ld modify the last attempt to open the file twice, which would
work, but seems like a kludge (subject to race condition, inefficient).
Is there a better / more Pythonic solution?
Best wishes
Rob Cliffe
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> On Apr 29, 2024, at 12:23 PM, jak via Python-list
> wrote:
>
> Hi everyone,
> one thing that I do not understand is happening to me: I have some text
> files with different characteristics, among these there are that they
> have an UTF_32_le coding, utf_32be, utf_16_le, utf_16_be all of them
If you look up the documentation for youtube-dlp, you may find that you
can use that module directly, and not need the ClipGrab wrapper at all
(though it may provide some benefits if you can get it working again).
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On 12/28/2023 12:20 AM EST rbowman via Python-list
<[1]python-list@python.org> wrote:
On Wed, 27 Dec 2023 03:53:42 -0600, Greg Walters wrote:
The biggest caveat is that the shared variable MUST exist before it
can
be examined or used (not surprising).
Read the Fine context manager documentation.
What “with with_expression as var” does is effectively:
ob = with_expression
var = ob.__enter__()
And then at the end of the with, does a
ob.__exit__()
(With some parameters to __exit__, that could just be None, None, None for the
simplest case).
N
Read the Fine context manager documentation.
What “with with_expression as var” does is effectively:
ob = with_expression
var = ob.__enter__()
And then at the end of the with, does a
ob.__exit__()
(With some parameters to __exit__, that could just be None, None, None for the
simplest case).
N
g (set to True
when you initialize), and look it up with getattr() with a default value
of False.
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> On Aug 17, 2023, at 10:02 AM, c.buhtz--- via Python-list
> wrote:
>
> X-Post: https://stackoverflow.com/q/76913082/4865723
>
> I want to display one string in its original source (untranslated) version
> and in its translated version site by site without duplicating the string in
> the pyt
ght. But
*Right.__init__()* is called twice. What's going on here?
Thanks,
Peter
Because the MRO from Bottom is [Bottom, Left, Right, Top] so super() in
Left is Right. It doesn't go to Top as the MRO knows that Right should
go to Top, so Left needs to go to Right to init everything,
How are you trying to “Open” python? If you get that option screen, that sounds
like you are trying to run the installer again.
Knowing your Operating System would be very helpful. Python is normally run
from the command line, or since you have the PyCharm IDE, it can run python on
the program
probably best to not actually allow.
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type, and if so, converts its value to that type and
does the operation.
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ld be to use the concept of an
"abstract base" which allows the base to indicate that a derived class
needs to define certain abstract methods, (If you need that sort of
support, not defining a method might just mean the subclass doesn't
support some optional behavior defi
to the attention of the IEEE. I
would like to know their response to it.
That is why they have developed the Decimal Floating point format, to
handle people with those sorts of problems.
They just aren't common enough for many things to have adopted the use
of it.
Stephen Tucker.
-
ode Code Points, and you can define
string literals of that type with
U"string" notation.
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Bytes if the data is
all Latin-1, as a sequence of 16-bit words if the data all fits on th
BMP, and a sequence of 32 bit words if it has a value outside the BMP.
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you phrase things does give me that nagging
feeling that you still might be just a bit off.
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-- Albert Einstein
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> On Jan 4, 2023, at 8:56 AM, c.bu...@posteo.jp wrote:
>
> Hello,
>
> first I have to say that in my current and fresh humble opinion the
> often seen "--verbose" switch in command line applications should
> affect only the messages given to the users. This means messages on
> "stdout". That is
> On Jan 3, 2023, at 10:38 AM, c.bu...@posteo.jp wrote:
> Hello,
>
> this posting isn't about asking for a technical solution. My intention
> is to understand the design decision Python's core developers made in
> context of that topic.
>
> The logging module write everything to stderr no mat
apply, but the new test criteria would
need to be computed based on computing the exected results and expected
variation in that result, largely based on various cross correlations of
the numbers.
