On 2021-11-22, ast wrote:
> Hi,
>
> >>> a = 6
> >>> b = 6
> >>> a is b
> True
>
> ok, we all know that Python creates a sole instance
> with small integers, but:
>
> >>> import copy
> >>> b = copy.copy(a)
> &
encies
>without modifying anything on the host system.
Thanks for the feedback. You are right.
I agree that virtualenv is the most safest method at this time.
Regards,
Mahmood
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something else entirely.
-Original Message-
From: Python-list On
Behalf Of Ulli Horlacher
Sent: Thursday, November 25, 2021 12:10 PM
To: [email protected]
Subject: Re: pyinstaller wrong classified as Windows virus
Chris Angelico wrote:
> Unfortunately, if you're not going
y other techniques anyone can suggest, or is the only
alternative to use if...then...else to cater for y = 0?
Thanks
Frank Millman
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Have you tried using Nuitka - rather than pyInstalller - it means you
distribute a single executable and the Python run time library (which
they probably have already), and it has the advantage that it is a bit
quicker than standard python.
Rather than bundle the source code and interpreter
I have a C program that forks to create a child process and uses execv to call
a Python program. The Python program communicates with the parent process (in
C) through a FIFO pipe monitored with epoll().
The Python child process is in a while True loop, which is intended to keep it
running
Thanks to you and Cameron for your replies. The C side has an epoll_ctl set,
but no event loop to handle it yet. I'm putting that in now with a pipe write
in Python-- as Cameron pointed out that is the likely source of blocking on C.
The pipes are opened as rdwr in Python because t
Thanks for your comment re blocking.
I removed pipes from the Python and C programs to see if it blocks without
them, and it does. It looks now like the problem is not pipes. I use fork()
and execv() in C to run Python in a child process, but the Python process
blocks because fork() does
print("Found!")
break
elif name.isupper():
print("All-caps name that wasn't found")
This actually doesn't work. I have been programming in Python for well
over a decade, and never before been in a situation where this would
be useful.
As YAGNIs go, this is right u
A new library called pagesign (Python-age-sign) has been released on PyPI [1].
It covers similar functionality to python-gnupg, but uses the modern encryption
tool
age [2] and the modern signing tool minisign [3]. The initial release allows
you to:
* Create and manage identities (which are
Thanks for your comments.
I put the Python program on its own pthread, and call a small C program to
fork-execv to call the Python program as a child process. I revised the Python
program to be a multiprocessing loop using the Python multiprocessing module.
That bypasses the GIL and allows
By embedding, I think you may be referring to embedding Python in a C program
with the Python C API. That's not what I'm doing here -- I'm not using the
Python C API. The C program creates two threads (using pthreads), one for
itself and one for the child process. On creat
Hello,
I have already posted a message some time ago for this app. Since then, I
didn't code in python or made any changes. I think before getting further with
functionnalities a few things or the whole thing need to be changed.
For exemple, it would need a button to pick folders and mayb
t;).
You may be confused by the fact that threads are called light-weight processes.
Or maybe I'm confused :)
If you have other information, please let me know. Thanks.
Jen
Dec 5, 2021, 18:08 by [email protected]:
> On 2021-12-06 00:51:13 +0100, Jen Kris via Python-list wrote:
>
@barrys-emacs.org:
>
>
>> On 6 Dec 2021, at 17:09, Jen Kris via Python-list
>> wrote:
>>
>> I can't find any support for your comment that "Fork creates a new
>> process and therefore also a new thread." From the Linux man pages
>> htt
Hello
ti 7. jouluk. 2021 klo 19.47 vani arul ([email protected]) kirjoitti:
> Hey There,
> Can someone help to understand how a python function can return value with
> using return in the code?
> It is not not about explicit or implicit function call.
>
>
Not sure whether
ions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags
>
> > Can xpath / lxml do that?
> >
> > What are the chief differences between xpath / lxml and Beautiful Soup?
> >
>
> I've never directly used lxml, mainly because bs4 offers all the same
> ad
nyone has a better solution I would
appreciate any feedback.
