t like
xarray and pandas working, but that just means it should be in xarray
and/or pandas. It doesn't feel at all right for regular Python to be
muddling indices and modal parameters to something that isn't a function
call like that
o interest in becoming one. This helped a lot. I
particularly like the slice notation, there is a clear win there.
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same solution ?
You can embed Python right now. The API to do it exists, and a number
of programs out in the world do exactly that.
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On 01/07/2020 11:24, Steven D'Aprano wrote:
On Tue, Jun 30, 2020 at 07:40:23PM +0100, Rhodri James wrote:
Don't get me wrong, if it's not going to cause performance issues I
think being able to index views would be great
What are your use-cases for indexing set-like
erformance issues I
think being able to index views would be great, but I don't think this
is the right way to justify it.
If anyone who knows could comment on the feasibility, that would be
great too :-)
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articularly obvious way to proceed.
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thing. So this is
currently parsed as "a == b + (-0.5)".
Reversing it to use -+ won't work because unary plus is also a thing.
A little bit out of the box, but what about:
a == b +/- 0.5
...or even:
a == b +or- 0.5
Is "math.isclose(a, b, abs_tol=0.5)" really so
ee the use case here. Could you supply some
examples?
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eded serious thought (usually because of a regex) and the
condition was an afterthought. For anything I actually cared about, I
wanted the visible structuring with line breaks and all.
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On 16/06/2020 06:56, doods...@gmail.com wrote:
Can we implement eventfd(2) as documented here
<https://man7.org/linux/man-pages/man2/eventfd.2.html>?
EventFD is available on PyPI: https://pypi.org/project/eventfd/
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tandardization,
not more.
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Messag
On 10/06/2020 16:38, Atsuo Ishimoto wrote:
Hi
Thank you for comments
2020年6月10日(水) 0:11 Rhodri James :
Python is not Perl. By that I mean Python in general tends not to use
non-alphanumeric symbols unless they already have a well established
meaning (such as quote marks, arithmetic operators
that's in convoluted environments driving test
equipment, but I find it gets really hard to read surprisingly quickly.
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might want to consider other shared primatives.
I can think of other use cases where cross-process pipes, mutexes and so
on could be useful.
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worth broadening out the discussion to other sorts of named
objects? Named Pipes particularly spring to my mind...
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ooking at the above
would not have a lot of guidance as to what might be going on, and could
be forgiven for thinking they were looking at some weird form of set.
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to clarify, and others to contribute, if they wish.
Since what I have asked for is for Vinay to clarify what is wanted, that
involves no effort on my part :-)
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To u
stated it outright.
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Message archived
<https://bugs.python.org/issue38035> at bugs.python.org
<http://bug.python.org/>, which contains more detailed discussion on
the same. I am posting this here after a suggestion from a Python
contributor.
These are very nice statements. What is you actually want?
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current
if x is None:
x = randint(0,9)
a lot easier to understand.
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on with an entirely unnecessary function wrapper?
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ting out
to clients that the answer to any question beginning "Can you just...?"
is "No." It is never "just". Never.
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On 22/05/2020 20:40, Steven D'Aprano wrote:
Imagine the confusion if somebody had variables spam, Spam, sPAM, SPam,
sPAm. Or worse, SPΑM, SPАM and SPAM.
Randall is way ahead of you. https://xkcd.com/2309/
:-)
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des" (auto-indentation after you hit
RETURN) can make more work for you!
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s back now and again, but doesn't seem to
get much traction one way or another.
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On 21/05/2020 22:11, Mike Miller wrote:
The only thing I've seen recently that doesn't is the Linux console,
which I use rarely for admin tasks. (Oddly enough, it does handle right
arrow properly.)
Guess what I use. In conjunction with Emacs, of course :-/
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on holiday in Quebec. I quite
agree!
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that the
Linux UK Keyboard doesn't offer AltGr shortcuts for a c-cedilla. It
makes addressing my colleague François quite a pain :-/
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On 21/05/2020 13:24, Chris Angelico wrote:
On Thu, May 21, 2020 at 9:58 PM Rhodri James wrote:
On 20/05/2020 23:20, James Lu wrote:
There's a thirty year tradition of doing that because there's no
terser way to do it.