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to the current x.y object.
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On 8/6/22 8:12 AM, Chris Angelico wrote:
On Sat, 6 Aug 2022 at 22:08, Richard Damon wrote:
On 8/6/22 12:01 AM, Chris Angelico wrote:
On Sat, 6 Aug 2022 at 13:54, Dan Stromberg wrote:
On Fri, Aug 5, 2022 at 12:54 PM Grant Edwards
wrote:
In C, this doesn't do what it looks like
erate many warnings, either you have warnings
enabled that you don't care about, or your code is doing things you have
told the complier you shouldn't do.
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. It says that
often a month later than a given day isn't the same day of the month,
but does make some operations less surprising. (This is hard to do to a
date expressed as year-month-day, but trivial in some other formats like
a timestamp.)
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thing to do with understanding how to grab podcasts. The system is
working very well for that.
Footnote:
“What rhymes with orange?”
“No, it doesn’t..”
-Original Message-
From: Richard Damon On Behalf Of Richard Damon
Sent: Saturday, May 28, 2022 11:37 PM
To: Steve GS
Subject: Re: Autom
t the material is surely under Copyright, so be careful what you do with it.
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python found), you
should be able to simpify that to
python -m pip install --upgrade
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r isn't the
sort of program that makes sense to make a desktop icon for, as it is a
command line utility.
Perhaps making an icon for IDLE, if it has also been installed, but then
the issue becomes would people recognize 'IDLE' as 'Python' to click on.
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On 2/25/22 2:47 PM, Chris Angelico wrote:
On Sat, 26 Feb 2022 at 05:49, Richard Damon wrote:
On 2/25/22 4:12 AM, BELAHCENE Abdelkader wrote:
Hi,
a lot of people think that C (or C++) is faster than python, yes I agree,
but I think that's not the case with numpy, I believe numpy is faster
erson without that level of care and effort.
There are similar package available for many languages, including C/C++
to let mere mortals get efficient numerical processing.
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place operators that if a type doesn't support
the inplace operator, it is automatically converted into the equivalent
assignment with the binary operator?
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hat don't need
an installer.
Likely, just copying an EXE file from an outside source may still be
against the rules (and needs approval), but some think if they can do it
and no one complains, it must be ok. On the other hand, they may have
given approval, knowing the source.
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ssy to exactly the order you do things, the
cases where the difference is intended is likely fairly small.
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> On Sep 5, 2021, at 6:22 PM, Peter J. Holzer wrote:
>
> On 2021-09-04 10:01:23 -0400, Richard Damon wrote:
>>> On 9/4/21 9:40 AM, Hope Rouselle wrote:
>>> Hm, I think I see what you're saying. You're saying multiplication and
>>> division in
On 9/4/21 9:40 AM, Hope Rouselle wrote:
> Chris Angelico writes:
>
>> On Fri, Sep 3, 2021 at 4:58 AM Hope Rouselle wrote:
>>>
>>> Hope Rouselle writes:
>>>
Just sharing a case of floating-point numbers. Nothing needed to be
solved or to be figured out. Just bringing up conversation.
On 8/27/21 3:37 AM, Loris Bennett wrote:
> Richard Damon writes:
>
>> On 8/26/21 6:01 AM, Loris Bennett wrote:
>>> Hi,
>>>
>>> When using configargparse, it seems that if a value is to be read from a
>>> config file, it also has to be defined as a
>
> Is there an elegant way to do this?
>
> Cheers,
>
> Loris
>
Look at the read() member function to supply the file name to read. Then
in the config object there will be sections for each section in the
config file. No need for any of these to be 'options'
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By the rules of Unicode, that character, if not the very first character of the
file, should be treated as a “zero-width non-breaking space”, it is NOT a BOM
character there.
It’s presence in the files is almost certainly an error, and being caused by
broken software or software processing file
ng sure that the rule set covers
every value in the data array, and never gives one input value two
different y values.
