is different than partial(f, (1,2)) ). Le dim. 5 août 2018 à 00:18, Daniel. a écrit : > That's an awesome library! Congratulation for doing this and thanks for > sharing! > &g

Re: [Python-ideas] Syntactic sugar to declare partial functions

> @partiallymulti > def stuff(x,y,z): > return x - y + 2*z > f = stuff[1,2] f(4) ___ Python-ideas mailing list [email protected] https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/

Re: [Python-ideas] Syntactic sugar to declare partial functions

The funcoperators lib on pypi does exactly that: from funcoperators import partially @partially def add(x: int, y: int) -> int: return x + y add_2 = add[2] @partiallymulti def stuff(x,y,z): return x - y + 2*z sort = partially(sorted) sort_by_x = sort.key(key=lambda element: element.x)

Re: [Python-ideas] With expressions

> > > > > A with-statement is great for when you care about the > implementation details. Somebody has to care about the process of > opening a file, reading from it and closing it. But when you *don't* > care about those implementation details, a simple interface like a > read() function is superi

Re: [Python-ideas] With expressions

> I know what functional programming is. What I don't understand is what > you mean when you say that the F.P. community "seems to be more > interested in python". Surely they are more interested in functional > languages than a multi-paradigm language like Python which does not > privilege functio

Re: [Python-ideas] With expressions

> > Expressionization may break the "one and only on obvious way" guideline, > but it can offer concise, readable code in a lot of instances where a > statement-based version would be clumsy and noisy, and there's already some > precedent for it: > > function declaration => lambda > for-loops => ge

Re: [Python-ideas] With expressions

Thanks for answering each line. If someone wants "too long didn't read", just check my code at the paragraph "readlines is a toy example, but maybe the code would be more creative". Le ven. 3 août 2018 à 03:07, Steven D'Aprano a écrit : > On Thu, Aug 02, 2018 a

Re: [Python-ideas] With expressions

This brings the discussion of variable assignement in Expression. Functional programming community seems to be more interested in python. lines = (f.readlines() with open('hello') as f) digit = (int('hello') except ValueError: 5) value = (x+y**2 where x,y = (2,4)) values = [x+y**2 for x in range(5

Re: [Python-ideas] Idea: msgfmt.py and pygettext..py should be -m executable modules

Shortcuts designed for CLI are just to "be more mnemonic" have to be considered with caution. If gettext is a package, it means the whole python community shoud agree on that. msgfmt is part of gettext, so yes, python -m gettest.msgfmt is the best long lasting command. Or it could be 'python -m

Re: [Python-ideas] Idea: msgfmt.py and pygettext..py should be -m executable modules

Shortcuts designed for CLI are just to "be more mnemonic" have to be considered with caution. If gettext is a package, it means the whole python community shoud agree on that. msgfmt is part of gettext, so yes, python -m gettest.msgfmt is the best long lasting command. Or it could be 'python -m

Re: [Python-ideas] Idea: Deferred Default Arguments?

> Someone wrote : > Thank you for your deferred default values idea, which we're now working on together. > https://github.com/petered/peters_example_code/blob/master/peters_example_code/deferral.py Allowing to write: from deferral import deferrable_args, deferred @deferrable_args def f(x, y=2, z

Re: [Python-ideas] Can we add "zip and assert equal length" to the standard library?

This is a functionality I sometimes need. Maybe you can do a pull request to more-itertools and that would be the end of it? I don't know if that's general enough for being added to the standard library, more-itertools seems the way to go for me. Go find out if raising a ValueError suits their Api

Re: [Python-ideas] Change repr of collections.OrderedDict to be more dict-like

ot;, pformat(od) could be "OrderedDict{1:2, 3,4}" or "OrderedDict({1:2, 3:4})" but I don't ask for repr or pprint to change, just curious about how to implement that. Le ven. 27 juil. 2018 à 11:53, Chris Angelico a écrit : > On Fri, Jul 27, 2018 at 7:45 PM, Thomas Jollans wr

Re: [Python-ideas] Change repr of collections.OrderedDict to be more dict-like

8 à 07:58, Steven D'Aprano mailto:[email protected]>> a écrit : On Fri, Jul 27, 2018 at 05:30:35AM +, Robert Vanden Eynde wrote: > Currently, what's the best way to implement a function > f(OrderedDict([(1,2),(3,4)])) == '{1: 2, 3: 4}', works for all &

Re: [Python-ideas] Change repr of collections.OrderedDict to be more dict-like

Currently, what's the best way to implement a function f(OrderedDict([(1,2),(3,4)])) == '{1: 2, 3: 4}', works for all possible types, and also availaible for pprint with nice indent? If I could set a parameter in ipython or python repl that would print that, that would already be very useful. L

Re: [Python-ideas] As-do statements/anonymous blocks in python

> lumberjack(15, %) > # is equivalent to the expression > lambda x: lumberjack(15, %) You mean lambda x: lumberjack(15, x) ? So you'd want a better syntax for functools.partial, here your example is partial(lumberjack, 15). However this syntax you allow to write lumberjack(%, 15) which is only p

Re: [Python-ideas] A better (simpler) approach to PEP 505

The default could be at the end with an argument to unboxing : favorite = NoneAware(cfg).user.profile.food.unbox("Spam") Le lun. 23 juil. 2018 à 17:26, Paul Moore a écrit : > On 23 July 2018 at 16:12, David Mertz wrote: > > The need addressed by PEP 505 is real; it's also MUCH more niche and

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