ed
> by "(*p)->m" (the parens are necessary because of the operator
> precedence).
ITYM (*p).m
> This can be abbreviated to "p->m".
>
> Pascal, on the other hand, dereferences with a postfixed "^", so that
> would be "p^.m"
ord.
Last time I looked a lot of DSP chips still have "byte" sizes larger
than 8 bits. IIRC, 16, 24, and 32 bits are common byte sizes.
Not that Python runs on any of them...
--
Grant Edwards grant.b.edwardsYow! A can of ASPA
_length".
You need to enter the integer such that it's identified by the parser
as an integer rather than as a broken floating point number:
>>> (123).bit_length()
7
>>> 123 .bit_length()
7
--
Grant Edwards grant.b.edwardsYow! Look DEEP into the
On 2016-08-27, Random832 wrote:
> On Sat, Aug 27, 2016, at 13:24, Grant Edwards wrote:
>> Becuase the parser thinks you've entered a floating point number with
>> a fractional part of "bit_length".
>
> 123.+456 doesn't think that the fractional part is &q
; hysterical raisins, pointers can be assigned to integers with just a
> warning. (Good code should have an explicit cast here.)
>
> You probably should have warnings enabled.
IMO, when doing doing development with GCC, -Wall -Werror is the
absolute minimum standard.
--
Gra
generated by a CAD program
for holes in a circuit board is still often referred to as a "drill
tape".
--
Grant Edwards grant.b.edwardsYow! Now that I have my
at "APPLE", I comprehend COST
t, I'm sure there's a lawyer somewhere who's trying to cover his
ass regardless of how foolish it looks...
> This email is confidential and may be subject to privilege. If you
> are not the intended recipient, please do not copy or disclose its
> content but contact th
On 2016-09-08, Random832 wrote:
> On Thu, Sep 8, 2016, at 18:13, Grant Edwards wrote:
>> After all, that boilerplate just makes the corporation look stupid and
>> incompetent. Any email that leaves the corporate network must be
>> assumed to be visible to world+dog
;> ChrisA
>>
>
> That could get someone into troubles.
Well, you need to be a bit diplomatic about it:
"Just FYI, people have told me that they think our boilerplate
disclaimer makes it seem that the company is naive and lacks an
understanding of how the Internet
alogous to PHP's "foreach".
That said, I despise PHP so thoroughly that "because PHP does it" is,
to me, a pretty strong argument for _not_ doing something.
Even trying to ignore my bias agains PHP, I can't see that Python's
calling it "for" instea
oast of Ireland.
>
> I'm told that a few years ago somebody accidentally dumped a trailer load of
> soil by the side of the road in Kanvas, and within a day some enterprising
> entrepreneur had set up a thriving roadside business offering
> mountain-cli
ink that's an absolutely brilliant feature, and I use it a _lot_
when writing C code. I'm a big fan of minimizing the lifetime/scope
of variables. I wish if/then/else did the same thing:
if ((r=some_function()) != R_SUCCESS)
printf("some_function() failed with stat
On 2016-09-30, Grant Edwards wrote:
> On 2016-09-30, Steve D'Aprano wrote:
>
>> To me, "make for-loops be their own scope" sounds like a joke
>> feature out of joke languages like INTERCAL. I'm not aware of any
>> sensible language that does anything
On 2016-10-01, Steve D'Aprano wrote:
> Long story short: I have no working systems capable of compiling the
> latest Python 3.6, and no time to upgrade my usual machines to
> something which will work.
>
> However I do have access to another machine (actually a VM) which can
> compile Python 3.6.
On 2016-10-01, Steve D'Aprano wrote:
> Does gcc support static linking?
Yes, but the real question is the CPython makefile includes recipes
for a statically-linked target.
> Even if I end up with a much bigger binary, at least I know it will
> have everything it needs to run and I won't have to
want to go one step further, you can use the terminfo library
to deal with different terminal types, but I have no idea how to use
it without ncurses. If people care about their programs working with
different terminal types, they use ncurses.
--
Grant Edwards grant.b.edwards
> what terminal type you have (that's black magic itself) and then
> works out what escape sequences you need.
Nothing magic, it just looks at the 'TERM' enviroment varible and
looks up that value in the terminfo database.
--
Grant Edwards grant.b.edwards
e Python syntax rather than trying to force it to be something it
> is not.
