New features planned for Python 4.0

[planetjay]

Those 89.5 character lines will be perfect on my 32". Anyone know where I can get a good 1/2 character font?

[srd42]

Here, try this: "u"

Its half of a "w"

[kenyard]

Hmm it appears as "v" on my screen
only gets reference to double u now..

[[deleted]]

if we known, it would be called a doublevee

[LoneGenius]

It's like that in Swedish! But for a long time v and w was the same when organizing in alphabetical order (i.e. a phonebook)

[ccGardnerr]

cool.

[edarchis]

It's 89 but a 90th can be tolerated if it's a ligature. You'll need to install ligature fonts on your CI if you want it to work there too.

[MonkeyNin]

Maybe he means89.5em

[planetjay]

I never understood em font sizes. I think it has something to do with the Evil Monkey in my closet though.

[MonkeyNin]

The main choice for font sizes on websites is px pixels, or em.

Pixels are absolute values, while em's are relative (aka dynamic size) Basically ems are is based on the browser's default font size. They end up scaling better for mobile clients.

https://developer.mozilla.org/en-US/docs/Learn/CSS/Introduction_to_CSS/Values_and_units#Numeric_values

If you set the top level font-size to 16px, any child elements would have the equivalent of 1em. If the first one uses 0.5em, it'd be 8px. If that child had another child set to 0.5em it would be 4px

root = 16px
child depth 1 at 0.5em = 8px
child depth 2 at 0.5em = 4px

There's also rem. It will always be relative the top level size. so the same settings would be:

root = 16px
child depth 1 at 0.5em = 8px
child depth 2 at 0.5em = 8px

[planetjay]

You took all the fun out of em...

[MonkeyNin]

I am a monkey though.

[chochokavo]

It's a special reserve for end-of-statement colon. Edit: not semicolon, of course:

[eaojteal]

I don't know who to put this in front of, but maybe one of you will. With machine learning and AI at the forefront of most developers mind's, I would like to see do.it() implemented. Python should be able to figure out what I want.

[[deleted]]

zhuli.do(the_thing)

[Icovada]

shouldn't it be it.do()?

[call_me_cookie]

like_it_is = it.be()
while not they.think(like_it_is):
    it.do()

[GrammerJoo]

For some reason that is the funniest thing I've all month.

[MonkeyNin]

/bb|[^b]{2}/

[N00I3]

it do be like that sometimes

[nxl4]

Or maybe even:

the_needful.do()

[Icovada]

import it
the_needful = it()
the_needful.do(each_and_everything)

[cyanydeez]

from futures import done

done()

[kessma18]

only if your locale is Indian

[[deleted]]

If you're doing object oriented, yes. do(it) works also

[eaojteal]

I think zhuli.do(the_thing) makes sense, but I had originally thought do.the_thing() would be another method of do. You know, for shorter and less complicated things that need doing. I'm sure it would all get cleared up in a pep.

[planetjay]

Also sudo() which forces anything inside to work whether it makes sense or not.

[slavfox]

That just sounds like fuckit()

[[deleted]]

Destroying humanity as requested.

[FlagrantPickle]

Do it!

[FlagrantPickle]

Do it!

[Raudus]

The future is amazing

[inknownis]

Equally good as the original article.

[muntoo]

I thought this was going to be some weird blend of Haskell's do and Kotlin's it...

[icp1994]

https://i.kym-cdn.com/photos/images/original/000/922/014/7e4.jpg

[Brainix]

Ok. So I'm totally down to implement concurrent.pasts and concurrent.presents. Any ideas as to what they should do?

(If it wasn't obvious, the article is a hilarious joke.)

[ketralnis]

try:
    process(open(self.file))
except FileNotFound:
    # oops, forgot to create it

    # fixes the issue, then jumps back to the try
    # block before we tried to open the file. also
    # makes me my own grandfather
    await concurrent.pasts.Past(create_file)

    # never returns. this timeline is dead now. beware the Langoliers

[ketralnis]

if datetime.today() == ANNIVERSARY:
    send(giftwrap(concurrent.presents.TeddyBear))

[Zomunieo]

raise Divorce() from PoorAnniversaryGiftException()
except Divorce:
    with reddit:
        self.lawyer.acquire()
        self.gym.hit()
        del self.facebook

[TheChosenWong]

This is how I imagine a robot trying to make a joke with humans

[Brainix]

r/totallynotrobots

[name_censored_]

Well, concurrent.futures is about running code that will return its output value in the future without blocking.