Terser does not mean better. In my experience, terser cod
s together like this.
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Message archived
the syntax
-- I'm really not seeing the problem here.
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flag. The former universal newlines flag got separated out
to be a mode parameter all its own when it turned out not to be a simple
flag after all. I seem to remember that separation being somewhat
painful...
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it; for the first, it's an unnecessary
distraction, and for the second the existence of zip_longest() argues
against it.
2) People don't hate zip.strict() as much as I had expected.
3) The PEP needs to come up with an actual argument against
itertools.zip_strict(). The
On 14/05/2020 19:56, Andrew Barnert wrote:
On May 14, 2020, at 10:45, Rhodri James
wrote:
On 14/05/2020 17:47, Andrew Barnert via Python-ideas wrote:
Which is exactly why Christopher said from the start of this
thread, and everyone else has agreed at every step of the way,
that we can’t
not at all clear.
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On 14/05/2020 03:54, Greg Ewing wrote:
On 14/05/20 8:55 am, Richard Damon wrote:
On 5/13/20 2:03 PM, Rhodri James wrote:
I'm sorry, but I think the correct response is to give them a spanking
in code review. I certainly wouldn't pass any code that actually
relied on assert doin
he correct response is to give them a spanking
in code review. I certainly wouldn't pass any code that actually relied
on assert doing anything.
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Unless by "writing code that is
dependent on asserts" you mean something I'm going to disapprove of
strongly :-)
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d "is", people still get muddled. If we
have "==" and "=OMG=" or whatever, that would just be an accident
waiting to happen.
Cheers,
Rhodri
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ctually we are. As Steven pointed out further down the post,
adding a flag to a function that is pretty much always going to be set
at compile time is equivalent to (and IMHO would be better expressed as)
a new function.
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lt to strict=True, but
having the flag is a strong statement that length-checking is an
intrinsic part of zipping. I don't believe that's true, and in
consequence I think adding a flag is a mistake.
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On 05/05/2020 13:53, Henk-Jaap Wagenaar wrote:
Brandt's example with ast in the stdlib I think is a pretty good example of
this.
On Tue, 5 May 2020 at 13:27, Rhodri James wrote:
On 05/05/2020 13:12, Henk-Jaap Wagenaar wrote:
A function that is a "safer" version in some &
rsus zip-with-strict-true.
I'm sorry, I don't buy it. This isn't an edge case, it's all about
whether you care about what your input is. In that sense, it's exactly
like the relationship between zip and zip_longest.
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the chain of argument could you at least trim
the middle out?
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ys know whether he always wants
"strict=True" or "strict=False". That functionality switch is the
smell, and I don't think you convincingly deal with it.
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tes the traceback, I want to get as many hints as possible about what
went wrong.
Then you should read the exception reason. You're still going to have
to think about what your program logic error is, and a separate
exception is going to be less use than an explanatory text string.
-
Isn't the point that you should be approaching a datastructure in Python
thinking about what you want it to do, not how it's implemented
underneath? That sort of micromanagement smacks of premature optimisation.
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information that you may not need at all but will use a lot if you do
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g this thread, and should have a draft posted to the list for
feedback this week.
-1 on the flag. I'd be happy to have a separate zip_strict() (however
you spell it), but behaviour switches just smell wrong.
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use cases
Except for those cases where either the whole dataset needs to be
processed or none of it, which is what people were thinking might be
behind some of the desire for zip_equal(). That you can't do it in the
general case would be a later "well, bugger" stage of the des
le=handle" to "handle=medium_handle" as projects
have crept...
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think ?
Thanks in advance for your replies
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and that's what
people are going to expect.
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nt order so these parameters are definitely bound wrong, and also
that weird `**` that I don't know the meaning of has no bearing on that,
and I'm not going to check with a print() or a debugger".
If I have to go away and look some syntax up, that syntax has slowed me
down. Thi
syntax that nobody else replicated, and I
think that’s happening again here.
It's not just Steven. After dusting my monitor to remove flyspecs, I
still couldn't find a natural way of reading that example. I didn't
visually parse it quite the same, but the excess of punctuation st
ne to this magical knowledge.