[Cue the decades-old story about the elaborate set of C macros that I
once saw somebody using so he could write a C program that looked like
some flavor of structured BASIC.]
--
Grant Edwards grant.b.
On 2016-10-11, Pierre-Alain Dorange wrote:
> For my part, i differenciate a strict compilation (ie. C) from a
> translation into byte-code (ie. Python).
FWIW I've seen C compilers that produced byte-code. They allowed for
a highly interactive developemnt environment.
--
Gr
On 2016-10-13, pozz wrote:
> However, I think the language interpreter could emit the error before
> launching the script even without executing the wrong instruction,
> because it perfectly knows how many arguments the function wants and
> that one instruction calls it with a wrong number of
On 2016-10-16, Michael Okuntsov wrote:
> is there a way, other than time.sleep(), to be sure that the command
> sent through a serial port has been fully executed?
If the remote device doesn't send a response telling you it's done
executing the command, then there is no way to know when that has
On 2016-10-27, Paul Rubin wrote:
> Terry Reedy writes:
>
>> Today, ethernet-connected *nix servers have no keyboard, mouse, or
>> even a directly connected terminal.
>
> Usually you ssh into them and connect to a pty which supports the
> same ioctls that a real terminal would.
On all the Unixes/
On 2016-10-27, Marko Rauhamaa wrote:
> Grant Edwards :
>> I've offered a few times to extend the Linux pty driver to support the
>> same set of ioctl calls that a tty does (so that it could be used in
>> place of a tty generally), but I've never gotten any response
supported by the pty driver, the
video console tty driver, and the real serial-port tty driver, all
provide a common set of API calls.
--
Grant Edwards grant.b.edwardsYow! I wish I was on a
at Cincinnati street corner
x/man-pages/man3/exec.3.html
Note that the arguments are passed as arbitrary length arrays of
character pointers.
> This might just be one of those Unixisms that doesn't apply on all
> platforms.
By using the name of a Unix system call, one might thin
other shell)
or
2) a command line that must be interpreted by bash (or other shell) because it
uses I/O redirection, variable substituion, globbing, etc.
Your code does not use bash (or any other shell), nor does it need to.
It's just running the sudo executable. There are no shells i
on a Linux system, enter this into a terminal to illustrate:
>>
>> sudo grep ^$USER\: /etc/shadow
>
> Bash is not involved here. Python is calling grep directly.
He's already been told this 6 times, and is willfully ignoring it.
Just give up.
--
Gr
On 2016-11-18, eGenix Team: M.-A. Lemburg wrote:
> eGenix PyRun is our open source, one file, no installation version of
> Python, making the distribution of a Python interpreter to run based
> scripts and applications
What's a "based" script?
--
Grant Edwards
print(format_ip(addr))
If is an array of strings containing base-10 representations of
integers, then the str() call isn't needed either:
def format_ip(a):
return '.'.join(s for s in a)
addr = ['12','34','56','78']
print(format_ip(addr))
--
G
m (other than the normal interrupt
enable/disable mechanism) to allow you to lock the CPU for the
duration of those three instructions to ensure that they are atomic.
--
Grant Edwards grant.b.edwardsYow! I request a weekend in
On 2016-12-02, Wildman via Python-list wrote:
> On Fri, 02 Dec 2016 15:11:18 +0000, Grant Edwards wrote:
>
>> I don't know what the "addr" array contains, but if addr is a byte
>> string, then the "int()" call is not needed, in Pythong 3, a byte is
>
On 2016-12-02, Marko Rauhamaa wrote:
> Grant Edwards :
>> In general CISC processors like x86, AMD64, 68K have read-modify-write
>> instructions that allow you to increment a memory location or
>> set/clear a bit in memory with a single instruction:
>>
>>
is kind of communication.
There are a few things in Unix that are fundamentally broken and
really just can't be used for the things they are intended for (serial
ports come to mind).
However, that doesn't seem to prevent them from having been used
sucessfully that way way for 40 years.
the cmd.exe
shell only allow "\" as a path separator.
Back in the day, you could change the DOS option character to "-", and
then type paths they way God intended: with "/" as the separator.
