ase-in
gradually - add the easy stuff now, and come back to deal with the rest
later (otherwise the typing 'tail' is wagging the coding 'dog'!)
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ations of packages to do this. Maybe a
good place to start is the Python Prompt Toolkit
(https://python-prompt-toolkit.readthedocs.io/en/master/)
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ity. Also, do I need to discuss the way so many
people ask for help but give minimum assistance to their hoped-for
respondents? https://www.catb.org/~esr/faqs/smart-questions.html ...
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modules", or something else.
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modules inside a larger "Algorithm" shape.
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documentation. A tool for including block-graphics in these is "Mermaid"
(https://mermaid.js.org/intro/).
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n for rough definition of "block") should
achieve one thing ("concern"). Thus, the advice to separate-out the
file-read and attendant defensive-coding.
This anticipates the problem (2) of distinguishing the subject of any
one error/stack-trace from any others - and, argua
> x, y
(6, 6)
However, if such were submitted for Code Review, unhappiness would result.
Was the question re-phrased to: how to ... in Python, we'd end-up with
something more like this:
>>> x = 5 # define
>>> x += 1 # increment
>>> y = x # alias
>>> x, y
(6, 6)
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= 1; b += 1; c -= 1; d -= 1
...
0 0 0 0
1 1 -1 -1
2 2 -2 -2
3 3 -3 -3
4 4 -4 -4
5 5 -5 -5
6 6
7 7
8 8
9 9
...
254 254
255 255
256 256
>>>
Be aware that this is implementation-dependent and not guaranteed to
hold forever.
dn ~ python
Python 3.12.7 (main, Oct 1 2024, 00:0
y... ('nuff said!)
With reference to the OP content about slicing:
- Python's memory-addressing is different from many other languages.
Thus, requires study before comparison/criticism
- there are major differences in what can be accomplished with mutable
and immutable objects
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.
Coursera and edX have many courses.
Harvard CS50-P (for Python) may suit...
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used.
Am sure there are plenty of how-to-installs. Here's one:
https://bgasparotto.com/install-pyenv-ubuntu-debian
Am using pyenv to support multiple projects initially built during the
reign of multiple Python versions (which now update annually - next is
about two weeks away).
--
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ific configuration hook
https://docs.python.org/3/library/site.html#module-site
Please let us know how things progress...
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456,78
Here's some old code, filched from somewhere (above web.ref?) and
updated today to produce the above:-
""" PythonExperiments:locale_numbers.py
Demonstrate numeric-presentations in different cultures (locales).
"""
__author__ = "dn, IT&am
were they ever)?
Is it user-error that some contributions don't appear on the list, but
do appear in replies, or is there perhaps some other cause?
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ou do ask for assistance you will be able to
provide only the pertinent code AND some sample input-data with
expected-results!
(although, if all our dreams come true, you will answer your own question!)
OK, is that enough by way of coding-tactics (not to mention the
web-research) to keep you on-track for a while?
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On 26/08/24 23:00, Dan Sommers via Python-list wrote:
On 2024-08-26 at 20:42:32 +1200,
dn via Python-list wrote:
and if we really want to go over-board:
RIGHT_JUSTIFIED = ">"
THOUSANDS_SEPARATOR = ","
s_format = F"{RIGHT_JUSTIFIED}{S_FIELD_WIDTH}{THOUSANDS_SEPAR
numbers:
>>> s_format = F"{S_FIELD_WIDTH}{THOUSANDS_SEPARATOR}"
To the extreme that if your user keeps fiddling with presentations (none
ever do, do they?), all settings to do with s_format could be added to a
config/environment file, and thus be even further separated from
program-logic!
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-with-the-
pico/2
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On 23/08/24 15:43, rbowman via Python-list wrote:
On Fri, 23 Aug 2024 08:36:02 +1200, dn wrote:
On 23/08/24 07:49, rbowman via Python-list wrote:
On Thu, 22 Aug 2024 10:40:52 -0700, Paul Rubin wrote:
The Pico uses MicroPython which is stuck on an old version of Python,
unfortunately.
How
-like-the-clappers!
I haven't worked with CircuitPython lately and don't know if it has pulled
in later features.
Have you (gentle reader) used both and feel able to offer a comparison -
when to prefer one over the other?
[https://www.phrases.org.uk/meanings/like-the-clappers.html]
--
R
ard web-browser, try:
https://www.yr.no/en/content/2-4164138/meteogram.svg
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ution you may be able to offer, and will look
forward to hearing of the projects you attempt...
