.
-Original Message-
From: Abdur-Rahmaan Janhangeer
To: Python
Sent: Tue, Feb 22, 2022 12:32 pm
Subject: Re: Best way to check if there is internet?
Well, nice perspective.
It's a valid consideration, sound theory
but poor practicality according to me.
It you view it like this then betwee
quot;])}
d.values()
dict_values([['aaa', 'bbb', 'ccc'], [['fff', ['ggg']]], 666, {'e', 'u', 'a',
'o', 'i'}])
flatten2list(d.values())
['aaa', 'bbb', 'ccc', 'fff&#x
Shaozhong SHI wrote:
> Can it be divided into several processes?
I'd do it like this:
from time import sleep
from threading import Thread
t = Thread(target=lambda: sleep(1))
t.run()
# do your work here
t.wait()
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I know next to nothing about computer coding nor Python.
However, I am working on a mathematical challenge in which coding is
required to calculate and generate different potential solutions.
Can anyone help? If so, please private message me and we can discuss in
more detail.
Many thanks
run or enter key on the terminal,
> our Python interpreter might get deleted.
Yeah, but by your logic you'd have to check the existence of /usr/bin/python
each time before you run it.
> Though it's nice to go in and catch exceptions,
> if you have a long operation upcoming it
tion.
> So it detected that there is or there is no internet ...
Your application obviously needs to make a certain network connection. Why
don't you just check if the connection can be made? Why would you care if it's
via cable or Wifi?
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ache.append()
because _update() can ever only run in one thread at a time. But maybe I'm
overlooking something.
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se, so
that some screens displayed error messages for a minute or two. Nobody cares
but my pride was piqued and the error logs filled up.
I've had my proposed solution running for a few days now without errors. For me
that's enough but I wanted to ask you guys if I made some logical mistakes.
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a future update.
I don't think that's a problem. If it turns out to be one I'll create a copy of
the data while I hold the lock and pass that back.
>
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C. It may well be optimized in some
places but there are constraints that may well make it hard to optimize
compared to some other implementation without those constraints. In particular,
it interfaces with standard Python data structures at times such as when
initializing from a Python List,
wasted effort
but as a tradeoff, they can do many things in a dynamic way that compiled
programs may not do easily or at all.
Another argument I find is unfair, is some comparisons with what I consider
"mixed" effort. If you have a program that calls various numpy routines using
native
it
in the base python, perhaps as a second executable with a name like pythonn to
signify that it is more numeric. So if you run that, you know you do not need
to add an assortment of modules. I keep seeing programs that just automatically
add numpy and pandas and various graphic modules and
implementation makes a huge change.
Take interpreted languages including Python and R that specify all kinds of
functions that may be written within the language at first. Someone may
implement a function like sum() (just an example) that looks like the sum of a
long list of items is the first item added
problems.
-Original Message-
From: Chris Angelico
To: [email protected]
Sent: Fri, Feb 25, 2022 11:16 pm
Subject: Re: C is it always faster than nump?
On Sat, 26 Feb 2022 at 14:35, Avi Gross via Python-list
wrote:
> But with numpy and more available anyway, it may not be necessary
Chris Angelico wrote:
> Every language learns from every other.
Except Visual Basic, which didn't learn anything from anywhere, and all that
can be learned from it is how not to do it. Ugh.
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m to be running
correctly either. I'm on Python 3.6.8 (though we're about to start an
upgrade to the latest stable, if that in theory may have changes to syslog
handling). I'm mostly ending up here since I'm finding such differences in
response between python modules I'd expect
eed to check your platform and use the
appropriate address (you may need to do this check at runtime if your
application needs to run on several platforms)
Aiming for this to be being picked up on the same computer I'm running the
test script (Python -> Logging -> SyslogHandler -> Mac
-
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o JSON or String.
I've done exactly this. Since my data was strictly ASCII I decided to go for
JSON. But in the end you're the only one who can decide this because only you
know the data. That's why you won't find any hard and fast rule for this.