--
Grant Edwards grant.b.edwardsYow! I want another
to flat-screen "thin-clients". I got a chance to play
with one of those, and it was an industrial Single-board-PC and LCD
monitor built into a single unit running Windows. It was configured
to boot up and run a Wyse-50 terminal emulator -- and connect to the
"real" computer v
On 2016-12-08, eryk sun wrote:
> On Thu, Dec 8, 2016 at 4:34 PM, Grant Edwards
> wrote:
>>
>> So, to avoid _that_ problem, Windows command line apps and the cmd.exe
>> shell only allow "\" as a path separator.
>
> In cmd you can usually clarify the in
to check all the
reference values in a large sample of posts from both sources.]
--
Grant Edwards grant.b.edwardsYow! I wonder if I could
at ever get started in the
gmail.comcredit worl
On 2016-12-17, Dennis Lee Bieber wrote:
> On Fri, 16 Dec 2016 15:11:54 + (UTC), Grant Edwards
> declaimed the following:
>
>>I didn't notice much spam on c.l.p (but then again, I filter out all
>>posts from google-groups). The problem on c.l.p that caused me t
On 2016-12-17, D'Arcy Cain wrote:
> On 2016-12-16 08:16 PM, Dennis Lee Bieber wrote:
>> Unfortunately, my client can only "pre filter" on subject and author; I
>> could kill all @gmail.*, but could not focus on just Google Groups
>> submissions...
>
> I don't know what client you use but perh
pylibpcap for ages. It's a bit old, but still works
fine for me:
https://sourceforge.net/projects/pylibpcap/
There's also pypcap:
https://github.com/pynetwork/pypcap
--
Grant Edwards grant.b.edwardsYow! Now KEN and BARBIE
at
On 2016-12-31, Ian Kelly wrote:
> On Dec 31, 2016 3:12 AM, wrote:
>
> That's true.
>
> Please include quoted context in your replies. I have no idea who or what
> you're responding to.
I'd just like to thank everybody for replying to einstein1410's posts
so that those of us who have plonked post
On 2017-01-03, Deborah Swanson wrote:
> I'm sorry, I should have said a GUI console because I wouldn't expect a
> text-based console to produce clickable links.
What's a "GUI console"?
--
Grant Edwards grant.b.edwards
On 2017-01-03, Deborah Swanson wrote:
> Grant Edwards wrote, on January 03, 2017 3:13 PM
>>
>> On 2017-01-03, Deborah Swanson wrote:
>>
>> > I'm sorry, I should have said a GUI console because I
>> wouldn't expect
>> > a text-based c
s 'Firefox [sel]' or 'Chrome [sel]'. It's a
few extra steps, but it works for almostly any application that
displays text.
--
Grant Edwards grant.b.edwardsYow! Where do your SOCKS
at go when you lose
On 2017-01-03, Deborah Swanson wrote:
> I'm sorry, I should have said a GUI console because I wouldn't expect a
> text-based console to produce clickable links.
What's a "GUI console"?
--
Grant Edwards grant.b.edwards
On 2017-01-03, Deborah Swanson wrote:
> Grant Edwards wrote, on January 03, 2017 3:13 PM
>>
>> On 2017-01-03, Deborah Swanson wrote:
>>
>> > I'm sorry, I should have said a GUI console because I
>> wouldn't expect
>> > a text-based console
t says 'Firefox [sel]' or 'Chrome [sel]'. It's a few extra
steps, but it works for almostly any application that displays text.
--
Grant Edwards grant.b.edwardsYow! Where do your SOCKS
at
their original threads.
Something is seriously broken somewhere...
--
Grant Edwards grant.b.edwardsYow! I want a VEGETARIAN
at BURRITO to go ... with
gmail.comEXTRA MSG!!
--
https://mail.pytho
, since it's failing at line 11, and
that's only 5 lines. It helps if we can tell which line generated the
error. ;)
I'm _guessing_ that line 11 is the print(), and it's barfing because
stdout is using ascii encoding, and there's no way to encode that
chara
On 2017-01-18, Smith wrote:
> could you do better?
Yes.
> link code:
> https://repl.it/FMin/8
I would have done better by posting the actual code instead of a blind
link that may point to Dog-knows-what...
