be short circuited.
Me neither, but that could be related to the meaning of n (which I did
not get) in the OP's question. Maybe he can clarify.
Best regards
Axel
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On Tue, 14 Nov 2023 at 08:57, Axel Reichert via Python-list
wrote:
>
> Barry writes:
>
> > I do not understand how xor(iterator) works.
> > I thought xor takes exactly 2 args.
>
> See
>
> https://mathworld.wolfram.com/XOR.html
>
> for some background (I w
: xor_new(test2), # 0.0074
lambda: all(test1), # 0.0016
lambda: all(test2) # 0.0046
])
Your first function is fairly slow.
Second one deals with short-circuiting, but is super slow on full search.
`xor_new` is the best what I could achieve using python builtins.
But builtin `all` has
On 2023-11-13, Dom Grigonis via Python-list wrote:
> Hi All,
>
> I think it could be useful to have `xor` builtin, which has API similar to
> the one of `any` and `all`.
>
> * Also, it could have optional second argument `n=1`, which
> * indicates how many positives indicate
applied to many bits.
This is more in line with cases that `any` and `all` builtins are used.
> On 14 Nov 2023, at 00:51, Grant Edwards via Python-list
> wrote:
>
> On 2023-11-13, Dom Grigonis via Python-list wrote:
>> Hi All,
>>
>> I think it could be useful to
On Tue, 14 Nov 2023 at 10:00, Dom Grigonis via Python-list
wrote:
>
> I am not asking. Just inquiring if the function that I described could be
> useful for more people.
>
> Which is: a function with API that of `all` and `any` and returns `True` if
> specified number o
some time
to even convey what I mean. Bad naming didn’t help ofc, but if it was something
that is needed I think it would have clicked much faster.
Thanks,
DG
> On 14 Nov 2023, at 01:12, Chris Angelico via Python-list
> wrote:
>
> On Tue, 14 Nov 2023 at 10:00, Dom Grigonis via
On 2023-11-13, Dom Grigonis via Python-list wrote:
> I am not asking. Just inquiring if the function that I described
> could be useful for more people.
>
> Which is: a function with API that of `all` and `any` and returns
> `True` if specified number of elements is True.
I'
n Number of True values.
Fair point.
Have you ever encountered the need for xor for many bits (the one that I am NOT
referring to)? Would be interested in what sort of case it could be useful.
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On 11/13/23 16:24, Dom Grigonis via Python-list wrote:
I am not arguing that it is a generalised xor.
I don’t want anything, I am just gauging if it is specialised or if there is a
need for it. So just thought could suggest it as I have encountered such need
several times already.
It is
>AFAICT, it's not nothing at all to do with 'xor' in any sense.
As much as I agree that the function needn't be in the base of python, I
can easily follow the OP's logic on the function name.
With two items in the iterator, it is a standard binary exclusive or.
It is
On Tue, 14 Nov 2023 at 11:29, Dom Grigonis via Python-list
wrote:
>
>
> > Except the 'any' and 'all' builtins are _exactly_ the same as bitwise
> > or and and applided to many bits. To do something "in line" with that
> > using the
thing.
DG
> On 14 Nov 2023, at 02:33, Mats Wichmann via Python-list
> wrote:
>
> On 11/13/23 16:24, Dom Grigonis via Python-list wrote:
>> I am not arguing that it is a generalised xor.
>> I don’t want anything, I am just gauging if it is specialised or if there is
>
On Tue, 14 Nov 2023 at 12:02, Dom Grigonis via Python-list
wrote:
> As I am here, I will dare to ask if there is no way that `sign` function is
> going to be added to `math` or `builtins`.
>
https://docs.python.org/3/library/math.html#math.copysign
ChrisA
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On 14/11/2023 00:33, Mats Wichmann via Python-list wrote:
> Hardware and software people may have somewhat different views of xor
I've come at it from both sides. I started life as a telecomms
technician and we learned about xor in the context of switching
and relays and xor was
eo is well worth watching. More modern
error correction systems are slightly different, but will still be
built on many of the same principles.
ChrisA
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On 2023-11-14, Dom Grigonis via Python-list wrote:
>
>> Except the 'any' and 'all' builtins are _exactly_ the same as bitwise
>> or and and applided to many bits. To do something "in line" with that
>> using the 'xor' operator would ret
other functions can easily be cobbled together.