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acters in utf8mb4 character set.
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t;us-east-2"), ("Windows",
"us-east-1"), "Windows", "us-east-2')]
The lists can be different lengths or can be 0 length. Tried a few
different things with itertools but have not got just what I need.
TIA!
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or other variants.
You pointed out, validly, that if either of the original lists is empty, it
fails. True.
But that opens the question of what happens when any random thing is thrown
there such as "hello" which Python happily treats as ['h', 'e', 'l', &
ld expect as the default if you are using the C
> API.
>
> What you do not see used in the SyslogHandler() is the import syslog
> and hence its nor using openlog() etc from syslog API.
>
> Barry
>
>
>
> >hp
> >
> > --
> > _ | Peter J. Holz
On 03/03/2022 14:07, Larry Martell wrote:
On Wed, Mar 2, 2022 at 9:42 PM Avi Gross via Python-list
wrote:
Larry,
i waited patiently to see what others will write and perhaps see if you explain
better what you need. You seem to gleefully swat down anything offered. So I am
not tempted to
not about you asking how to solve a very reasonable problem
in Python. It was about the process and what was disclosed and then the
expectation that we should have known about things not shared. Certainly
sharing too much is a problem too. Your title alone was very concrete asking
about 2 lists.
is such a thing
in Python?
I have used it maybe once. My issue with this construct is that
calling the second block `else` doesn't make sense; a much more
sensible name would be `then`.
Now, imagine a parallel universe, where the for-else construct would
have a different behavior:
: Chris Angelico
To: [email protected]
Sent: Thu, Mar 3, 2022 12:40 pm
Subject: Re: Timezone jokes (was: All permutations from 2 lists)
On Fri, 4 Mar 2022 at 03:29, Tim Chase wrote:
>
> On 2022-03-03 06:27, Grant Edwards wrote:
> > On 2022-03-03, Chris Angelico wrote:
> > &
Grabbing latest python that does work. Good we're about to get out of the
stone ages a bit here.
So findings:
Syslog - works in 3.10, broken against monterey in 3.6.
Logging.Handlers.Sysloghandler - is broken in both against Monterey.
Will bug it for the tracker. Thanks for the fee
#x27; needs vary. I can't even remember the last time
I've needed something as you suggest above - certainly far less
often than I need 'for...else' as it is now.
> What are your thoughts? Do you agree?
I don't agree. But it doesn't really matter if anyone agrees or not,
age must be added to sparingly and with so many requests, perhaps
only a few non bug-fixes can seriously be considered.
-Original Message-
From: Akkana Peck
To: [email protected]
Sent: Thu, Mar 3, 2022 5:33 pm
Subject: Re: Behavior of the for-else construct
computermaster360 writes
Cliffe
On 03/03/2022 23:07, Avi Gross via Python-list wrote:
The drumbeat I keep hearing is that some people hear/see the same word as
implying something else. ELSE is ambiguous in the context it is used.
And naturally, since nobody desperately wants to use non-reserved keywords,
nobody seems
l programs are limited to [{(
and maybe < and their counterparts. This leads to odd Python behavior (other
languages too) where symbols are re-used ad nauseam. { can mean set or
dictionary or simply some other way to group code.
So I would love to see some key that allows you to do something li
g a function as `[`(args) instead of [args] and
rewriting it. Python plays lots of similar games, such as the decorators you
like to use. In many places, Python makes it easier for me to do things.
There really are more like three kinds of Programmers. Some see the world one
way and some another w
On 04/03/2022 00:34, Chris Angelico wrote:
On Fri, 4 Mar 2022 at 10:09, Avi Gross via Python-list
wrote:
The drumbeat I keep hearing is that some people hear/see the same word as
implying something else. ELSE is ambiguous in the context it is used.
What I'm hearing is that ther
On 04/03/2022 00:38, Avi Gross via Python-list wrote:
Rob,
I regularly code with lots of comments like the one you describe, or mark the
end of a region that started on an earlier screen such as a deeply nested
construct.