--
Grant Edwards grant.b.edwardsYow! I had panca
Given a Unix file discriptor for an open TCP socket, I can't figure
out how to create a python 2.7 socket object like those returned by
socket.socket()
Based on the docs, one might think that socket.fromfd() would do that
(since the docs say that's what it does):
Quoting https://docs.python.org/
On 2017-01-21, Grant Edwards wrote:
> Given a Unix file discriptor for an open TCP socket, I can't figure
> out how to create a python 2.7 socket object like those returned by
> socket.socket()
>
> Based on the docs, one might think that socket.fromfd() would do that
> (si
On 2017-01-21, Chris Angelico wrote:
> On Sun, Jan 22, 2017 at 9:41 AM, Grant Edwards
> wrote:
>> | __init__(self, family=2, type=1, proto=0, _sock=None)
>> |
>>
>> Ah! There's a keyword argument that doesn't appear in the docs, so
>> let'
On 2017-01-21, Christian Heimes wrote:
> You might be interested in my small module
> https://pypi.python.org/pypi/socketfromfd/ . I just releases a new
> version with a fix for Python 2. Thanks for the hint! :)
>
> The module correctly detects address family, socket type and proto from
> a fd. I
Newsgroups: gmane.comp.python.general
From: Grant Edwards
Subject: Re: How to create a socket.socket() object from a socket fd?
References:
Followup-To:
I'm still baffled why the standard library fromfd() code dup()s the
descriptor.
According to the comment in the CPython sources
Is the Python SSL API thread-safe with respect to recv() and send()?
IOW, can I have one thread doing blocking recv() calls on an SSL
connection object while "simultaneously" a second thread is calling
send() on that same connection object?
I assumed that was allowed, but I can't find anything in
On 2017-01-22, Christian Heimes wrote:
> On 2017-01-22 21:18, Grant Edwards wrote:
>> Is the Python SSL API thread-safe with respect to recv() and send()?
>>
>> IOW, can I have one thread doing blocking recv() calls on an SSL
>> connection object while "simultaneo
On 2017-01-23, Antoon Pardon wrote:
> Op 22-01-17 om 01:52 schreef Grant Edwards:
>> Newsgroups: gmane.comp.python.general
>> From: Grant Edwards
>> Subject: Re: How to create a socket.socket() object from a socket fd?
>> References:
>>
>>
>> Fol
nd
up assigned to a PHP project, you end up miserable and unpleasant
to work with or just plain unemployed.
--
Grant Edwards grant.b.edwardsYow! MERYL STREEP is my
at obstetrician!
g
#x27;t use monochrome monitors, etc.
--
Grant Edwards grant.b.edwardsYow! I want the presidency
at so bad I can already taste
gmail.comthe hors d'oeuvres.
--
https://mail.python.org/mailman/listinfo/python-list
On 2017-01-28, Steve D'Aprano wrote:
> Right: I want to know what the terminal window is sized to.
What do you mean by "the terminal"?
Do you mean the device to which the program's output is connected?
Since output is what you have control over, and what's width you might
want to change, that's
On 2017-01-28, Steve D'Aprano wrote:
> On Sat, 28 Jan 2017 10:50 pm, Chris Angelico wrote:
>
>> On Sat, Jan 28, 2017 at 9:49 PM, Steve D'Aprano
>> wrote:
>>> The terminal size doesn't change just because I'm piping output to
>>> another process. Using the terminal size as a proxy for "being piped
mode or with a
> Memorio-BIO https://docs.python.org/3/library/ssl.html#ssl-nonblocking
That section is about how to work with non-blocking sockets. I'm not
using non-blocking sockets.
--
Grant Edwards grant.b.edwardsYow! Now I'm concentrating
On 2017-01-28, Marko Rauhamaa wrote:
> (Although if I were to design an operating system, I don't know if I
> would bother with controlling terminals, job control or chirping
> modems.)
I've been using serial ports on Unix for 35 years, and maintaining
serial drivers for Linux for almost 20. Man
On 2017-01-29, Marko Rauhamaa wrote:
> Grant Edwards :
>
>> On 2017-01-28, Marko Rauhamaa wrote:
>>
>>> (Although if I were to design an operating system, I don't know if I
>>> would bother with controlling terminals, job control or chirping
>>&
On 2017-01-29, Marko Rauhamaa wrote:
> Chris Angelico :
>
>> On Mon, Jan 30, 2017 at 3:28 AM, Marko Rauhamaa wrote:
>>> Grant Edwards :
>>>
>>>> On 2017-01-29, Marko Rauhamaa wrote:
>>>>> I *have* been longing for a serial console in linu
On 2017-01-29, Marko Rauhamaa wrote:
> Mount? As a regular user?
