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From: dn <PythonList@DancesWithMice.info>
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Subject: Re: Two aces up Python's sleeve (Posting On Python-List Prohibited)
Date: Sat, 9 Nov 2024 08:09:49 +1300
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Bytes: 5838

On 8/11/24 14:40, Mild Shock via Python-list wrote:
> Well you can use your Browser, since
> JavaScript understand post and pre increment:

Question: are we talking Python or JavaScript?


> So we have x ++ equals in Python:

Trying to find a word-for-word translation serves as badly in 
computer-programming languages as it does in human spoken-languages. 
Learn how to adapt and embrace the differences...


>      x + = 1
>      x - 1

The above probably only 'works' (the way you expect) in the REPL.


> But I don't know how to combine an
> assignment and an expression into one
> expession. In JavaScript one can use

Again!

"Everything should be made as simple as possible, but no simpler."

Check out "The Zen of Python" and PEP-0008 for Python idioms.


> the comma:
> 
>  > x = 5
> 5
>  > y = (x += 1, x - 1)
> 5
>  > x = 5
> 5
>  > y = (x += 1, x)
> 6
> 
> But in Python the comma would create a tuple.

Exactly, just as driving on the left side of the road will be fine in 
some countries but cause a crash in others. Learn the local rules FIRST!


The 'walrus operator' could be applied:

 >>> x = 5
 >>> y = (x := x + 1); x
6
 >>> 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)

-- 
Regards,
=dn