-----Original Message-
From: Python-list On
Behalf Of Grant Edwards via Python-list
Sent: Monday, November 13, 2023 8:19 PM
To: [email protected]
Subject: Re: xor operator
On 2023-11-14, Dom Grigonis via Python-list wrote:
>
>> Exc
Fair point. However, I gave it a shot for the following reason:
I couldn’t find a way to make such performant function. Using python builtin
components still ends up several times slower than builtin `all`. Cython or
numba or similar is not an option as they do not support `truth` values. Or if
tly decent substitute for the
non-standard evaluation in R where you can arrange for lots of your data to not
be interpreted till absolutely needed.
-Original Message-
From: Dom Grigonis
Sent: Monday, November 13, 2023 10:12 PM
To: [email protected]
Cc: Grant Edwards ; Python
S
On 11/13/2023 11:44 PM, AVI GROSS via Python-list wrote:
Dom,
I hear you.
As you say, writing your own extension in something like C++ may not appeal to
you even if it is faster.
I was wondering if using a generator or something similar in R might make sense.
I mean what happens if you
Thank you, I have spent a fair bit of time on these and found optimal solutions
(at least I think so), but they are still multiple times slower than python
builtin function.
I am currently out of ideas, maybe will dig something out in time.
> On 14 Nov 2023, at 07:23, Thomas Passin via Pyt
.."
On 2023/11/13 19:47, Barry wrote:
On 13 Nov 2023, at 17:21, Jacob Kruger via Python-list
wrote:
Had a look at the following bit of introduction to using python and flet to
build cross-platform flutter-based apps using same python code, and, while it
seems to work alright if tell
(bit) > 6 else "")
return " ".join(pieces)
Many thanks for any hints
Cheers
Mike
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On 15/11/2023 10:25 am, MRAB via Python-list wrote:
On 2023-11-14 23:14, Mike Dewhirst via Python-list wrote:
I'd like to improve the code below, which works. It feels clunky to me.
I need to clean up user-uploaded files the size of which I don't know in
advance.
After cleaning the
ere a way to get the
newline in as I append to list?
Thanks again
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On 15/11/2023 07:25, Grizzy Adams via Python-list wrote:
> for s in students:
> grades.append(s.school)
> grades.append(s.name)
> grades.append(s.finalGrade())
> if s.finalGrade()>82:
>
?
I ask because it looks to me that you're:
- appending all the individual grade fields (school, name, ...) to one
long grades list containing all the data from all the students
- you're printing that single enormous list in one go at the end
What I'm imagine you want is one line
significantly slower.
Regards,
DG
> On 15 Nov 2023, at 02:34, Peter J. Holzer via Python-list
> wrote:
>
> On 2023-11-14 00:11:30 +0200, Dom Grigonis via Python-list wrote:
>> Benchmarks:
>> test1 = [False] * 100 + [True] * 2
>> test2 = [True] * 100 + [False] * 2
>
Wednesday, November 15, 2023 at 9:50, Alan Gauld via Python-list wrote:
Re: Newline (NuBe Question) (at least in part)
>On 15/11/2023 07:25, Grizzy Adams via Python-list wrote:
>> for s in students:
>> grades.append(s.school)
>>
On 11/15/2023 2:25 AM, Grizzy Adams via Python-list wrote:
Hi & thanks for patience with what could be simple to you
Have this (from an online "classes" tutorial)
--- Start Code Snippit ---
students = []
grades = []
for s in geographyClass:
students.append(geographyStu
Wednesday, November 15, 2023 at 9:45, Thomas Passin via Python-list wrote:
Re: Newline (NuBe Question) (at least in part)
>On 11/15/2023 2:25 AM, Grizzy Adams via Python-list wrote:
>> Hi & thanks for patience with what could be simple to you
>You may see responses that sugg
On Wed, 15 Nov 2023 16:51:09 - Grizzy Adams via Python-list wrote:
I don't give solutions; just a nudge... you appear not to fully grok
"list"; your list is ONE list with no delineation between students. You
want a "list of lists"...
>['Example High'
,
but it seems fairly probable to need `set() > n` and `set() < n`.