So do I (and not just in Python). It's good practice.
I hav
On 04/03/2022 00:43, Chris Angelico wrote:
On Fri, 4 Mar 2022 at 11:14, Rob Cliffe via Python-list
wrote:
I find it so hard to remember what `for ... else` means that on the very
few occasions I have used it, I ALWAYS put a comment alongside/below the
`else` to remind myself (and anyone
On 04/03/2022 01:44, Ethan Furman wrote:
On 3/3/22 5:32 PM, Rob Cliffe via Python-list wrote:
> There are three types of programmer: those that can count, and those
that can't.
Actually, there are 10 types of programmer: those that can count in
binary, and those that can't.
#x27;if a break occurred', then
at least only one debtor is killed, as an example to the others, and no
Exception will occur in the unlikely event of "debtors" being empty.
Happy fund-raising!
Rob Cliffe
There's something in this.
ChrisA
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to hold objects holding a set
and not confuse the notations for sets and dictionaries as Python ended up
doing. (Yes, I know it is NOT confusing in some ways as one holds key:value
pairs and the other just value, but making an empty set now requires the
notation of set() while an empty dictionary i
an ELSE dangling.
-Original Message-
From: Jach Feng
To: [email protected]
Sent: Thu, Mar 3, 2022 9:22 pm
Subject: Re: Behavior of the for-else construct
I never feel confused by "else" because I always think it in "break...else",
not "for...else".
as discussed, you could do an IF statement to check if closet is empty but
for iterators, it gets ...
-Original Message-
From: Dieter Maurer
To: Rob Cliffe
Cc: [email protected]
Sent: Fri, Mar 4, 2022 2:12 am
Subject: Re: Behavior of the for-else construct
Rob Cliffe wrote at 2022-3
s were not allowed to have embedded spaces, it made
sense to treat them like tokens that could be broken up at whitespace. As
mentioned, languages (or other programs) would often parse a command line and
create something like this for the main program in C with suitable version in
Python and other
s useful because it is more direct or other reasons.
in the case we are discussing, what are the scope issues in:
eye = 1
for eye in ... :
pass
else:
eye = None
It looks like all references to eye refer to the same object. Some other
methods we have touched on (or others may bring up) may
erwise need keywords. Anything between braces can be an extension of the
language in a context where users do not put their own variable names.
But again, any language defined can be set up to do things their own way. In
Python, I believe the contents of a loop are not examined at all if skipped
On 04/03/2022 20:52, Avi Gross via Python-list wrote:
I have an observation about exception handling in general. Some people use
exceptions, including ones they create and throw, for a similar idea. You might
for example try to use an exception if your first attempt fails that specifies
situations where almost all programs are found in the first component of
PATH, perhaps the exception approach is not horrible. It may even at times be
done with less coding effort than other alternatives. Not my preferred way, of
course.
-Original Message-
From: Rob Cliffe via Python-list
last name in German
notation as a variable in Python now:
Groß = 144
Groß / 12
12.0
But even if I was German (and despite living in Austria for a year, I am not) I
might want to write some things in French which might not be on that Keyboard,
unless it includes everything in ISO 8859-1, albeit
On 05/03/2022 01:15, Cameron Simpson wrote:
I sort of wish it had both "used break" and "did not use break"
branches, a bit like try/except/else.
And "zero iterations".
Rob Cliffe
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ng. I hope the idea
comes across, even if you disagree with my indenting or exact method.
Constructs like the above do in theory allow some really complex matching and
often in a way easier to understand than having endless clauses added below the
for group.
But as repeatedly stated, P
I am not sure how we end up conversing about PASCAL on a Python forum. But it
is worth considering how people educated in aspects of Computer Science often
come from somewhat different background and how it flavors what they do now.