Also, your examples are clearly demonstrating that using the shortcut makes
it easier to avoid mistakes.
It shows that using positional parameters makes it easier to make
mistakes, but that's not news.
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ints. We do seem to have got
off-track somewhat ;-)
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way of
basic readability.
I beg to differ. I do find "def foo(a, *, b)" gets in the way of
readability.
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)
foo(bar=, qux=)
```
I wasn't in favour of the original proposal, and that at least had the
excuse of just being for debugging. Imagine how much less I am enthused
by this.
Explicit is better than implicit.
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introduction of enumerate() lo! these many moons ago, I find I
almost never write range(len(x)) as a loop iterable.
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o don't do that, then.
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Message arc
around" is not to do the thing that raises the
exception?
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-world examples that would be improved by
them. That's been lacking to the extent that it sounds like what you're
really saying is "I want to program $LANGUAGE in Python." Since that's
almost always a mistake, you've actually driven me from +0 to -0.5
de only from cow's milk. It can
also be made from goat's milk. Typical pro-bovine/anti-caprid bias! :-)
Ewe are forgetting to separate your sheep from your goats.
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eed have
seen frozen binaries discouraged in the past.
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On 11/03/2020 18:45, Stephen J. Turnbull wrote:
Rhodri James writes:
> We've headed off down the rabbit-hole of filenames for
> justification here, but surely pathlib is the correct tool if you
> are going to be chopping up filenames and path names?
This isn't
seem to be 90% of what people are asking for.
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but it is ASCII-compatible; ASCII characters are encoded as their
7-bit ASCII values. I'm not sure this is a particularly useful
observation, mind you.
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kinda ugly though.
Well, yes. The non-ugly thing would be to make sure your threads are
well behaved ;-)
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and the harder the language is to learn. Just consider
how hard English is to learn as an adult, and notice just how much of
the language is inconsistency after inconsistency.
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ecause
of unexpectedly iterating through a string, it's my own stupid fault.
Almost always I have been doing something over simplistic or
wrong-headed, usually returning a string from a function when I meant to
return a list of (one) string(s) instead.
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much what you said then. Have you not returned to that
mailing list because you no longer feel like part of the community?
I seem to remember saying at the time that if I'd received the message
for Steven as it was stated in public, I would not show up on bended
knee as a supplicant as it
matic R in Python. That on the whole sounds like a bad idea; a
friend of mine use to say he could write FORTRAN in any language but no
one else could read it. Wouldn't it be more pythonic (or more
accurately anything-other-than-R-ic) to use an interface that was more l
On 19/02/2020 16:55, Soni L. wrote:
On 2020-02-18 5:33 p.m., Soni L. wrote:
Similar to len(). Just a shitty wrapper for __valid_getitem_requests__.
Correction: Just a simple wrapper for __valid_getitem_requests__.
Thank you! :-)
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On 19/02/2020 00:26, Steven D'Aprano wrote:
On Tue, Feb 18, 2020 at 08:44:07PM +0000, Rhodri James wrote:
Language, sunshine.
What about it?
Just for the record, I had no issues with Soni's language, but I do
object to attempts to shame him for it. This isn't the Disney Ch
On 18/02/2020 20:33, Soni L. wrote:
On 2020-02-18 5:08 p.m., Rhodri James wrote:
On 18/02/2020 19:43, Soni L. wrote:
It'd be nice to have a __valid_getitem_requests__ protocol that, if
present, yields pairs such that:
for key, value in items(obj):
assert obj[key] == value
for an
he
arbitrary object?
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Messag
characters-to-a-csv-file-with-dictwriter
I think my advice would be a variation on "Don't do that!" If you can
massage your data into the right format before you try writing it, that
would be preferable to having DictWriter mangle your strings in what is
essentially an arbitra
nature of C# (variables are lvalues) that simply isn't
true in Python, which I don't think the OP realised.
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lly if you have a multi-line "if", since you won't have the
visual cue from the left-hand side.
if (first_of_many_tests() and
second_of_many_tests() and
and_so_on() and
last_of_many_tests()):
do_something_muttley()
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On 08/01/2020 18:08, many people wrote lots of stuff...