Regards,
DG
> On 15 Nov 2023, at 19:16, Peter J. Holzer via Python-list
> wrote:
>
> On 2023-11-15 12:26:32 +0200, Dom Grigonis wrote:
>>
>> Thank you,
>>
>>
>> test2 = [True]
of attribute to receive
`instance` argument on instance creation.
Regards,
DG
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here one would need `set() == n` is hard to think
> of, but it seems fairly probable to need `set() > n` and `set() < n`.
>
> Regards,
> DG
>
>> On 15 Nov 2023, at 19:16, Peter J. Holzer via Python-list
>> mailto:[email protected]>> wrote:
>>
>>
Wednesday, November 15, 2023 at 12:19, Pierre Fortin wrote:
Re: Newline (NuBe Question) (at least in part)
>On Wed, 15 Nov 2023 16:51:09 - Grizzy Adams via Python-list wrote:
>
>I don't give solutions; just a nudge... you appear not to fully grok
>"list"; yo
On 11/15/2023 2:04 PM, Grizzy Adams via Python-list wrote:
Wednesday, November 15, 2023 at 12:19, Pierre Fortin wrote:
Re: Newline (NuBe Question) (at least in part)
On Wed, 15 Nov 2023 16:51:09 - Grizzy Adams via Python-list wrote:
I don't give solutions; just a nudge... you appea
Wednesday, November 15, 2023 at 15:54, Thomas Passin via Python-list wrote:
Re: Newline (NuBe Question) (at least in part)
>On 11/15/2023 2:04 PM, Grizzy Adams via Python-list wrote:
>> Wednesday, November 15, 2023 at 12:19, Pierre Fortin wrote:
>> Re: Newline (NuBe Question) (a
e button.
Also, I've just noticed that if I move the mouse slightly while
clicking that seems to work. There are no error/warning
messages in the Console.
I'm just wondered if this is a known issue, or just my setup?
Any suggestions welcomed.
Python version - 3.10.4
OS version - Sonoma 14.1
On 11/16/2023 1:19 AM, Grizzy Adams via Python-list wrote:
Wednesday, November 15, 2023 at 15:54, Thomas Passin via Python-list wrote:
Re: Newline (NuBe Question) (at least in part)
On 11/15/2023 2:04 PM, Grizzy Adams via Python-list wrote:
Wednesday, November 15, 2023 at 12:19, Pierre
Thursday, November 16, 2023 at 7:47, Thomas Passin via Python-list wrote:
Re: Newline (NuBe Question) (at least in part)
>I wrote that you don't need the "students" list, which is correct. But
>there could be a use for a list. It would let you change the order in
>
e instance as parameter.
> Note that descriptors are stored in the class: they must not store
> instance specific information in their attributes.
> Therefore, a method informing an descriptor about instance creation
> would not help: it cannot do anything with it.
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rmation in their attributes.
Therefore, a method informing an descriptor about instance creation
would not help: it cannot do anything with it.
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ou would need a metaclass or `__inist_subclass__` is you
want your "custom method binding" globally.
For many methods (but usually not the `__...__` methods),
you can take over the binding in `__new__` or `__init__`
and populate the instance with prebound methods.
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at can be used on arbitrary methods.
Needing to inherit and add metaclasses whenever I want to decorate is not an
option.
I think I will continue with descriptor approach and am slowly finding route to
get where I need to, but still exploring options.
Regards,
DG
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e) are handled specially;
functions are bound. Other objects are returned as is.
`__getattribute__` can be used to take over control over the attribute
access.
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> language reference.
>
> Functions and descriptors accessed via an instance but found in a class (i.e.
> not directly in the instance) are handled specially;
> functions are bound. Other objects are returned as is.
>
> `__getattribute__` can be used to take over control over the attribute
> access.
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On 15/11/2023 3:08 pm, MRAB via Python-list wrote:
On 2023-11-15 03:41, Mike Dewhirst via Python-list wrote:
On 15/11/2023 10:25 am, MRAB via Python-list wrote:
On 2023-11-14 23:14, Mike Dewhirst via Python-list wrote:
I'd like to improve the code below, which works. It feels clunky t
bility.
You might find https://regex101.com/ to be useful for testing your
regex. You can enter in sample data and see if it matches.
If I understood what your regex was trying to do I might be able to
suggest some python to do the same thing. Is it just removing numbers
from text?