I paid no attention to where PASCAL was being used other than
Dear Python officer,
Please I am new to programming. I have justinstalled the python 3.10.2. After
the installation, I was able to locate thePython Shell but unable to locate
IDLE despite checking it before downloading in the python installation folder.
I also reinstalled Python and checked
and other languages
to undergrads ;-)
-Original Message-
From: Dennis Lee Bieber
To: [email protected]
Sent: Sat, Mar 5, 2022 7:00 pm
Subject: Re: Behavior of the for-else construct
On Sat, 5 Mar 2022 21:40:08 + (UTC), Avi Gross
declaimed the following:
>I am not sure how we end
rly
interested in proofreading, the result tends to be that I simply get annoyed
and the one pointing it out is taken as wandering off topic even more than I do.
Python is named after a snake right? So is it upper case or lower case or mixed
case? No, wait, it is named after Monty Python. But what mad
I am using the C API in Python 3.8 with the nltk library, and I have a problem
with the return from a library call implemented with
PyObject_CallFunctionObjArgs.
This is the relevant Python code:
import nltk
from nltk.corpus import gutenberg
fileids = gutenberg.fileids()
sentences
the same way as ‘’.join, and if not then (2) how can I
strip characters from a string object in the C API?
Thanks.
Mar 6, 2022, 17:42 by [email protected]:
> On 2022-03-07 00:32, Jen Kris via Python-list wrote:
>
>> I am using the C API in Python 3.8 with the nltk
The PyObject str_sentence is a string representation of a list. I need to
convert the list to a string like "".join because that's what the library call
takes.
Mar 7, 2022, 09:09 by [email protected]:
> On Tue, 8 Mar 2022 at 04:06, Jen Kris via Python-list
> wrote:
&g
string representations are not the same – or at least the
>> PyUnicode_AsEncodedString is not the same, as each item is surrounded by
>> single quotes.
>>
>> Assuming that the conversion to bytes object for the REPR is an accurate
>> representation of str_sentenc
of a
dictionary object and a string.
The relevant part of the Python code is:
half_slice = int(len(dictdata) * 0.5)
subdata_a = dictdata[half_slice:]
subdata_b = dictdata[:half_slice]
This is what I’ve done so far with the C API:
int64_t Calc_Slices(PyObject* pDictdata, int64_t records_count
s.com:
> On 2022-03-12 21:24, Jen Kris via Python-list wrote:
>
>> I have a C API project where I have to slice a list into two parts.
>> Unfortunately the documentation on the slice objects is not clear enough for
>> me to understand how to do this, and I haven’t found e
pDictData, despite the name, is a list of 2-tuples where each 2-tuple is a
dictionary object and a string.
Mar 12, 2022, 13:41 by [email protected]:
> On Sun, 13 Mar 2022 at 08:25, Jen Kris via Python-list
> wrote:
>
>> PyObject* slice = PySlice_New(PyLong_FromLong(0)
;s a borked one, kaboom).
>
> ChrisA
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Thanks for PySequence_InPlaceConcat, so when I need to extend I'll know what to
use. But my previous email was based on incorrect information from several SO
posts that claimed only the extend method will work to add tuples to a list. I
found that's wrong -- even my own Python cod
, use a macro preprocessor, to parse the code once
to make various textual changes without any real understanding of thelanguage
and produce output ready for a compiler or interpreter phase. Python has
nothing really like that albeit I can think of some things as well asgimmicks
and tricks that can
ve in a language like R,
you can add the namespace to the environment and use it in read-only mode
but writing to a resulting variable like "col1" makes a new local variable and
does
not make any change to the underlying filed in a data.frame.
I mean (again this is not Python code) that:
mydat
I sent George a private reply as discussing other languages gets rapidly
off-topic.
I want to add a small addendum here about the technique he used and a Dave Neal
and others are trying, a way to imagine things that is more compatible with how
a language like Python works so it meets expectation
Greg,
Yes, what I describe may not be common and some code goes to serious lengths
precisely to make direct connections to internals on an object hard to access.