To recap, I'm using a pair of named pipes for IPC between C and Python. Python
runs as a child process after fork-execv. The Python program continues to run
concurrently in a while True loop, and responds to requests from C at
gs in get_distributions() if bad metadata seen, but
keep
going.
* Fixed #154: Determine Python versions correctly for Python >= 3.10.
* Updated launcher executables with changes to handle duplication logic.
Code relating to support for Python 2.6 was also removed (support for Python
2.6 was
dropped in an
this very wrongly. Python
has plenty of open source libraries you can use that will parse the
HTML reliably into tags and text for you.
> 2. Neither is the segmentation perfect. I am currently researching
> developing an optimal segmenter with tools from Spacy.
>
> Brevity is greatly v
key==a[med]:
return med
elif key>a[med]:
l=med+1/
/ elif keyBut in the following block,how does it return values if there is no
return specified?
First of all please reply always to the list address!
If Python does not encounter a return statement i
58944] AH00489: Apache/2.4.41 (Ubuntu) SVN/1.13.0
OpenSSL/1.1.1f mod_wsgi/4.6.8 Python/3.8 configured -- resuming normal
operations
[Mon Dec 13 01:15:49.885664 2021] [core:notice] [pid 1033:tid
140446449658944] AH00094: Command line: '/usr/sbin/apache2'
Exception ignored in:
Traceba
On 13/12/2021 12:42 pm, Chris Angelico wrote:
On Mon, Dec 13, 2021 at 12:31 PM Mike Dewhirst via Python-list
wrote:
Obviously something is wrong elsewhere but I'm not sure where to look.
Ubuntu 20.04 with plenty of RAM.
def __del__(self):
try:
for context_o
selector', 'signals', 'spiders', 'twisted_version',
> 'utils', 'version_info']
>
> I wish there was a convenient way for me to know what all of these are.
['%s: %s' % (x, type(getattr(scrapy, x))) for x in dir(scrapy)]
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s and describe
it.Fyi, there was nothing out of kilter in the machine. It was in production
and is stable.CheersMike--(Unsigned mail from my phone)
Original message From: "Peter J. Holzer"
Date: 26/12/21 06:19 (GMT+10:00) To: [email protected] Subject: Re:
checking it. But
corruption can happen for many reasons including at the level of the disk it
is written to.
-Original Message-
From: Python-list On
Behalf Of iMath
Sent: Wednesday, December 29, 2021 10:51 AM
To: [email protected]
Subject: Re: recover pickled data: pickle data was
right one or ...
Many machines simply restrict you to compare numbers only up to the point
where an int or float of some kind support it and then the operation of
comparison is mostly just done in a few steps in the hardware no matter what
size the two things are. Python with support for unlimited size
You can design tree structures in ways that allow them
to be traversed in an iterative way such as having bi-directional links
along with flags that mark where you entered a node from or already visited.
Tools should be tools, not religions.
-Original Message-----
From: Python-list On
Be
This entire thread seems a bit IFFY to me.
It does seme like HW to me but also a bit peripheral.
The fact that the data is in EXCEL is a detail. And unless a spreadheet is
complex, it may be trivial to save the file as a .CSV and from then on read
from there into Python (or anything) and when
there any way to use built-in function for a more efficient code?
Regards,
Mahmood
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: "what it the item in row/address 2 of the column
that somewhere contains two additional specified contents called key1 and key2"
My guess is that if the instructor wanted this to be solved using methods being
taught, then loops may well be a way to go. Python and numpy/pandas make it
often
start
with, that may be lots of extra work.
And it is not python alone what might require work but other languages like R
too.
Perhaps I missed a better description of the design.
-Original Message-
From: Dennis Lee Bieber
To: [email protected]
Sent: Sun, Jan 9, 2022 1:08 pm
Subject
I am not replying to anything below so I have removed it.
So I need to remind people of the topic and how it has wandered.
Someone has data in a not particularly great format in an EXCEL spreadsheet.
They want to somehow use an external language like Python to manipulate the
contents from
On 2022-01-15, Bob Griffin wrote:
>I am running this program and keep getting this error. Is this normal?