The for loop, &
On 16/11/2023 9:34 am, Rimu Atkinson via Python-list wrote:
Why don't you use re.findall?
re.findall(r'\b[0-9]{2,7}-[0-9]{2}-[0-9]{2}\b', txt)
I think I can see what you did there but it won't make sense to me -
or whoever looks at the code - in future.
That a
On 11/17/2023 6:17 AM, Peter J. Holzer via Python-list wrote:
On 2023-11-16 11:34:16 +1300, Rimu Atkinson via Python-list wrote:
Why don't you use re.findall?
re.findall(r'\b[0-9]{2,7}-[0-9]{2}-[0-9]{2}\b', txt)
I think I can see what you did there but it won't make sens
On 11/17/2023 9:46 AM, Peter J. Holzer via Python-list wrote:
On 2023-11-17 07:48:41 -0500, Thomas Passin via Python-list wrote:
On 11/17/2023 6:17 AM, Peter J. Holzer via Python-list wrote:
Oh, and Python (just like Perl) allows you to embed whitespace and
comments into Regexps, which helps
in a module for either speed
or to simplify things so that the RE part is simpler and easier to follow.
And, as noted, Python allows ways to include comments in RE or ways to specify
extensions such as PERL-style and so on. Adding enough comments above or within
the code can help remind people
On 17/11/2023 03:38, Terry Reedy wrote:
> There have been other reports on the cpython issue tracker than Sonoma
> broke bits of tk behavior.
> https://github.com/python/cpython/issues?q=is%3Aissue+label%3AOS-mac+is%3Aclosed
>
> shows a couple
Thanks Terry, I had a browse a
ward to me. I'll be impressed if you can write
that in Python in a way which is easier to read.
Now that I know what {} does, you're right, that IS straightforward!
Maybe 2023 will be the year I finally get off my arse and learn regex.
Thanks :)
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Well, well, well, it’s time for Python 3.13.0 alpha 2!
https://www.python.org/downloads/release/python-3130a2/
*This is an early developer preview of Python 3.13*
<https://discuss.python.org/t/python-3-13-0-alpha-2/39379#major-new-features-of-the-313-series-compared-to-312-1>Major
new featu
ch as some form of matrix or
data.frame.
And, yes, you can sort something like the above by name or GPA or number of
credits taken but the point was responding to why bother making a list just
to print it. The answer is that many and even most programs do a bit more
than that and a good choice of da
;)
Is there any more compact way of achieving the same thing?
Cheers,
Loris
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#x27;foo']} {d['bar']}")
Is there any more compact way of achieving the same thing?
Cheers,
Loris
Yes. e.g.
d.get('foo', "NULL")
Duncan
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I really can't think of a case
where the missing comma would make any sense at all.
That is pretty tricky, yes.
The comma means it's a tuple. Without the comma, it's just a string with
parenthesis around it, which is a string.
PyDev console: starting.
Python 3.9.1
="NULL"
print(f"{id} {d['foo']} {d['bar']}")
Is there any more compact way of achieving the same thing?
Cheers,
Loris
Yes. e.g.
d.get('foo', "NULL")
Duncan
Or make d a defaultdict.
from collections import defaultdict
dic = defaultdict(lambda:'NULL')
dic['foo'] = 'astring'
dic['foo']
'astring'
dic['bar']
'NULL'
Duncan
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imo$
It's treating the "2023-11" plus % at each end as separate variables to
the binding, this is crazy! I've done similar elsewhere and it works
OK, what on earth am I doing wrong here? It has to be something very
silly but I can't see it at the moment.
--
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·
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say this seems very non-pythonesque to me, the 'obvious'
default simply doesn't work right, and I really can't think of a case
where the missing comma would make any sense at all.
Maybe I've had too much to eat and drink tonight! :-)
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·
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Am 24.11.2023 um 22:49 schrieb Rimu Atkinson via Python-list:
I really can't think of a case
where the missing comma would make any sense at all.
That is pretty tricky, yes.