But Python indeed allows and perhaps encourages you to use what you consider
side effects but perhaps more. There are many dunder
Hi,
We develop Pyto - the first python class with an animated character that helps
you learn the basics concepts of Python Language like you're playing video game
- and we'd like it to be implemented.
Potential is limitless and can reach unlimited number of new users who will
the
other choices.
Python made lots of choices early on and then tried to graft on ever more
features, sometimes well and sometimes not optimally. The same is true
for so many other languages. A carefully designed new language built now
might analyze and make changes.
I would even argue that a new
Chris:
> No, I would say that a preprocessor of that sort isn't necessary to a
> Python-like language. If you really want one, it's honestly not that
> hard to do; remember, "preprocessor" means that it processes the
> source code before the main language sees it
s like [~* and so on with no real
relationship to the language being employed. You can often write code
using an identical regular expression and use it with functions in Python,
Perl, R, C++ and lots of other languages. Similarly, the printf() family has a
guiding
string that uses symbols like
Yes, Chris, you can do all kinds of useful things in Python and I can not make
much of
a case for requiring a pre-processor. The main reason would be to make code
that interprets faster or produces a smaller file of Python commands.
All I was saying was that there might be a scenario where a
Hi
You can get all methods of your object and check the method you want to
call is there or not.
|methods = [method for method in dir() if
callable(getattr(, method))] if 'method_you_need' in
methods: . // BR |
27.03.2022 12:24, Manfred Lotz пишет:
Let's say I have a Pyth
And neither 'mypy --strict' or 'pyre' can find such error.
I guess there is not warranty to detect such sitations in huge codebase.
It's python dynamic nature.
May be dynamic checkers can help in such situations ...
27.03.2022 20:07, Manfred Lotz пишет:
On 3/27/22 18:
The question seems to be how or whether you can check Python code in
advance for any instances of a method for an object being called that is
not instantiated. Right?
As Kirill points out, Python can be quite dynamic. I can think of oodles
of ways checking would not work well in a static
ntu
for servers is that Ubuntu wants to be up to date. So Ubuntu starts
very close to Debian security wise, but will shift rapidly.
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Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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;
> asyncio.run(long())
> print('after asyncio.run')
>
> The final print does not come out until after long() completes.
>
> Is there any way to do this?
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>
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19:10, Larry Martell пишет:
import asyncio
import time
async def long():
for i in range(100):
time.sleep(10)
asyncio.run(long())
print('after asyncio.run')
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Hi
30.03.2022 21:44, Larry Martell пишет:
On Wed, Mar 30, 2022 at 2:40 PM Kirill Ratkin via Python-list
wrote:
Hi again,
I changed a bit your example and it works as you expected I hope.
import asyncio
async def long():
for i in range(100):
await asyncio.sleep(10
"Peter J. Holzer" writes:
> On 2022-03-28 15:35:07 +0200, Cecil Westerhof via Python-list wrote:
>> "Loris Bennett" writes:
>> > Ubuntu is presumably relying on the Debian security team as well as
>> > other volunteers and at least one compan
In Python when the output of a script is going to a pipe stdout is
buffered. When sending output to tee that is very inconvenient.
We can set PYTHONUNBUFFERED, but then stdout is always unbuffered.
On Linux we can do:
PYTHONUNBUFFERED=T script.py | tee script.log
Now the output is only
rd policy (there are exceptions) on most distros is to stay with
> the same version of any package for the entire lifetime. So for example,
> Ubuntu 20.04 was released with Apache 2.4.41 and Python 3.8.10 and
> Debian 11 was released with Apache 2.4.53 and Python 3.9.2 and they are
> still o
ething like this instead?
data.get_deep("users", 0, "address", "street")
and also, instead of this
try:
result = data["users"][0]["address"]["street"]
except KeyError, IndexError:
result = "second star"
write this:
data.get_deep("users", 0, "address", "street", default="second star")
?