Yes, using a "fuse" use-space filesystem, you can mount things as a
normal user. There are a couple ISO9660 fuse implemenations. But, you
can't modify a mounted ISO9660 filesystem. I have read about how to
use a union mount to si
On 2017-01-29, Grant Edwards wrote:
> On 2017-01-29, Marko Rauhamaa wrote:
>
>> Mount? As a regular user?
>
> Yes, using a "fuse" use-space filesystem, you can mount things as a
> normal user. There are a couple ISO9660 fuse implemenations. But, you
> can
depends on your particular
OS/libc/filesystem implementation. It's not determined by nor
knowable by the authors of the os module.
--
Grant Edwards grant.b.edwardsYow! I'm ANN LANDERS!!
at I can SHOPLIFT!!
ot what beginners are trying to do.]
I always found the first sentence to be a bit funny:
This module provides a portable way of using operating system
dependent functionality.
I understand whay they're tying to say, but I always found it amusing
to say you're going to pr
--
The next time you are in the /tmp directory looking for something, can
you guess what happens when you mistype "ls" as "sl"?
> DOS and Windows has searched the current directory since their
> beginning. Is that also dangerous?
Yes.
-
f have been compromised in this manor?
I've known a few people over the years who've been caught by that
trick. The "evil" program was always more of a joke and did no real
harm.
--
Grant Edwards grant.b.edwardsYow! JAPAN is a WONDERFUL
On 2018-03-20, Alister via Python-list wrote:
> but why would a functional programmer be programming an OOP class?
Part of a 12-step recovery plan?
;)
--
Grant Edwards grant.b.edwardsYow! Hello. I know
at the divo
manual transmissions are much more likely to be RWD than are
automatics.
--
Grant Edwards grant.b.edwardsYow! Inside, I'm already
at SOBBING!
gmail.com
--
https://mail.python.org/mailman/list
On 2018-03-20, Tom Evans via Python-list wrote:
> On Tue, Mar 20, 2018 at 5:25 PM, Grant Edwards
> wrote:
>> On 2018-03-20, Neil Cerutti wrote:
>>
>>> My automotive course will probaly divide cars into Automatic
>>> Transmission, and Front Wheel Dr
without orders from
his boss, who won't order changes without because there's no budget
for that.
OK, perhaps it's not a _good_ reason by your metrics, but reasons like
that are what you find in the real world.
--
Grant Edwards grant.b.edwardsYow! ... My pants j
either justify X or just ingore the subthreads about Y
and Z. Except sometimes the answer _is_ that you really don't want to
do X, and probably should do Y or Z.
--
Grant Edwards grant.b.edwardsYow! Oh my GOD -- the
at SUN just f
On 2018-03-25, bartc wrote:
> On 25/03/2018 02:47, Steven D'Aprano wrote:
>
>> The Original Poster (OP) is concerned about saving, what, a tenth of a
>> microsecond in total? Hardly seems worth the effort, especially if you're
>> going to end up with something even slower.
>
> Using CPython on my
On 2018-03-27, kevon harris wrote:
> Unable to pull up IDLE after downloading Python 3.6.4
Ah. What happens when you push down instead of pull up?
> Sent from Mail for Windows 10
Sent from mutt for Gentoo Linux
--
https://mail.python.org/mailman/listinfo/python-list
On 2018-03-31, Etienne Robillard wrote:
> Are you trolling? Do you understand that a modern mobile device
> typically require a Internet subscription and an additional subscription
> for the smart phone?
Huh? What is "an internet subscription"?
Why would you need two of them if all you have
k.org/Development/LibpcapFileFormat
You should be able to use ctypes to directly access the winpcap
library if you want to:
https://www.winpcap.org/
--
Grant Edwards grant.b.edwardsYow! ! Up ahead! It's a
at DONUT H
he CPUs
shared SDRAM and used the same physical address space. They both saw
the same PCI/ISA buses and all other peripherals. There was no way you
could run two different OSes without some sort of hypervisor -- there
was no practical difference between them and a modern multi-core CPU.