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ou mutate the object the parameter was bound to, the calling
function will see the changed object. (This requires the object to BE
mutateable, like a list, not an int)
If you rebind that parameter to a new object, the calling function
doesn't see the change, as its name wasn't rebound.
On 5/20/21 1:58 AM, Chris Angelico wrote:
> On Thu, May 20, 2021 at 2:02 PM Richard Damon
> wrote:
>> Given the following definition of classes, I am getting an unexpected
>> error of :
>>
>> TypeError: __init__() missing 2 required keyword-only arguments:
>
On 5/20/21 3:24 AM, Peter Otten wrote:
> On 20/05/2021 06:00, Richard Damon wrote:
>
>> class GedcomHead(Gedcom0Tag):
>> """GEDCOM 0 HEAD tag"""
>> def ___init___(self, *, parent):
>
> An __init__ with three underscores; you m
ms be
requiring the parameters for the __init__ call of the base class too, even
though there is a call to it through the super().__init__()
Is this expected?
Can derived classes not provide values for parameters to construct the base
classes?
Is there something funny because I am making the call from a member of that
base class?
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On 5/8/21 10:49 AM, mishrasamir2...@gmail.com wrote:
>Sir/madam,
>
>Please provide me the latest version of pycharm quickly.
>
>Samir Mishra
You just need to go to the jetbrains web site and it is available there.
They even have a free version there.
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On 5/6/21 9:44 AM, Jon Ribbens via Python-list wrote:
> On 2021-05-06, Richard Damon wrote:
>> On 5/6/21 6:12 AM, Jon Ribbens via Python-list wrote:
>>> I think you're fundamentally missing the point that the newsgroup is
>>> *already gatewayed to the mailing li
Usenet being a distributed system, doesn't support this model. Either
anybody can inject a message from wherever they are, no all messages are
sent to be reviewed, the unmoderated and moderated is a VERY sharp line.
In Usenet terms, lists like this would be described as loosely
robo-moderated. And
On 5/6/21 6:12 AM, Jon Ribbens via Python-list wrote:
> On 2021-05-06, Richard Damon wrote:
>> On 5/5/21 10:44 PM, Jon Ribbens via Python-list wrote:
>>> On 2021-05-06, Richard Damon wrote:
>>>> As someone with a long usenet background, converting the existing gr
On 5/5/21 10:44 PM, Jon Ribbens via Python-list wrote:
> On 2021-05-06, Richard Damon wrote:
>> On 5/5/21 9:40 PM, Jon Ribbens via Python-list wrote:
>>> On 2021-05-06, Paul Bryan wrote:
>>>> What's involved in moderating c.l.p? Would there be volunteers willin
ssions to the group, emailed to it, and people would need to log
into the email account on that computer to approve all the posts, or a
robot could perhaps be setup to auto-approve most based on some rules.
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On 4/1/21 6:41 PM, 2qdxy4rzwzuui...@potatochowder.com wrote:
> On 2021-04-01 at 18:10:46 -0400,
> Richard Damon wrote:
>
>> On 4/1/21 5:47 PM, D.M. Procida wrote:
>>> D.M. Procida wrote:
>>>
>>>> Hi everyone, I've created <https://github.com/
logic to them - the movement of A determines that of B which
> determines that of C which determines that of D which finally also
> affects the movement of A.
>
> Any thoughts or wise ideas?
>
> Daniele
If you keep track of the positions as a floating point number, the
precision will be more than you could actually measure it.
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I am not positive that its description
exactly matches what .title() produces, but it close, and the way it is
written, "Python's".istitle() is False, as the s at the end needs to be
uppper case to satisfy as ' is uncased, so the next cased character must
be upper case.