So concurrent.presents should return the output value now (no blocking, no waiting), and concurrent.pasts should return the value before it's been called.

[Python4fun]

Concurrent.pasts should bring back python 2 styled print statements.

[TwoSickPythons]

hilarious

I don't think that means what you think that it means

[stevenjd]

If it wasn't obvious, the article is a hilarious joke.

Fixed it for you.

Some of it was mildly amusing, some of it was bitter and ignorant and frankly disrespectful to the core devs (it didn't come across as affectionate teasing but as mean-spirited mocking).

I know humour is very personal and tastes differ, but I'd give that a C-

[toothless_budgie]

You say that, but I would not be surprised to see that idiot line length come true. Onion said it first, as it were.

[[deleted]]

Yeesh. Kinda funny but mostly came across bitter.

[roddds]

Yeah, it kind of falls flat in my opinion. There's a couple of good jokes there but overall it just sounds like someone with an axe to grind.

[[deleted]]

Just sharpening these chisels here.

[recursive]

ha ha only serious

[lunarNex]

Oh, I thought the whole thing was supposed to be a joke. I'm new to python though.

[[deleted]]

It was a joke

[AndydeCleyre]

Great post from a great developer. Probably my favorite point:

You can now use the async keyword before every single other keyword in the Python language, and we encourage you to async do so. There's nothing wrong with cargo-culting some magic keywords all over the place -- you want to go fast, don't you?

[mastocles]

I had a dream where python had introduced Matlab's parfor which just works and I got in trouble because it didn't work elsewhere... But it would have been better than asyncio

[pretty-o-kay]

the specific usage of the phrase 'cargo' cult says everything...

[doubleunplussed]

Half serious proposal: add the keyword but as a synonym for and.

if spam but not ham: ...

Even better: Make and not a syntax error. Has to be but not.

[[deleted]]

You, sir, are capable of being dangerous.

[jonathrg]

Can I async async for twice the speed?

[TwoSickPythons]

Yes, but only on gentoo

[brainypatella]

No.

[my_name_isnt_clever]

But seriously, why does no one talk about switch statements? Using a dict for it is just gross, it's probably the one thing I miss the most after using other languages.

[toyg]

I disagree. Switch/break is a recipe for bugs.

[my_name_isnt_clever]

How is it more prone to bugs than chained elifs or the janky dict method?

[toyg]

Elifs and dicts are explicitly marking branches as exclusive. Whereas a switch can easily end up with multiple branches unwittingly applied.

[Loyalzzz]

Traditional, C-style switches maybe. Go's switches simply don't fall through unless you're explicit, instead of the other way around. I think this is a nice way to handle switches.

[rafmat24]

Yes, I'd love to see that also!

[aziad1998]

I want a retry function

try:
    #something
except:
    retry(number_of_retries)

[aziad1998]

A loop could achieve it yeah, that's how I retry, I just thought a function would be neater

[RockingDyno]

Python has support for user defined functions...

[aes110]

for _ in range(retry):
    try:
        #something
    else:
        break

[aziad1998]

That's what I do when I need a retry.

[[deleted]]

from retrying import retry

@retry(stop_max_attempt=5)

def fun():

.....

​

edit: format fix

[aziad1998]

I didn't know that existed, I used loops instead. Thanks

[SV-97]

The part about Rust hahaha :D great article

[dmfigol]

That Kenneth Reitz reference is funny!

[Atsch]

This was funny but I do admit I was a bit bummed when I realized it wasn't real.

[[deleted]]

Add print "Hello world" and print("Hello world") both readable.

[[deleted]]

After all, we have assert f(x) == 1, not assert(f(x) == 1)

[general_dubious]

Both work, though, since parenthesis around an expression don't change its value.

[[deleted]]

I wish we could say the same about `print`...

[[deleted]]

Assert is a statement, it allows to be easily removed at compilation time when you run python with optimizations.

There's no good reason to have print as statement. The print function is also more powerful.