Folks, could we pick one list and have the discussion there, rather than
on both python-list and python-ideas? Getting *four* copies of Andrew's
emails is a tad distracting :-)
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On 04/12/2019 12:44, Abdur-Rahmaan Janhangeer wrote:
Abdur-Rahmaan Janhangeer
http://www.pythonmembers.club | https://github.com/Abdur-rahmaanJ
Mauritius
On Wed, 4 Dec 2019, 15:16 Rhodri James, wrote:
Which is a problem because...?
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An advantage. If the
pople resurrecting old threads from ten years ago, or even a year ago?
Easy digging of threads.
Which is a problem because...?
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Message archived
. I'm with Chris: -1 on making
life complicated.
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On 20/11/2019 15:28, Richard Damon wrote:
On Nov 20, 2019, at 7:50 AM, Rhodri James wrote:
As context managers, yes, lazy managers make chaining them easier because there's no mess to clean
up if the chain breaks while you are creating it. On the other hand, eager managers like open()
n() can be used
outside a "with" statement and still manage resources perfectly well for
a lot of cases. It a matter of fitness for different purposes, so even
"preferable" is a relative term here.
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often make
the largest contribution to this list by reading more posts and
stifling the impulse to reply to any of them.:-) YMMV, of course.
You used YMMV with malice aforethought, didn't you? :-)
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On 19/11/2019 17:57, Andrew Barnert wrote:
On Nov 19, 2019, at 09:40, Rhodri James wrote:
How about using Paths as file context managers? Just an idle thought.
Then how do you open a Path for writing, or in binary mode, etc.?
With additional parameters and/or methods, obviously
On 19/11/2019 17:50, Soni L. wrote:
On 2019-11-19 3:37 p.m., Rhodri James wrote:
On 19/11/2019 17:12, Brian Skinn wrote:
@jayvdb on GitHub and I are working on a new version of one of my
packages, stdio-mgr (https://github.com/bskinn/stdio-mgr), with a
dramatically expanded API and
__enter__(). That's fixable by writing
your own wrapper class, but having a builtin file context manager that
deferred resource-consuming actions would be a Good Thing™
How about using Paths as file context managers? Just an idle thought.
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hit them.) A quirk of my brain is
that unlike my classmates I couldn't do the same with numbers -- with a
very few exceptions like powers of two, numbers are just collections of
digits to me in a way that words *aren't* collections of letters
by lawyers whom I don't want to wake up, despite it
being nearly 20 years later.
Numquam titillandum advocatus dormiens?
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On 24/10/2019 11:33, Steven D'Aprano wrote:
On Wed, Oct 23, 2019 at 06:01:06PM +0100, Rhodri James wrote:
The proposed:
%w[red green blue]
says that this is something, good luck figuring out what.
You don't need *luck* to figure out what it does, you need five seconds
in the REP
On 23/10/2019 16:16, Steven D'Aprano wrote:
On Wed, Oct 23, 2019 at 03:16:51PM +0100, Rhodri James wrote:
I'm seriously not getting the issue people have with
colours1 = ["red", "green", "blue"]
which has the advantage of saying what it means.
A
I wanted, quote each separately
I'm seriously not getting the issue people have with
colours1 = ["red", "green", "blue"]
which has the advantage of saying what it means.
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or prefer plus over pipe, and I don't think that pipe
is "more accurate".
+1 (as one of the non-newcomers who prefers plus)
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This smells like Perl's quoting operators. I wasn't a big fan of them
even when I was a Perlmonger. Given the choice of "glyph doing
something" and "glyph doing something I understand", I'll take the
latter every time.
--
Rhodri James *-* Kynesim Ltd
_
On 21/10/2019 14:54, David Mertz wrote:
On Mon, Oct 21, 2019, 9:14 AM Rhodri James
The plus operation on two dictionaries feels far more natural as
a vectorised merge, were it to mean anything. E.g., I'd expect
{'a': 5, 'b': 4} + {'a': 3, 'b'
x27;: 8, 'b': 5}
That's only a natural expectation if you also expect the values in your
dict to be addable (in the sense of doing something useful with a "+"
operator). It never occurs to me to make that assumption because a fair
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