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On 3/21/21 10:28 PM, Chris Angelico wrote:
> On Mon, Mar 22, 2021 at 12:26 PM Richard Damon
> wrote:
>> On 3/21/21 7:31 PM, MRAB wrote:
>>> On 2021-03-21 22:30, Chris Angelico wrote:
>>>> On Mon, Mar 22, 2021 at 9:04 AM Grant Edwards
>>>> wrot
Help on method_descriptor:
>
> title(self, /)
> Return a version of the string where each word is titlecased.
>
> More specifically, words start with uppercased characters and all
> remaining
> cased characters have lower case.
>
> '\N{LATIN CAPITAL LETTER DZ}', '\N{LATIN SMALL LETTER DZ}' and
> '\N{LATIN CAPITAL LETTER D WITH SMALL LETTER Z}' are all digraphs, so
> is it correct to say that .title() uppercases the first character?
> Kind of.
I think the clarification calling them upper cased characters is close
enough considering that there are only 31 title cased characters, all
digraphs.
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amin
One important thing to remember is that there ARE a few characters that
are themselves 'Title case', so we can't live with just upper and lower.
These all are 'digraphs', i.e. look like two letters, but this glyph
does act as a single character for many purposes. One
built in title() function is basically an intentionally 80%
solution. It handles the simple cases simply, and if you might have the
more complicated cases, you have to handle that yourself because to
specify what the 'right' answer would be is basically impossible to do
in general (becaus
On 3/12/21 8:58 AM, Chris Angelico wrote:
> On Sat, Mar 13, 2021 at 12:11 AM Richard Damon
> wrote:
>> On 3/12/21 12:31 AM, Chris Angelico wrote:
>>> On Fri, Mar 12, 2021 at 3:53 PM Cameron Simpson wrote:
>>>> For me, try/except is for when something might rea
r 'undefined behavior'.
It is reasonable to skip the input assert if it becomes too expensive
for benefit it provides, or if something else will catch the error. This
likely actually applies to a lot of Python code, so it may seem that it
doesn't apply.
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e job. I was swearing when fighting with it with padding lol.
>
> --
> Thanks
One thing to remember is that span is sort of like range, range(3) is
[0, 1, 2]
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herit or has been specifically given a different value.
General convention is that modules will use their name as the name of
their logger, as that is generally unique.
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creating it each time. Simplest is
probably to link the Label to a StringVar instead of a fixed text and
updating the variable to change the text. You can also (I believe) go
into the Label and change the text it has with a configuration call.
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ds a lot on how everything was installed and how the path was
setup. You will at least need the version 2 and version 3 pythons to be
given different names, like python3 and then start the python 3 scripts
with python3 my_script.py
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On 1/8/21 6:10 PM, pascal z via Python-list wrote:
> any way to attach a file because I loose indentation?
Don't post via googlegroups, it thinks the world is HTML, which treats
spaces in a funny matter.
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'menu'] = menubar # attach it to the top level window
> ^
> yet that's the syntax he prints on page 84 (and has in the book's code
> supplement).
>
> Why am I getting an invalid syntax error here?
>
> TIA,
>
> Rich
Because it is the wrong syn
out on
Dec 30, 2019, which was the first day of the ISO week bsed 2020, and he
ended it with a comment that if 2019 wasn't going so well, you could
always just use ISO to get an early start on 2020.
Apparently a lot of people were getting this recommended a number of
months later, and people were commenting how that line just was not
aging well. And we couldn't use that te get out of 2020, as 2020 is a
long year, and ISO 2021 didn't start until Jan 4th.
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't really need to do this as a two-level selection:
>
> import random
> animal = ['koala', 'kangaroo']
> fruit = ['banana', 'apple']
> result = random.choice(animal + fruit)
> print(result)
It depends on what distribution of
> kangaroo
>
> --
> Thanks
random.choice doesn't return 'a variable' but an object. Which is the
same object that one of the variables that you used.
IF you wanted to use words, then you could have made kinds = {'animals',
'fruits'} and
terns is probably
beyond what a regex could handle.