--
ow, that's ugly -- I don't think I'd be able to tell you what it
actually does without actually running it.
If speed is that important, I might just write a function in C and
call it with ctypes. :)
--
Grant Edwards grant.b.edwardsYow! HAIR TONICS, please!!
at
gmail.com
--
https://mail.python.org/mailman/listinfo/python-list
.find(bytes(sys.argv[2],encoding='UTF-8'))
print(i)
The above code works for me, but I don't know how perfomance compares
with other methods. I think the mmap() signature is slightly
different on Windows.
--
Grant Edwards grant.b.edwards
is actually 420 base 10
Aaargh. That's awful.
I didn't think it was possible for my opinion of PHP to get any lower.
I was wrong.
--
Grant Edwards grant.b.edwardsYow! I wonder if I could
at
when the
size of the object being read is 8 bits.
--
Grant Edwards grant.b.edwardsYow! An INK-LING? Sure --
at TAKE one!! Did you BUY any
gmail.comCOMMUNIST UNIFORMS??
--
https:/
gt; than 63 hex
The first 8080-compatible "computer" I owned was a Heathkit terminal
with an 8085 CPU. The firmware listings used "split octal":
0x = 000 000
0x = 377 377
IIRC, PDP-11 assembly listings and machine documentation generally
used octal for the same rea
uters didn't run Windows.
Of course not, everything ran Linux back in the good old days.
--
Grant Edwards grant.b.edwardsYow! PIZZA!!
at
gmail.com
--
https://mail.python.org/mailman/listinfo/python-list
On 2018-05-15, mahesh d wrote:
> import glob
_Please_ stop creating new threads for this question. I think this is
the fifth thread you've started for what appears to be a single
question.
--
Grant Edwards grant.b.edwardsYow! Like I al
ne and a half decades.
>
> That would still be plural decades.
So would zero. ;)
The only plural in English implies is that the quantity is not 1. It
does _not_ imply the quantity is greater than 1.
--
Grant Edwards grant.b.edwardsYow! ! Now I understand
400, Abdur-Rahmaan Janhangeer wrote:
>>
And one such popular issue is how top-posting is evil.
--
Grant Edwards grant.b.edwardsYow! Catsup and Mustard all
at over the place! It's the
On 2018-05-17, kret...@gmail.com wrote:
> https://stackoverflow.com/questions/50383210/python-requests-how-to-post-few-stages-forms
Your point?
--
Grant Edwards grant.b.edwardsYow! I had pancake makeup
at for bru
asked or give you enough instructions to actually get the job done that
> they want you to do.
And most people seem to believe that if they read more that the first
two sentences of any e-mail it might trigger the apocolypse or give
their cat scabies or something else dreadful.
--
Gra
ne, so threading works somewhat
better.
[Regardless of whether I'm using Usenet or Gmane, I have slrn
configured to plonk all posts made from google.groups.]
--
Grant Edwards grant.b.edwardsYow! My nose feels like a
trying out the regex in a
> Python console?
Doesn't everybody have an executable file in their home directory
named "testit.py" which is continually morphed to test different
Python features?
--
Grant Edwards grant.b.edwardsYow! What's the MATTER
On 2018-05-22, Peter J. Holzer wrote:
> On 2018-05-21 15:42:28 +0000, Grant Edwards wrote:
>> I switched from Usenet to Gmane mainly because references headers are
>> bit more consistent on Gmane, so threading works somewhat better.
>
> This is interesting, because Gmane was
s or Posix queues or whatnot?
Can Python multiprocessing be used in this way?
--
Grant Edwards grant.b.edwardsYow! If our behavior is
at strict, we do not need fun!
gmail.com
--
htt
but it's pretty difficult to glean the the
signal from the noise created by people with broken MUAs and/or NNTP
clients.
It's actually pretty impressive it all works as well as it does...
In any case, ignoring all postings from Google Groups is recommended.
--
Grant Edwards
et gmane do that).
--
Grant Edwards grant.b.edwardsYow! I have many CHARTS
at and DIAGRAMS..
gmail.com
--
https://mail.python.org/mailman/listinfo/python-list
atures to try to make it work for shared discussions. As a result,
mailing lists mostly work (especially for low-volume "groups") and are
pretty decent compared to "web forums" and other such wastes of
electrons.
But IMO email pales in comparison to NNTP when there are more
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