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and also, instead of this
try:
result = data["users"][0]["address"]["street"]
except KeyError, IndexError:
result = "second star"
write this:
data.get_deep("users", 0, "address", "street", default="second star")
?
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Betty Hollinshead writes:
> "Memoising" is the answer -- see "Python Algorithms" by Magnus Lie Hetland.
> In the mean time, here a simplified version of "memoising" using a dict.
> This version handles pretty large fibonacci numbers!
>
> # fibonac
ult)and a value passed back up the
chain. For any errors alongthe way, the default would be returned.
Is this closer to the spirit of the request? I view this versionof nested
dictionaries as a sort of tree structure with variablebranches along the way.
So an approach like this could makesense
Hello,
Yes, I misunderstood as well because started to think about pattern
matching which is good but this is not subject the question was about.
Sorry for my mistake.
Because question was about 'builtin' function which means stdlib
function implemented in python itself or
ns offered.
-Original Message-
From: Kirill Ratkin via Python-list
To: [email protected]
Sent: Mon, Apr 4, 2022 3:40 am
Subject: Re: dict.get_deep()
Hello,
Yes, I misunderstood as well because started to think about pattern
matching which is good but this is not subject the question
cursive':
return rec(n)
raise ValueError(f'Got a wrong function implementation type: {type}')
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Senior Software Engineer
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Dear Python team,
I am trying to find out how to make my Python programs into executable files
(.exe, I presume) using Pyinstaller. I searched on line for how to do this (the
document I came across is headed Data to Fish), and it seemed that Step 1 was
to download the most recent version of
the variable does not have the
default value, but the value it had when the function returned.
Does python has something like that?
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Senior Software Engineer
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'day' it means '86400
seconds'.
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On 2022-04-14, MRAB wrote:
> On 2022-04-14 16:22, Jon Ribbens via Python-list wrote:
>> On 2022-04-14, Paul Bryan wrote:
>>> I think because minutes and hours can easily be composed by multiplying
>>> seconds. days is separate because you cannot compose days from se
r example to 43),
> the next time the function is called the variable does not have the
> default value, but the value it had when the function returned.
> Does python has something like that?
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Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
--
sed
something like howMany and verified the number was an integer larger than 0.
As for getting the second largest number, there is nothing wrong with
determining it the hard way. Of course for some people, it is more intuitive to
sort the uniqued data and simply choose the 2nd entry from the e
On 2022-04-16, Peter J. Holzer wrote:
> On 2022-04-14 15:22:29 -, Jon Ribbens via Python-list wrote:
>> On 2022-04-14, Paul Bryan wrote:
>> > I think because minutes and hours can easily be composed by multiplying
>> > seconds. days is separate because you canno
On 2022-04-16, Jon Ribbens wrote:
> On 2022-04-16, Peter J. Holzer wrote:
>> Python missed the switch to DST here, the timezone is wrong.
>
> Because you didn't let it use any timezone information. You need to
> either use the third-party 'pytz' module, or in Py
On 2022-04-16, Peter J. Holzer wrote:
> On 2022-04-16 13:47:32 -, Jon Ribbens via Python-list wrote:
>> That's impossible unless you redefine 'timedelta' from being, as it is
>> now, a fixed-length period of time, to instead being the difference
>> bet
On 2022-04-16, Peter J. Holzer wrote:
> On 2022-04-16 14:22:04 -, Jon Ribbens via Python-list wrote:
>> On 2022-04-16, Jon Ribbens wrote:
>> > On 2022-04-16, Peter J. Holzer wrote:
>> >> Python missed the switch to DST here, the timezone is wrong.
>> >
Python world is Vapoursynth:
<https://github.com/vapoursynth/vapoursynth>
<http://www.vapoursynth.com/doc/index.html>
I runs with Cython and generally pipes to something like ffmpeg which
creates the final video file so it may be a more complex than you want
but it is capable of th
tonk style piano, Ira Ironstrings (don't know real
name) played banjo.]
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