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in comments or display names,
but just a base email address isn't that hard).
Many people do still get it wrong.
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it meets the SYNTAX of an email address isn't THAT hard,
but there are a number of edge cases to worry about.
Validating that it is a working email address (presumably after
verifying that it has a proper syntax) is much harder, and basically
requires trying to send to the address, and to really conf
On 11/13/20 12:12 PM, ChalaoAdda wrote:
> On Fri, 13 Nov 2020 12:04:53 -0500, Richard Damon wrote:
>
>> On 11/13/20 11:42 AM, ChalaoAdda wrote:
>>> On Fri, 13 Nov 2020 16:04:03 +, Stefan Ram wrote:
>>>
>>>> ChalaoAdda writes:
>>>>
k. I got the point. So what do I need to do access the variable? How do
> I return a value from that function?
>
> Thanks.
The problem is that you are accessing the variable BEFORE the box has
been put up and the user clicking on it. That doesn't happen until the
mainloop() call. You need to delay the opening and reading of the file
till the filedialog has been used and returned.
Perhaps on_openfile could open and read the file.
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talized name,
and avoid the name conflict. It just says that in your code, to use the
class you either need to use Datatime or datetime.datetime
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;t see much need for:
import MODULE
from MODULE import *
as if you are bringing in ALL the names into the current module name
space, when will you need to use the module.symbol notation?
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On 10/8/20 7:31 PM, Elliott Roper wrote:
> First problem: I can no longer say
> Obfuscated@MyMac ~ % python3 pip -m list
isn't that supposed to be python3 -m pip list
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s, functions and classes have a scope, control structures do not. If
control structures created a scope it would be ugly.
You do need to watch out about the difference between classical
'variables' and pythons name binding when you deal with mutable objects;
For example:
a = []
b = a
a.append(1)
print(b)
give [1] as a and b are bound to the same object, even though you want
to think of them as different variables.
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Parenthesis don't always make a tuple (and in fact aren't needed to make
them)
('first') is just the string value 'first', inside a set of parenthesis
to possible affect order of operations.
For 1 element tuples, you need a trailing comma, like ('first,) and in
many places it also could be just 'first',
just like your first example could be just for n in 'first', 'second':
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Jovial Lian
>
Sounds like you keep re-running the installer rather than the installed
version of python.
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arted as _list[2], and with your code, when he gets
half way done he will hit an index error as he tries to delete _list[26]
from a list with only 25 elements.
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On 9/1/20 9:03 AM, Chris Angelico wrote:
> On Tue, Sep 1, 2020 at 10:57 PM Richard Damon
> wrote:
>> On 8/31/20 6:05 PM, Chris Angelico wrote:
>>> On Tue, Sep 1, 2020 at 5:08 AM Richard Damon
>>> wrote:
>>>> The file descriptor could remember the path
On 8/31/20 6:05 PM, Chris Angelico wrote:
> On Tue, Sep 1, 2020 at 5:08 AM Richard Damon wrote:
>> The file descriptor could remember the path used to get to it. chroot
>> shows that .. needs to be somewhat special, as it needs to go away for
>> anyone that . is their current
On 8/31/20 12:49 PM, Chris Angelico wrote:
> On Tue, Sep 1, 2020 at 2:40 AM Richard Damon wrote:
>> On 8/31/20 9:00 AM, Chris Angelico wrote:
>>> That's incompatible with the normal meaning of "..", and it also
>>> implies that any time you rename any
; Barry
>
This is based on a hypothetical OS that allows creating hard-links to
directories, just like to files. Because current *nix system don't do it
this way, they don't allow hard-links to directories because it does
cause this sort of issue.