The comma means it's a tuple. Without the comma, it's just a string with
parenthesis around
On 11/24/23 14:10, Chris Green via Python-list wrote:
Chris Green wrote:
This is driving me crazy, I'm running this code:-
OK, I've found what's wrong:-
cr.execute(sql, ('%' + "2023-11" + '%'))
should be:-
cr.execute(sql, ('
On 11/25/2023 3:31 AM, Loris Bennett via Python-list wrote:
Hi,
I want to print some records from a database table where one of the
fields contains a JSON string which is read into a dict. I am doing
something like
print(f"{id} {d['foo']} {d['bar']}")
How
On 11/24/2023 4:49 PM, Rimu Atkinson via Python-list wrote:
I really can't think of a case
where the missing comma would make any sense at all.
That is pretty tricky, yes.
The comma means it's a tuple. Without the comma, it's just a string with
parenthesis around it, wh
15 Expression lists
> ...
> |an expression list containing at least one comma yields a tuple.
> ...
> The Python Language Reference, Release 3.13.0a0;
> Guido van Rossum and the Python development team;
> October 10, 2023.
>
I wasn't meaning that it wasn't correct Pyth
Hi all,
I apologize in advance for the "foggy"
question, but I've myself unclear ideas.
Anyway...
Python has "context manager".
For example, the "open()" class can be
simply used as follow:
with open(...) as fp:
fp.do_something()
On the other hand, it
On Sun, 26 Nov 2023 at 21:08, Michael F. Stemper via Python-list
wrote:
>
> On 24/11/2023 21.45, [email protected] wrote:
> > Grizz[l]y,
> >
> > I think the point is not about a sorted list or sorting in general It is
> > about reasons why maintaining a data
Michael F. Stemper via Python-list schreef op 25/11/2023 om 15:32:
On 24/11/2023 21.45,[email protected] wrote:
> Grizz[l]y,
>
> I think the point is not about a sorted list or sorting in general It is
> about reasons why maintaining a data structure such as a list in a prog
)
perform some operations in this context (--> body of `with` statement)
tear down the context (--> method `__exit__`).
If you do not have this case (e.g. usually if you open the file
in a class's `__init__`), you do not use a context manager.
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That is an entirely different discussion, Michael.
I do not know what ideas Guido had ages ago and where he might stand now and
I actually seriously disagree with the snippet you quoted below.
Python was started long ago as a way to improve in some ways on what was
there before. Some of the
al Message-----
From: Python-list On
Behalf Of Chris Angelico via Python-list
Sent: Sunday, November 26, 2023 6:49 AM
To: [email protected]
Subject: Re: RE: Newline (NuBe Question)
On Sun, 26 Nov 2023 at 21:08, Michael F. Stemper via Python-list
wrote:
>
> On 24/11/2023 21.45, avi.e.gr...
On 11/27/2023 12:48 AM, Chris Angelico via Python-list wrote:
On Sun, 26 Nov 2023 at 21:08, Michael F. Stemper via Python-list
wrote:
On 24/11/2023 21.45, [email protected] wrote:
Grizz[l]y,
I think the point is not about a sorted list or sorting in general It is
about reasons why
s variable name would make complete sense.
ChrisA
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On 11/27/2023 1:08 AM, Roel Schroeven via Python-list wrote:
I prefer namedtuples or dataclasses over tuples. They allow you to refer
to their fields by name instead of index: student.gpa is much clearer
than student[2], and makes it less likely to accidentally refer to the
wrong field.
+1
On 11/27/2023 10:04 AM, Peter J. Holzer via Python-list wrote:
On 2023-11-25 08:32:24 -0600, Michael F. Stemper via Python-list wrote:
On 24/11/2023 21.45, [email protected] wrote:
Of course, for serious work, some might suggest avoiding constructs like a
list of lists and switch to using
came from the Latin word for news. Be that as it
may, and I have no interest in this topic, in the future I may use the ever
popular names of Primus, Secundus and Tertius and get blamed for using
Latin.
-Original Message-
From: Python-list On
Behalf Of DL Neil via Python-list
Sent: Sunda
On Mon, 27 Nov 2023 at 13:52, AVI GROSS via Python-list
wrote:
> Be that as it
> may, and I have no interest in this topic, in the future I may use the ever
> popular names of Primus, Secundus and Tertius and get blamed for using
> Latin.
>
Imperious Prima flashes forth her edi
components of an object but verify the validity of the contents or do
logging or any number of other things. Using a list or tuple does nothing
else.
So if you need nothing else, they are often suitable and sometimes even
preferable.
