Does the python community care about concurrency at all? I havent seen anything new in terms of concurrency in a while.
I might be wrong about this, but walrus operator seems like a gateway to writing obfuscated perlesque code.
What’s New in Python 3.8
91–100 of 381 posts
Re: What’s New in Python 3.8
#92Earlier quoted context omitted.
> The "walrus operator" will occasionally be useful, but I doubt I will find many effective uses for it. The primary one I want is if m := re.match(...): print(m.group(1)) and while s := network_service.read(): process(s) both of which are both clearer and less error-prone than their non-walrus variants. The other one that I would have found useful an hour ago is in interactive exploration with comprehensions. I freq…
Coming from Perl, I used to want this badly, but then I thought that there's absolutely nothing wrong with m = re.match(...) if m is not None: pass Now, I wonder what you meant saying that single-line version is less error-prone, because I don't think so. I believe they're exactly the same in this regard, except for a bizarre case when someone would bastardize the code by putting some irrelevant lines between the ass…
The issue, in my opinion, is when you want something like this:
while m := f(many, args):
# do stuff with m
m = f(many, args)
while m:
# do stuff with m
m = f(many, args) # duplicate
while True:
m = f(many, args)
if not m:
break
# do stuff with m
Re: What’s New in Python 3.8
#93Earlier quoted context omitted.
Yes, there is. If x = 1 Has been the source of many errors in many languages. Forcing assignment to be more than a 1 character difference from the equality operator prevents this.
I may be missing something, but := is still only a 1 character difference, isn't it?
I should have said single-character additions or deletions . == And = have a levenstein distance of 1, == and := is 2. You can't simply make a typo and change an equality check to assignment.
So, wiki defines levenstein distance as including substitution, but I was taught or at least remember it only being additions and deletions?
Re: What’s New in Python 3.8
#94Earlier quoted context omitted.
> which itself is a result of limiting ourselves to the ASCII symbols that can be typed I think we're ready for programming languages using some visually good Unicode characters, instead of overloading `[]{}!@#$%^&*()-_/` for everything!
Oh god, this. I want a language that as I type, != Gets replaced with a proper ≠ not equals sign and proper symbols for AND, OR, and NOT.
Check out Lean Prover's online editor: https://leanprover.github.io/live/latest/
They borrow syntax from LaTeX math-mode to allow symbol entry, such that you can type "\ne" and as soon as you hit the space after the "e", you get ≠ instead.
The language plugin for Visual Studio Code does the same thing.
Lean Prover's not exactly a programming language, but :
def foo (a b : ℕ) : ℕ → ℕ → ℕ :=
λ a b, a + b
I think it has to be all or nothing though, since if it's optional the odds of getting decent editor support for it is low.
Re: What’s New in Python 3.8
#95Looks like python is trying to out C++ the C++ language with kitchen sink bolt ons.
Re: What’s New in Python 3.8
#96Still no pattern matching and no immutable vars :-(
Re: What’s New in Python 3.8
#97> Added new multiprocessing.shared_memory module Hard to understand why this is so far down. This is fantastic news!
[deleted]
Re: What’s New in Python 3.8
#98Earlier quoted context omitted.
There are programming fonts that use ligatures to convert >= to ≥, or -> to →, so the source code remains in ASCII but symbol sequences show as unique Unicode characters. A next step could be for common dev environments to actually convert symbol/key sequences to operators (how do APL programmers do it?) Avoiding ambiguity and semantic overloading of ASCII symbols would surely help beginners (if also given a UI that…
The Mac has provided easy access to symbols since 1984, with nice mnemonics like these: option-= ≠ option- ≥ option-/ ÷ option-o ø option-w ∑ I don't know why other OSes haven't adopted something similar. The first couple of these were even idiomatic in HyperCard's scripting language.
That's like visual puns, and is limited to whatever symbols seemed important to the developer at the time.
How do you discover how to type ß, °, «, ‡ etc?
Android's gboard uses phonetics (long press [s] key for ß), symbolic similarity (long press [*] key for ‡) and visual similarity (long press [<] key for «) which is guessable for some symbols, but isn't discoverable for others (you can search for emoji by name, but not symbols).
Re: What’s New in Python 3.8
#99Does the python community care about concurrency at all? I havent seen anything new in terms of concurrency in a while. I might be wrong about this, but walrus operator seems like a gateway to writing obfuscated perlesque code.
There were some changes to asyncio in this release but they were pulled at the last moment so they can better sign with Turio.
Re: What’s New in Python 3.8
#100> In this example, the assignment expression helps avoid calling len() twice:
if (n := len(a)) > 10:
print(f"List is too long ({n} elements, expected a1 = [10, 20, 30]
n1 = len(a1)
if n1 > 2:
print(f'{n1} is greater than two')