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opponents desire!
How should a 'community' handle such? How should decisions be made, and
then communicated in such a way as to promote and build community, even
though some members may be disappointed?
Recently there was an election for PSF members. Did 'everyone' partici
On 4/08/24 09:34, o1bigtenor via Python-list wrote:
On Sat, Aug 3, 2024 at 4:06 PM dn via Python-list
wrote:
On 4/08/24 08:17, o1bigtenor via Python-list wrote:
Greetings
Looking at ESP8266 and wanting to program it using micropython (really
don't want to have to learn C++ (not enough
earning/training will be necessary as pre-requisite to
(being able to) attack the project).
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uming it hasn't) why the dict has not been sorted into a
meaningful order
3 how can one tell that the image is more likely to be a sheep than a train?
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mber that whilst context-managers and generators are
distinct concepts within Python, they are quite similar in many ways.
So, a custom generator could work like a context-manager or 'wrap' a
context-manager per Idea 1.
Building a custom-class (Idea 1 or Idea 3) enables
ng GMail and MSFT's
email services).
Python mailing-lists are covered by the Code of Conduct and monitored by
ListAdmins. Thus, there are controls which limit the impact which
advertisers and others with non-pythonic aims might otherwise exert!
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oming message is from a list - so easy
accident.)
The Delete-key is your friend!
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sting conundrum. There are good reasons and nefarious, for
such behavior.
Some have questioned my behavior in similar regard - asking why I use
initials (also used IRL). It is because my first name "David" is/was
very popular. At a meeting this week there were three of us. Thus,
"Dav
On 31/05/24 14:26, HenHanna via Python-list wrote:
On 5/30/2024 2:18 PM, dn wrote:
On 31/05/24 08:03, HenHanna via Python-list wrote:
Given a text file of a novel (JoyceUlysses.txt) ...
could someone give me a pretty fast (and simple) Python program
that'd give me a list of all
y-rate for this work?
Split into words - defined as you will.
Use Counter.
Show some (of your) code and we'll be happy to critique...
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may find a similar problem - in the similar manner to the
various members who have helped YOU, voluntarily (and despite the
paucity of source-information and response)?
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#x27;d hate to
spend an additional day or two, hunting for this info.
Again, heavily dependent upon the tool in-use. For example, most SSGs
and doc-tools (which accept Markdown) have a .css or theming-system
which enables 'decorations'.
References:
https://pypi.org/project/Markdown/
ays to improve it?
https://python.readthedocs.io/en/stable/library/itertools.html#itertools.product
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-innovation/
from which you can access their Work Programme and Guidance developed
to-date.
Please RSVP at https://www.meetup.com/nzpug-auckland/events/299764076/
* hui is the Te Reo Maori word for meeting or conference
(Te Reo is one of New Zealand's official languages)
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How to print colored terminal text in Python
MAR 06, 2024
...
https://byby.dev/py-print-colored-terminal-text
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I guess the operator "*" can be imported from any module... :-)
bye,
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/should I 'do more', and similar.
One of the valuable observations is that most of us would benefit by
improving our sleep-schedule and ensuring we do sleep for sufficient
time (probably longer than current habit).
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On 18/03/24 04:11, Peter J. Holzer via Python-list wrote:
On 2024-03-17 17:15:32 +1300, dn via Python-list wrote:
On 17/03/24 12:06, Peter J. Holzer via Python-list wrote:
On 2024-03-16 08:15:19 +, Barry via Python-list wrote:
On 15 Mar 2024, at 19:51, Thomas Passin via Python-list
On 17/03/24 23:40, Jim Schwartz wrote:
Will it be recorded?
Better than that (assumption) "coming soon" - please join-up or keep an
eye on PySprings' Meetup ANNs: https://www.meetup.com/pysprings/
On Mar 17, 2024, at 1:47 AM, dn via Python-list wrote:
The Auckland Branch
irefox - for now). A head-set
will facilitate asking questions but text-chat will be available.
Please RSVP at https://www.meetup.com/nzpug-auckland/events/299764049/
See you there!
=dn, Branch Leader
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me is not None or default_value
or:
self.name = default_value if name is None or name
because "is" checks for identity, whereas "==" and True-thy encompass a
range of possible alternate values?
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ruthy/falsy was inappropriate, please?