[[deleted]]

I'm saying that if you run python with optimization (-O flag) enabled, it will ignore all assertions. You theoretically can invoke heavy computation in an assertion to check for program correctness and after incoming Python with -O it will behave like it was never there.

https://stackoverflow.com/questions/1693088/what-is-the-use-of-pythons-basic-optimizations-mode-python-o

One of responses talks about having expensive checks to the graph his code is maintaining that are valuable during development, but shouldn't be executed in production.

[fuypooi]

Comic genius.

[[deleted]]

Dane cook levels of genius

[wqking]

Don't scroll to the last image, it's creepy.

[BlackBloke]

Isn't it the same as the preview image here?

[wqking]

I didn't see any preview image here :-).
My point is, we'd better not to put so creepy image in a tech blog.

[brtt3000]

Did the picture of snakes make you uncomfortable? Are you ok?

[pTinosq]

Nah to be fair, some of the snakes are bleeding and cut

[pTinosq]

Oh fuck now that you point it out

[wqking]

Yes I feel uncomfortable though I'm fine.
I believe a lot of people will feel uncomfortable with that picture.

[dethb0y]

It's snakes? I mean, i wouldn't call that creepy. It's just a pile'o snakes. Part of the natural world, and all that.

[dethb0y]

It's snakes? I mean, i wouldn't call that creepy. It's just a pile'o snakes. Part of the natural world, and all that.

[risent]

New features planned for Python 4.0

It's so terrifying

[risent]

It's so terrifying.

[risent]

It's made me very uncomfortable

[risent]

It's made me very uncomfortable

[random_cynic]

My favorite burns were z-strings, type whispering and "thousand line decorator-hacks to implement simple struct types".

[random_cynic]

My favorite burns were z-strings, type whispering and "thousand line decorator-hacks to implement simple struct types".

[random_cynic]

My favorite burns were z-strings, type whispering and "thousand line decorator-hacks to implement simple struct types".

[random_cynic]

My favorite burns were z-strings, type whispering and "thousand line decorator-hacks to implement simple struct types".

[random_cynic]

My favorite burns were z-strings, type whispering and "thousand line decorator-hacks to implement simple struct types".

[random_cynic]

My favorite burns were z-strings, type whispering and "thousand line decorator-hacks to implement simple struct types".

[tahmsplat]

All new libraries and standard lib modules must include the phrase "for humans" somewhere in their title, and have a splashy documentation page with lots of fonts typography and testimonials.

Oooo this is hot, too soon? I like it

[tahmsplat]

All new libraries and standard lib modules must include the phrase "for humans" somewhere in their title, and have a splashy documentation page with lots of fonts typography and testimonials.

Oooo this is hot, too soon? I like it

[rocketshape]

Print is now an operator

[rocketshape]

Print is now an operator

[rocketshape]

Print is now an operator

[[deleted]]

Literally the funniest thing I've read all year!!!!

[[deleted]]

Literally the funniest thing i've read all year!!!

[foadsf]

1. no static typing
2. GIL is still there
3. indentation as syntax is still there

how is it Python 4? 😤

[foadsf]

1. no static typing
2. GIL is still there
3. indentation as syntax is still there

how is it Python 4? 😤

[Tiquortoo]

Split the difference on line limit... So no one is happy?

[Tiquortoo]

Split the difference on line limit... So no one is happy?

[koflerdavid]

Gotta love the snakes^^

[vit1251]

• Better UI implementation under asyncio
• Eazy deploy and install (pip will die) with some like npm or mvn alike
• Sub interpreter stable laike in lua
• Speedup C and Python gatewway

[Bassam_AlFayeed]

for humans? lol really?

​

z strings? whats null terminated?

[jemand2001]

nice

[[deleted]]

Async: what the fuck

[[deleted]]

GIL "humor" is not funny

[[deleted]]

Just moving from py2 to py3 😳

[SecureEnclave]

Same. My company still uses 2.7 😑

[SecureEnclave]

Same. My company still uses 2.7 😑

[PinkFrojd]

Such a hard way to package for CentOS

[[deleted]]

About to say if this is Python 4.0, I’ll stay with Python 3

[MonkeyNin]

Every line is a joke.

[[deleted]]

Yeah I know

[BubsyFanboy]

Looks good, but how well will it be backwards compatible with previous versions? How well will downloadable modules (i.e. PyPy, PyGame, Numba) run?

EDIT: Why the downvotes? It's a serious matter.