>
>Invalid syntax. Perhaps you forgot a comma?
>
>Also the t in tags is highlighted.
>
>I even tried different versions of Python also.
>
>
x27;,' and this causes the final
CSV file to have more than 2 columns, while I want to write the whole key as a
single column.
I know that wr.writerow([key]) writes the entire key in one column, but I would
like to do the same with write(). Any idea to fix that?
Regards,
Mahmood
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Mats,
Yes, this is a Python mailing list and I welcome people interested in doing
something in Python who need a little help or advice but have some idea of what
they are doing and present us with enough info more than "something does not
work."
Yes, the topic was raised on a Python
Right. I was also able to put all columns in a string and then use writerow().
Thanks.
Regards,
Mahmood
On Saturday, January 15, 2022, 10:33:08 PM GMT+1, alister via Python-list
wrote:
On Sat, 15 Jan 2022 20:56:22 + (UTC), Mahmood Naderan wrote:
> Hi,
> I use the fol
symbols to delimit data and may be saved with
names like a .TSV file or others. Python can trivially read in such files often
simply by telling it to read something like a CSV but specifying the field
separator is a tab or some other character.
But I have another dumb question. Why are you writing your
ways perhaps never
intended. Obviously, feeling urgency to do something quickly will make it hard
to accept our suggestions, but nonetheless, a request here, as has been pointed
out, should anticipate a python-oriented answer. Asking us here to make a set
of macros for EXCEL to do this task would
Good day,
I am experiencing issues trying to download Python. I would please need some
assistance to help download the progam to my laptop.
Kind regards
Renda
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I do not manage any python lists or have any say in how they run so I have no
idea why I am being asked by name below, as Dennis pointed out.
So I won't reply on whatever I am being asked, but want to point out that many
forums may be asked questions and some people on the forum will not re
I am
attaching a 2nd nodes to each other, and the live code therefore
increments the ref-count for both objects - so even if the Python code
deletes it's reference the reference count for the instance should still
be 1 in order to ensure it doesn't get garbage collected./
This fu
On 19/01/2022 11:09, Chris Angelico wrote:
On Wed, Jan 19, 2022 at 10:00 PM Tony Flury via Python-list
wrote:
Extension function :
static PyObject *_Node_test_ref_count(PyObject *self)
{
printf("\nIncrementing ref count for self - just for the hell
of
lib.linux-x86_64-3.10/
spam.cpython-310-x86_64-linux-gnu.so)
[and more of the same]
It seems that I need to install some library to make this work, but which one?
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I keep wondering about the questions asked by NArshad here. His message can be
read below mine, for context.
This is a place focused on using the Python language. The web page being in
HTML is beyond irrelevant and in particular, web pages generally are in HTML
even if only as a way to call
Dan Stromberg wrote:
> Perhaps try:
> https://stromberg.dnsalias.org/svn/find-sym/trunk
>
> It tries to find symbols in C libraries.
>
> In this case, I believe you'll find it in -lpythonx.ym
Thanks! Found out that ldd produces many errors also with working python
librarie
to select some subset
of rows will use things like a data structure holding the integer indexes you
want or a boolean where True means take it and False means ignore it.
Many real life applications just incorporate both numpy as np and pandas as pd
and sometimes also use other Python
h, I wasn't clear there. It was equivalent to *the Python code*
"return self". My apologies.
> The normal thing to do is to add a reference to whatever you're
> returning. For instance, Py_RETURN_NONE will incref None and then
> return it.
>
The OP understa
On 25/01/2022 22:28, Barry wrote:
On 25 Jan 2022, at 14:50, Tony Flury via Python-list
wrote:
On 20/01/2022 23:12, Chris Angelico wrote:
On Fri, 21 Jan 2022 at 10:10, Greg Ewing wrote:
On 20/01/22 12:09 am, Chris Angelico wrote:
At this point, the refcount has indeed been increased
On 26/01/2022 01:29, MRAB wrote:
On 2022-01-25 23:50, Tony Flury via Python-list wrote:
On 25/01/2022 22:28, Barry wrote:
On 25 Jan 2022, at 14:50, Tony Flury via
Python-list wrote:
On 20/01/2022 23:12, Chris Angelico wrote:
On Fri, 21 Jan 2022 at 10:10, Greg
Ewing wrote:
On 20/01
On 26/01/2022 08:20, Chris Angelico wrote:
On Wed, 26 Jan 2022 at 19:04, Tony Flury via Python-list
wrote:
So according to that I should increment twice if and only if the calling
code is using the result - which you can't tell in the C code - which is
very odd behaviour.