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self.server_port,
self.user_base,
self.user_identifier,
self.group_base,
self.group_identifier,
self.owner_base = config_access()
)
If you know my style/preferences, notice that I'm breaking
be a class-attribute (it is currently an instance.
Then, code AFTER the definition of Lookup can refer to Lookup.cache,
regardless of instantiation, and code within Lookup can refer to
self.cache as-is...
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lobals()
functions. You may also have detected that many of us try to avoid
globals and the implicit assumptions about the behavior of mutable
collections (eg lists) when treated as 'global'. Then there are
"closures", the "LEGB" rule, namespaces, scope, and ...
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e
# end of import snippet
Thanks if you have any ideas/thoughts on the matter
Jacob Kruger
+2782 413 4791
"Resistance is futile!...Acceptance is versatile..."
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On 20/02/24 01:04, Chris Green via Python-list wrote:
dn wrote:
On 18/02/24 09:53, Grant Edwards via Python-list wrote:
On 2024-02-17, Cameron Simpson via Python-list wrote:
On 16Feb2024 22:12, Chris Green wrote:
I'm looking for a simple way to make NaN values output as something
odule and package (except standard library modules
and site-packages) is modified with that function.
Final code is here:
https://github.com/mivdnber/formathack
Some of this (Expression components inside f-strings) newly available in
v3.12 (PEP-701) - which can be used in production...
tor 'holds onto' the earlier message, then how should I/anyone
know?
* yes, repetition improves learning, slightly different words may help
comprehension; but doubt I can express anything better than the
aforementioned does/did/can.
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PSL's string library: "Format Specification
Mini-Language"
https://docs.python.org/3/library/string.html#format-specification-mini-language
Has the OP stated if we're talking 'Python' or numpy, pandas, ...?
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The earlier comment was that
class S( object ):
is 'tradition', and synonymous with:
class S:
(not disputing the concept of "object" as the base class)
Not correct.
Please see last paragraph from previous message:
On Sat, Feb 17, 2024 at 7:06 PM dn via Python-li
n learn from, or
contribute to, this conversation!
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- all failures are silent
* noting "Nowadays, the Singleton pattern has become so popular that
people may call something a singleton even if it solves just one of the
listed problems." (https://refactoring.guru/design-patterns/singleton)
YMMV!
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ter's aim was to see if
posts to comp.lang.python traverse the gateway and show up on this list,
then alt.test won't help.
Coincidentally (I hope), today have received a couple of poorly-executed
spam/phishing messages purporting to be from this list or "Tutor".
is going
to be productive when communicating with a pedantic compiler?
Again, some people are suited to this business (or specific jobs
within), and some (?many) are not - but many are (perhaps reluctantly)
programming to get some other job done...
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)
Whether we (here) are talking about 'poor' manners, 'poor'
understanding, 'poor' communication skills, 'poor' Python knowledge, or
whatever; isn't such one of the rationales for this DiscussionList?
That said, we're all volunteering our (valuable) time!
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g
- CI/CD chaining you've built
- plug-ins you're finding helpful
- coverage
- testing strategies
- other testing frameworks and aids
(open-ended - what would you like to add?)
Come to participate, learn-from, and help others!
Please RSVP at https://www.meetup.com/nzpug-auckland/events/29
surprised to see them discussed in 'modern' texts. However, the
principle is: read a record from each file, do-the-business, read the
next 'pair' of physically-related records, rinse-and-repeat.
If you require further assistance: how about showing a couple of
relevant lines of t
On 15/01/24 21:13, Greg Ewing via Python-list wrote:
On 15/01/24 1:54 pm, dn wrote:
Soon after, Wirth simplified rather than expanded, and developed Pascal.
Before Pascal there was Algol-W, which Wirth invented as a rebellion
against how complicated Algol 68 was becoming.
When I first saw
On 15/01/24 14:45, Chris Angelico wrote:
On Mon, 15 Jan 2024 at 12:42, dn via Python-list wrote:
On 15/01/24 14:33, Chris Angelico via Python-list wrote:
On Mon, 15 Jan 2024 at 12:12, dn via Python-list wrote:
Here's another witticism I'll often toss at trainees (in many lang
On 15/01/24 14:33, Chris Angelico via Python-list wrote:
On Mon, 15 Jan 2024 at 12:12, dn via Python-list wrote:
Here's another witticism I'll often toss at trainees (in many languages,
and especially in UX): just because we can do it, doesn't make it a good
idea!