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On 8/31/20 9:00 AM, Chris Angelico wrote:
> On Mon, Aug 31, 2020 at 9:57 PM Richard Damon
> wrote:
>> On 8/31/20 3:35 AM, Chris Angelico wrote:
>>> On Mon, Aug 31, 2020 at 5:28 PM Cameron Simpson wrote:
>>>>> Because of the ".." issue, it'
explicit with the reference of implicit via the current
working directory. That can define what is the parent. Yes, that says
that two references to the 'same' directory (same as in same inode, but
different paths) will find a different value for .. in it. So the
definition of .. can be well defined, even in the presence of multiple
parent directories.
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om:" depending on which mailbox format is being used. There may be
a few other small details that needs to happen to.
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: ordinal not in range(128)
>
> Any message with other than ASCII in it is going to have bytes >128
> unless it's encoded some way to make it 7-bit and that's not going to
> happen in the general case.
>
When I took a quick look at the mailbox class, it said it could take a
'string', or a 'message'. It may well be that the string option assumes
ASCII. You may need to use the message parsing options of message to
convert messages with extended characters into the right format. This is
one of the cases where Python 2's non-strictness made things easier, but
also much easier to get wrong if not careful. Python 3 is basically
making you do more work to make sure you are doing it right.
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I want Python 3's mailbox class to juyst put what I tell it (even if
> mis-formatted or mis-encoded) into the mbox.
>
It looks like the mailbox class has gotten 'pickier' in Python 3, and
won't accept a message as a byte string, just as either a email message
or a real string. My guess would be that 'simplest' path would be to
convert your message into a parsed Message class, and add that.
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On 8/28/20 8:39 AM, Chris Green wrote:
> Richard Damon wrote:
>> On 8/28/20 7:50 AM, Karsten Hilbert wrote:
>>>>> No interpreation requires, since parsing failed. Then you can start
>>>>> dealing with these exceptions. _Do not_ write unparsable messages
x27; does make sure that the program is handling
all the text 'properly', and would be helpful if some of the patterns
being checked for contained 'extended' (non-ASCII) characters.
One possible solution in Python3 is to decode the byte string using an
encoding that allows all 25
;
>> Are we saying that Python 3 really can't be made to handle things
>> 'tolerantly' like Python 2 used to?
> It sure should be possible but it will require *explicit* en/decode()s in
> more places than before because AFAICT there's less impliciteness as to
&
of this, the Python 3 str type is not suitable to store an email
message, since it insists on the string being Unicode encoded, but the
Python 2 str class could hold it.
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sh(y) were random numbers, then how would this property be maintained?
>
> Or do UUID4 mean something else to you than a random number?
Looking up which UUID type 4 is, yes it is a random number, so could
only be applicable for objects that currently return id(), which could
instead make id
Since the typical use of hash will be followed by a real equality test
if the hashes match, we don't need the level of a UUID
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Richard Damon
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ou get the expected value) or
slightly lower (where you would get the top 'excluded' value listed).
This sort of unpredictability is part of the difficulty dealing with
floating point.
As was pointed out, you can scale the range, or build your own generator
to get what you want.
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Richard Damon
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er power, it has no
authority, except might, to enforce it. If we accept might as the right
and power to rule, we need to accept that it was and will be the right
and power, and accept what it brought and will bring.
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Richard Damon
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asking how would it feel to be that 'slave node', maybe even
needing to wait for your 'master' to ask before you went to the
bathroom, or be considered to be 'malfunctioning'.
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Richard Damon
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A few comments come to mind about this discussion about TCO.
First, TCO, Tail Call Optimization, is talking about something that is
an optimization.
Optimizations, are generally some OPTIONAL improvement in the method of
executing the code that doesn't alter its DEFINED meaning.
First big point,
On 8/9/20 6:22 PM, sammy.jackson...@gmail.com wrote:
> On Sunday, August 9, 2020 at 1:32:30 AM UTC+1, Richard Damon wrote:
>> On 8/8/20 8:03 PM, sammy.jackson...@gmail.com wrote:
>>> If i use place holders i.e. {0} and {1} where {0} is the name and {1} is
>>> the dataf
ted differently to get them
into clean html.
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