No, the r
On 26/01/2022 22:41, Barry wrote:
Run python and your code under a debugger and check the ref count of
the object as you step through the code.
Don’t just step through your code but also step through the C python code.
That will allow you to see how this works at a low level.
Setting a
On 03/01/2022 12:45, Joao Marques wrote:
Good morning: I have a very simple question: I want to start writing
programs in Python so I went to the Microsoft Store and installed
Python3.9. No problem so far. I would prefer to have a gui interface, an
interface that I can use file-->Open and F
I am using multiprocesssing.shared_memory to pass data between NASM and Python.
The shared memory is created in NASM before Python is called. Python connects
to the shm: shm_00 =
shared_memory.SharedMemory(name='shm_object_00',create=False).
I have used shared memory at other
Barry, thanks for your reply.
On the theory that it is not yet possible to pass data from a non-Python
language to Python with multiprocessing.shared_memory, I bypassed the problem
by attaching 4 bytes to my FIFO pipe message from NASM to Python:
byte_val = v[10:14]
where v is the message
m: Dennis Lee Bieber
To: [email protected]
Sent: Wed, Feb 2, 2022 12:30 am
Subject: Re: Data unchanged when passing data to Python in multiprocessing
shared memory
On Wed, 2 Feb 2022 00:40:22 +0100 (CET), Jen Kris
declaimed the following:
>
> breakup = int.from_bytes(byte_va
Feb 1, 2022, 21:30 by [email protected]:
> On Wed, 2 Feb 2022 00:40:22 +0100 (CET), Jen Kris
> declaimed the following:
>
>>
>> breakup = int.from_bytes(byte_val, "big")
>>
> >print("this is breakup " + str(breakup))
>
>>
>>
>
An ASCII string will not work. If you convert 32894 to an ascii string you
will have five bytes, but you need four. In my original post I showed the C
program I used to convert any 32-bit number to 4 bytes.
Feb 2, 2022, 10:16 by [email protected]:
> I applaud trying to find the ri
ning = False
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Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
--
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cessary, but if you want a good Pythonic way to show
> the beginning and end of its use area, a 'with' block is the way to
> go.)
I will look into that.
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Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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s_running = True
self._next()
def stop(self):
if self._is_running:
self._timer.cancel()
self._timer = None
self._is_running = False
--
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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aside and the string use
a null terminator if shorter.
Of course if this big-endian issue also scrambles bytes used in strings, forget
it.
Or, maybe shared memory is not the easy way to go, even it it might be faster.
-Original Message-
From: Jen Kris
To: Avi Gross
Cc: python-list
nce(interval, (int,float)):
>
> which handles subclasses of these types (but note that bool subclasses
> int :-)
Done, thanks.
--
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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e
> default; you don't need to say "class X(object)"), which will
> automatically give your object all the methods of a timer.
Of-course. I should have thought about that. :'-(
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Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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ng?
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Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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> self._next()
> self._is_running = True
>
> def stop(self):
> if self._is_running:
> self._timer.cancel()
> self._timer = None
> self._is_running = False
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Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Chris Angelico writes:
> On Thu, 3 Feb 2022 at 15:43, Cecil Westerhof via Python-list
> wrote:
>>
>> Chris Angelico writes:
>>
>> >> > (Side point: The OP's code is quite inefficient, as it creates a new
>> >> > thread for each reitera
Barry writes:
>> On 3 Feb 2022, at 04:45, Cecil Westerhof via Python-list
>> wrote:
>>
>> Have to be careful that timing keeps correct when target takes a 'lot'
>> of time.