Programm
On 15/01/24 11:47, Chris Angelico via Python-list wrote:
On Mon, 15 Jan 2024 at 09:40, dn via Python-list wrote:
The basic challenge came from my earlier (and blasé) repetition of the
Python refrain "everything in Python is an object". Which led to:
...
So, no, there's an &qu
ith the 'walrus-operator'?
PS our interlocutor doesn't like colloquialisms such as these - despite
them being near-and-dear to our hearts!
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)
Admittedly, a #-comment does not qualify as an object; but then the hash
is an exclusion signal, which the lexer understands as ending the
logical line.
Thus, a comment has meaning at 'compile time', but not at 'execution
time'. Such would be true, strictly-speaking. However, most of us would
say that a comment 'has no meaning' in terms of the parser, and what it
delivers.
Shall we change the phrase to "everything in Python, at run-time, is an
object"? As a phrase it is obiter-dictum, not ratio decidendi! (to use a
language which has only extended in dubious modes for the last
couple-of-thousand years - but which still has illogical structure)
Suspect that clumsy exclusion also lacks precision to the standard being
demanded. Thus return to the suggestion that you seem in the wrong
place, because Python doesn't meet the required standard. Sorry!
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d Python's
structure to some golden-ideal?
Web.Refs:
https://docs.python.org/3/reference/compound_stmts.html#the-for-statement
https://docs.python.org/3/reference/simple_stmts.html#grammar-token-python-grammar-target_list
https://docs.python.org/3/reference/compound_stmts.html#function-definitions
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On 14/01/24 16:48, Chris Angelico wrote:
On Sun, 14 Jan 2024 at 14:43, dn via Python-list wrote:
Similarly, whilst we could write:
a, b, c = 1, 2, 3
I would only do this when it aligns particularly well with the
algorithm being implemented. For example, you could start a Fibonacci
e lines)
Similarly, many dev.teams have a 'standard' which suggests that once a
function/method has three or more arguments, relative-positioning should
go out-the-window, in favor of named-arguments. This speeds
comprehension and reduces errors.
In the original mental-model, the difficulty was which file-descriptor
would be paired with which file (previously described). The multiple
as-s make it more readable and more comprehensible.
Since it looks like you are doing this for educational reasons, I
think there's a tiny bit of value to my effort.
That's what we're (all) here for!
(and not forgetting that the OP described a skill-level well below that
of most of this post and your question, which enabled (and deserved,
IMHO) appropriate respect).
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insert your question here: What do you want to know? What has been
bothering you about OOP (or O-O in Python) that you'd like to settle?
To join us (we don't bite!), please RSVP at
https://www.meetup.com/nzpug-auckland/events/298536620/
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into a MongoDB or RDBMS.
** code
""" PythonExperiments:rich.py
Demonstrate string extraction.
"""
__author__ = "dn, IT&T Consultant"
__python__ = "3.12"
__created__ = "PyCharm, 14 Jan 2024"
__copyright__ = "Copyright © 2024~"
__licens
s a rude comment about wiping noses - but probably a step too far
wrt the CoC)
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it is bounding-parentheses which define).
In this case, the issue is 'connecting' the context-manager "expression"
with its (as) "target". These should be more-closely paired:-
with ( open( 'example.txt', 'r', ) as e,
open( 'emails.txt', 'w', ) as m,
open( 'salutations.txt', 'w', ) as s
):
(NB code not executed here)
A data-architecture of having related-data in separated serial-files is
NOT recommendable!
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those three steps, if there's something that's
still mystifying, please refine the question...
Web.Refs:
https://en.wikipedia.org/wiki/Collation
https://docs.python.org/3/reference/expressions.html?highlight=comparison#value-comparisons
https://docs.python.org/3/howto/sorting.html?hi
ereafter...).
"But wait, there's more!"
(assuming implement as-above):
if 0 <= ts_reading < 400:
1 consistent 'direction' of the comparisons = readability
2 able to "chain" the comparisons = convenience
3 identifier is PEP-008-compliant = quality and style
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ingest a large browser bookmarks JSON
file. It wouldn't matter for a much smaller file, of course.
It would be safer if you used literal_eval.
Ah, memories of Python2...
Does this little hack still work?
What about True/False cf true/false?
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ctive advice, suggestions, and alternate approaches
will be valued ...
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es all mashed together?