-Original Message-----
From: Python-list On
Behalf Of D
On 2023-11-26, Dieter Maurer via Python-list wrote:
> If you do not have this case (e.g. usually if you open the file
> in a class's `__init__`), you do not use a context manager.
He knows that. The OP wrote that he wants to use that can
_only_ be used by a context manager, but he
On 2023-11-27, Grant Edwards via Python-list wrote:
> On 2023-11-26, Dieter Maurer via Python-list wrote:
>
>> If you do not have this case (e.g. usually if you open the file
>> in a class's `__init__`), you do not use a context manager.
>
> He knows that. The OP wro
On 27/11/23 9:03 am, Stefan Ram wrote:
Above, "have" is followed by another verb in "have been",
so it should be eligible for a contraction there!
Yes, "been" is the past participle of 'to be", so "I've been" is
fine.
--
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er:
def __init__(self):
self.cm = device_open()
self.device = self.cm.__enter__()
# Other methods here for doing things with
# self.device
def close(self):
self.cm.__exit__(None, None, None)
--
Greg
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are an easy place-holder/intro for NoSQL DBs -
in fact, Python dicts and MongoDB go hand-in-glove.
The next issue raised is sparseness. In a table, the assumption is that
all fields, or at least most of them, will be filled with values.
However, a sparse matrix would make such very 'expensi
ferent modules and do not call `parse_args` themselves.
Any ideas appreciated,
Regards,
DG
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On Mon, 27 Nov 2023 at 22:31, Dom Grigonis via Python-list
wrote:
>
> Hi all,
>
> I have a situation, maybe someone can give some insight.
>
> Say I want to have input which is comma separated array (e.g.
> paths='path1,path2,path3') and convert it to the desired o
l. But the overall paradigm compared to Python
has major differences and I see strengths and weaknesses and tradeoffs.
Your dictionary example is one of them as numpy/pandas often make good use of
them as part of dealing with similar data.frame type structures that are often
simpler or easier to
to have a class
where the device is opened in the __init__()
and used in some methods.
Any ideas?
bye,
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ssh.connect(local_machine_ip, username=username,
key_filename=private_key_path,password='abc')
print("Connected 2")
# Stop the first script: check_messages.py
stop_check_messages_command = 'pkill -f python
C:/Project/pipeline-deployment/check_
).
Note, YOUR program must now make sure that the __exit__ function is called, and
handle any exceptions that got thrown, and that ob and var are put somewhere
you can access them at that later time.
> On Nov 27, 2023, at 12:24 PM, Piergiorgio Sartor via Python-list
> wrote:
>
> O
).
Note, YOUR program must now make sure that the __exit__ function is called, and
handle any exceptions that got thrown, and that ob and var are put somewhere
you can access them at that later time.
> On Nov 27, 2023, at 12:24 PM, Piergiorgio Sartor via Python-list
> wrote:
>
> O
il.python.org/mailman/listinfo/python-list
On 11/27/23 04:29, Dom Grigonis via Python-list wrote:
Hi all,
I have a situation, maybe someone can give some insight.
Say I want to have input which is comma separated array (e.g.
paths='path1,path2,path3') and convert it to the desired output - list:
import argpa
ats Wichmann via Python-list
> wrote:
>
> On 11/27/23 04:29, Dom Grigonis via Python-list wrote:
>> Hi all,
>> I have a situation, maybe someone can give some insight.
>> Say I want to have input which is comma separated array (e.g.
>> paths='path1,path2,pat
the
base Action class's initializer with the rest of the args
super().__init__(option_strings=option_strings, *args, **kwargs)
Hopefully someone else has done this kind of thing because now I'm just
guessing!
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gs, **kwargs)
>
> Hopefully someone else has done this kind of thing because now I'm just
> guessing!
>
>
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ultdict.
>
> from collections import defaultdict
>
> dic = defaultdict(lambda:'NULL')
> dic['foo'] = 'astring'
> dic['foo']
> 'astring'
> dic['bar']
> 'NULL'
>
> Duncan
>
I have gone with the 'd.get' solution, as I am just need to print the
dict to the terminal. The dict is actually from a list of dicts which
is generated by querying a database, so I don't think the defaultdict
approach would be so appropriate, but it's good to know about it.
Thanks,
Loris
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