>> Something to ponder about, but can wait.
>
> You have noticed
name …
The class starts a thread where every by the user defined interval a
by the user define function is called.
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Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Ethan Furman writes:
> On 2/4/22 6:28 AM, Cecil Westerhof via Python-list wrote:
>
>> It was already not a good name, but I am rewriting the class
>> completely, so now the name is a complete bumper. (No more timer.) I
>> am thinking about naming the class repeating_
Igor Berger writes:
> On Friday, February 4, 2022 at 12:28:53 PM UTC-5, Cecil Westerhof wrote:
>> Ethan Furman writes:
>>
>> > On 2/4/22 6:28 AM, Cecil Westerhof via Python-list wrote:
>> >
>> >> It was already not a good name, but I am rewriting
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Chris Angelico writes:
> On Sat, 5 Feb 2022 at 04:33, Cecil Westerhof via Python-list
> wrote:
>>
>> Ethan Furman writes:
>>
>> > On 2/4/22 6:28 AM, Cecil Westerhof via Python-list wrote:
>> >
>> >> It was already not a good name, but I am
time_after_time
But to be more pythonic, throw some double underscores before and after.
-Original Message-
From: Igor Berger
To: [email protected]
Sent: Fri, Feb 4, 2022 12:40 pm
Subject: Re: Waht do you think about my repeated_timer class
On Friday, February 4, 2022 at 12:28:53
Chris Angelico writes:
> On Tue, 8 Feb 2022 at 02:53, Grant Edwards wrote:
>>
>> On 2022-02-06, Dennis Lee Bieber wrote:
>> > On Sun, 6 Feb 2022 13:44:07 +0530, "[email protected]"
>> > declaimed the following:
>> >
>> >
t his little
experiment showed.
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Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Chris Angelico writes:
> On Tue, 8 Feb 2022 at 06:51, Cecil Westerhof via Python-list
> wrote:
>>
>> Chris Angelico writes:
>>
>> >> > How difficult would it be to get people to read those lines, though?
>> >>
>> >> That d
I am using the Python C API to load the Gutenberg corpus from the nltk library
and iterate through the sentences. The Python code I am trying to replicate is:
from nltk.corpus import gutenberg
for i, fileid in enumerate(gutenberg.fileids()):
sentences = gutenberg.sents(fileid
Is there any way to get this mesage to stop showing up in my mailbox in what
seems to be a shotgun approach asking everybody everywhere they can think of to
participate in something very amorphous and at the same time having NOTHING
particular to do with Python?
I consider things like this SPAM
Thank you for clarifying that. Now on to getting the iterator from the method.
Jen
Feb 8, 2022, 18:10 by [email protected]:
> On 2022-02-09 01:12, Jen Kris via Python-list wrote:
>
>> I am using the Python C API to load the Gutenberg corpus from the nltk
>> l
This is a follow-on to a question I asked yesterday, which was answered by
MRAB. I'm using the Python C API to load the Gutenberg corpus from the nltk
library and iterate through the sentences. The Python code I am trying to
replicate is:
from nltk.corpus import gutenberg
for i, file
/vrut/python/ext/buildValue.html, PyBuildValue
"builds a tuple only if its format string contains two or more format units"
and that doc contains examples.
Feb 9, 2022, 16:52 by [email protected]:
> On Thu, Feb 10, 2022 at 9:42 AM Jen Kris via Python-list
> wrote:
>
he one to use. According
>> to http://web.mit.edu/people/amliu/vrut/python/ext/buildValue.html,
>> PyBuildValue "builds a tuple only if its format string contains two or more
>> format units" and that doc contains examples.
>>
>
> Yes, and PyObject
I'm using Python 3.8 so I tried your second choice:
pSents = PyObject_CallFunctionObjArgs(pSentMod, pListItem);
but pSents is 0x0. pSentMod and pListItem are valid pointers.
Feb 9, 2022, 17:23 by [email protected]:
> // https://docs.python.org/3/c-api/call.html#c.PyObject_Ca
using a cryptographic method
might be better.