Yes, what changed after removal of all the .append()-s, and instead,
within the (second) for-loop print( school, name, ... ) was used?
Is it easier to go on from there?
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NZPUG Auckland Branch):
https://www.meetup.com/nzpug-auckland/events/295433874/
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at does mean? Is there a change from python2 to python3?
Works for me (Python 3.11 on Fedora-Linux 37)
- both as a script, and simple/single import.
What happens when you extract the second dimension's definitions into a
module of their own, and import that (with/out less-sophisticated join)
n-installer, or if something, somewhere, will 'break'?
(yes, there's an upgrade to Fedora 38 in "The Backlog")
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bout "closeness".
Thus, what you might expect from email servers and Admins, NOT what you
should do. That part should be quite evident by now!
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,
or (more likely) MailAdmin -> me)
* however, this can end-up perpetuating the mistake, rather than
correcting...
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ation that you'd fix the
problem with the sender...). However, ...
There are some large businesses doing what you've outlined. They have
not solved this problem - and not through lack of trying!
* as fast as you make something idiot-proof, the world will show you an
'improved' class of idiot!
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ge.Message:
I just don't know why that particular line isn't working.
Will need more context. What is the objective? What is the
source/pre-processing of these data-items. (etc)
* Left-out .au, (a less important geo-TLD) to wind-up @Chris...
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ppear that (at least one message) did not make it to email -
neither to the list-archive.
People wishing to learn are unable to benefit a response, if it is not
sent to the list!
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-reference" (because class has
not yet been fully defined) - see
https://mypy.readthedocs.io/en/stable/cheat_sheet_py3.html#forward-references
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Principle", "do one thing, and do it well", Law of
Demeter, ...)
Personal comment: my habit is to break specs into many classes and
functions - sometimes more-so than others might prefer. Cannot recall
when last had that hard-to-locate bug of unwittingly re-using a name/alias.
(apologies: not a boast - a recommendation for going modular)
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=dn
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On 04/10/2023 19.41, Chris Angelico via Python-list wrote:
On Wed, 4 Oct 2023 at 15:27, dn via Python-list wrote:
- should the class have been called either;
class SomethingSingleton():
or a Singleton() class defined, which is then sub-classed, ie
class Something( Singleton
Values is 'going'?
- this article (https://python-patterns.guide/gang-of-four/singleton/)
mentions that the original GoF Singleton Pattern preceded Python
(particularly Python 3 classes). Also, that Python doesn't have
complications present in C++. It further discusses "several drawbacks",
which also champion 'readability' over 'trick' or 'sophistication'. I
think you'll enjoy it!
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=dn
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On 01/10/2023 11.25, Karsten Hilbert via Python-list wrote:
Am Sun, Oct 01, 2023 at 09:04:05AM +1300 schrieb dn via Python-list:
class WorkingSingleton(Borg):
def __init__(self):
print(self.__class__.__name__, ':')
eady_initialized' for class
'WorkingSingleton'.
but:
self.already_initialized:bool
passes without comment (see @Mats' response).
Question: is it a legal expression (without the typing)?
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=dn
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it will be interesting to see if in-future, I notice when the
project is based upon an older system!
FYI
https://www.jetbrains.com/help/pycharm/installing-uninstalling-and-reloading-interpreter-paths.html
(I'd be surprised if the other major tool-sets don't offer something
//www.python.org/doc/sunset-python-2/)
- were this code to be written using today's libraries, it is unlikely
to look anything like this
(which may also be contributing to the dearth of replies)
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=dn
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s, and IceHouse
Ventures.
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=dn
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Learning Django Co-op.
RSVP at https://www.meetup.com/nzpug-auckland/events/295727130/
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On 24/08/2023 06.11, dn via Python-list wrote:
On 24/08/2023 03.41, Jason Friedman via Python-list wrote:
with Database() as mydb:
conn = mydb.get_connection()
cursor = conn.get_cursor()
cursor.execute("update table1 set x = 1 where y = 2")
cursor.close()
cursor = conn.
mydb.query( "update table1 set x = 1 where y = 2" )
mydb.query( "update table2 set a = 1 where b = 2" )
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=dn
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import identifier, ..." does not save storage-space
over "import module" (the whole module is imported regardless, IIRC),
however it does form an "interface" and thus recommend leaning into the
"Interface Segregation Principle", or as our InfoSec brethren would say
'the principle of least privilege'. Accordingly, prefer "from ... import
... as ...".
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=dn
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