-Original Message-
From: Abdur-Rahmaan Janhangeer
To: Python
Sent: Wed, Feb 9, 2022 12:24 pm
Subject: Re: Best way to check if there is internet?
> This won't work if you're behind a captive portal: every URL you
try to get will ret
I'll do that and post back tomorrow. The office is closing and I have to leave
now (I'm in Seattle). Thanks again for your help.
Feb 9, 2022, 17:40 by [email protected]:
> On Thu, Feb 10, 2022 at 10:37 AM Jen Kris wrote:
>
>>
>> I'm using Python
things.
But of course, performance is not the only consideration, as per Chris
Angelico's answer.
Best wishes
Rob Cliffe
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om PyErr_Print. I'm not far enough along in my C_API work to
understand why, but it doesn't work.
Thanks very much for your help on this.
Jen
Feb 9, 2022, 17:40 by [email protected]:
> On Thu, Feb 10, 2022 at 10:37 AM Jen Kris wrote:
>
>>
>> I
erday.
Thanks much for your help.
Jen
Feb 9, 2022, 18:43 by [email protected]:
> On 2022-02-10 01:37, Jen Kris via Python-list wrote:
>
>> I'm using Python 3.8 so I tried your second choice:
>>
>> pSents = PyObject_CallFunctionObjArgs(pSentMod, pListItem);
>
Thank you for that suggestion. It allowed me to replace six lines of code with
one. :)
Feb 10, 2022, 12:43 by [email protected]:
> On 2022-02-10 20:00, Jen Kris via Python-list wrote:
>
>> With the help of PyErr_Print() I have it solved. Here is the final code
which
circumstances.
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: NArshad
To: [email protected]
Sent: Thu, Feb 10, 2022 1:40 am
Subject: How to solve the given problem?
Assume that there is a pattern of feeding for a special fish in a day (10 hours
a day) as below:
150 100 30 30 30 20 20 10
5 5
I created a dictionary with the Python C API and assigned two keys and values:
PyObject* this_dict = PyDict_New();
const char *key = "key1";
char *val = "data_01";
PyObject* val_p = PyUnicode_FromString(val);
int r = PyDict_SetItemString(this_dict, key, val_p);
// Add
Yes, that works. This is my first day with C API dictionaries. Now that
you've explained it, it makes perfect sense. Thanks much.
Jen
Feb 14, 2022, 17:24 by [email protected]:
> On Tue, 15 Feb 2022 at 12:07, Jen Kris via Python-list
> wrote:
>
>>
>> I created a
line at a time in Python and parse it by comma
and any other processing and act on one row at a time or in small batches so
you never need huge amounts of memory. But using other methods to read in the
entire set of data is often better optimized and faster, and being able to do
some things
od is odd and leaves it
entirely out of the tables that keep track, you then would have a memory leak.
-Original Message-
From: Abdur-Rahmaan Janhangeer
To: Chris Angelico
Cc: Python
Sent: Sun, Feb 20, 2022 12:27 pm
Subject: Re: Why does not Python accept functions with no names?
Thanks f
Wichmann
Cc: [email protected]
Sent: Sun, Feb 20, 2022 1:05 pm
Subject: Re: Long running process - how to speed up?
On Sat, 19 Feb 2022 at 19:44, Mats Wichmann wrote:
> On 2/19/22 05:09, Shaozhong SHI wrote:
> > Can it be divided into several processes?
> > Regards,
> > Da
something you can create as
say elements of a list so you have a list of functions you can access as in
f[0] but in a sense that has a name as it can be accessed as a component of the
data structure called f. I am not sure if python would trivially let you
create that. But the point is if you want to
could be caught would be
accepted, even if teh resulting code was nonsense.
Some languages use a real placeholder such as "_" (single underscore) to
represent an I DON'T CARE scenario meaning I do not want to provide a name and
Python allows code like:
(a, _, c, _, e) = (1, 2, 3
7;, 'ccc'], ['fff', 'ggg']]
As shown the list comprehension itself is not returning anything of value and
need not be assigned to anything. But it then generally is set to autoprint and
that can be supressed by assigning the value to _ or anything you can ignore.
I
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