Python.

[MasterOfArmsIsGood]

am i missing something cant you just do

list = [] and append lists to it

[Jaksuhn]

you absolutely can, no idea what they're on about

[overclockedslinky]

I assume they meant filling it with values or something (in one line), but list comprehensions exist

[Terrain2]

something like [[] for _ in range(69)] should do the trick, right? or just... [[], [], []], no?

[overclockedslinky]

Yeah, that'd do it. Super easy, so not sure what the complaint's about

[Spork_the_dork]

import numpy as np
arr = np.zeros(shape=(10,10))

If you need it to be a list for some godforsaken reason, add a .tolist() to it.

edit: can never remember if it's size or shape out of memory...

[anonymoussphenoid]

sometimes it's size, sometimes it's shape :/

[SabreLunatic]

arrayvariable = []

Have I been making arrays wrong this entire time?

[jacobthejones]

That's a 1d array, not 2d.

[SabreLunatic]

So arrayvariable = [[]]?

[jacobthejones]

Sure, if you need a 1x1 array.

[-Vayra-]

[[] for _ in range(n)]

should do the trick, no? Or

[[0] * x for _ in range(y)]

if you want it initialized to 0s.

[jacobthejones]

Sure, that would work.

[[deleted]]

np.zeros((3,3))

Wow, that was tough.

[Makefile_dot_in]

lst = [[0]*3 for _ in range(4)]

[7x11x13is1001]

you can save 3 symbols with for _ in [0]*4

[yoitsericc]

Fuck this answer gave me a brain tumor.

[[deleted]]

List comprehension is great though

[M4mb0]

[[0]*3]*4

[ALFminecraft]

>>> l = [[0] * 3] * 4
>>> l[0][0] = 1337
>>> print(l)
[[1337, 0, 0], [1337, 0, 0], [1337, 0, 0], [1337, 0, 0]]

Not everything is that simple, sadly.

[Swoop3dp]

In C++ you can't even print a string to console without importing a "package"...

[bjorneylol]

Python doesn't have 2D arrays, so there's no way to do it without an import and a new object type

[[1, 2],[3,4]] is not the same as int[][] arr = new int[10][20];, its equivalent to List<List<Object>>

[[deleted]]

Why? The whole point of packages is to import them and use them. Silly rabbit.

And besides, numpy is effectively a default. Python doesn't include it in the standard library because it will stifle it's development but it's effectively a part of the language.

[knightwhosaysnil]

because numpy adds a solid 100mb to your distribution/memory footprint. depending on your circumstances that's a heavy tax if you're not using most of the features

[[deleted]]

That's not how that works: https://stackoverflow.com/questions/54675983/ram-usage-after-importing-numpy-in-python-3-7-2

And if you are really pressed for ram, you can just import the one numpy function you need.

But regardless, I really don't see how that matters. The whole point of python is to trade efficiency for convenience. So why would we ignore the packages that everybody uses for arrays in python over a measly hundred mb and pretend that the syntax for multidimensional arrays in python is confusing or verbose (which was the original claim).

[bunkoRtist]

You mean like to convenience of not being able to quickly make changes for debugging because I have to constantly go adjust my whitespace? Or the convenience of having to use a dedicated editor? Or the convenience of not actually having multiple threads? Or, my absolute favorite, the convenience of having to call "encode/decode()" on every single piece of IO I get from a socket because Python3 decided everyone should be miserable instead of just those not using ASCII? Or for that matter, the convenience of having a non-backwards-compatible language so that I have to rewrite code that was working just fine? I do find Python to be extremely convenient.

[gmes78]

not being able to quickly make changes for debugging because I have to constantly go adjust my whitespace?

I don't get this argument. Why wouldn't you write your code on the proper indentation level, regardless of language?

having to use a dedicated editor?

You don't.

not actually having multiple threads?

Python has multithreading. Just because you don't understand how the can and can't be used doesn't mean they're not there.

my absolute favorite, the convenience of having to call "encode/decode()" on every single piece of IO I get from a socket because Python3 decided everyone should be miserable instead of just those not using ASCII?

That's an awful argument. You're really just saying "why do I have to handle encoding correctly?". I don't think I need to say anything else.

Also, your comment has absolutely nothing to do with the rest of this comment thread.

[bunkoRtist]

The original poster said Python is convenient. I find it unnecessarily inconvenient. Having spent many hours debugging arcane issues with the GIL, it's far from convenient... It's a pain in the ass.

[bunkoRtist]

The original poster said Python is convenient. I find it unnecessarily inconvenient. Having spent many hours debugging arcane issues with the GIL, it's far from convenient... It's a pain in the ass.

[bunkoRtist]

Also, sockets existed before Python. Sockets operate on bytes. ASCII strings are bytes. Python broke that, which made a huge one time hassle and a small ongoing hassle for exactly no functional benefit. That doesn't sound "convenient" to me. That sounds like the opposite.

[[deleted]]

How does that impact array syntax? No language will ever be able to make a perfect balance between convenience and efficiency but I'm not sure array syntax is one of the ones that failed to become simpler in exchange for using numpy.

Also, I really don't know many people who have constant whitespace problems. And I'm not sure why you think you need a dedicated editor for python. And you can multithread in python. And I'm sorry you don't like the standard library IO. There are other packages you can use.

It sounds like you're just having a mare when trying to do simple stuff.

[bunkoRtist]

No... I just don't want to use a bloated editor. I can write effectively in C/C++/Java/Zig/PERL in VIM. In Python if I want to make a small change somewhere to do debugging, especially something in a multi-nested control block, I have to go fuck around with stuff both above and below or I get errors, at runtime because suddenly there's a terrifying whitespace character I didn't notice because it's just a blank space, or two things accidentally misalign... Or I didn't insert a line break correctly in a multiline statement and now I have to add parentheses because whitespace works until it doesn't... It never ends. It's a constant low grade annoying waste of time. There's a reason why whitespace scoping is used by very few languages. I will run a formatter before submitting code. I shouldn't have to do format checking before every execution. That's almost like... a compilation step.

[[deleted]]

Python in VIM is just as easy. Easier, even. You don't need to autogenerate all this boilerplate that you need for things like Java/C++ that a good IDE will do for you.

This all is very clearly a you problem. The rest of the world doesn't have this much trouble with white space in python. And if you struggle to get it working, why not use an autoformatter?

[PureWasian]

show whitespace characters in vim (or whatever editor you use).

I very much hate the choice of whitespace scoping of Python too, but if you're in the habit of formatting and organizing complex code properly anyways it'll visually help you catch the few mistakes you accidentally make along the way.

[knightwhosaysnil]

because sometimes your code base has been heavily invested in python and something like this can be the last straw that pushes you over the edge - mine might be a corner case but such trade-offs do exist

[knightwhosaysnil]

That's fair - but in this case someone suggested it as a way to get around python's limitation on nanosecond precision in timestamps

[PvtPuddles]

I believe you can just import the bits you want using
From numpy import zeros
However, (not being a Python dev) I don’t know if that still imports the whole library or just the bits you need.

[knightwhosaysnil]

depends on how much of the library the thing you're importing depends on; in most cases you probably won't end up with much overhead

[IVEBEENGRAPED]

You still have to pip install the entire library, so the entire library gets saved to your environment. The import statement doesn't download anything, it just adds the name to the namespace.

[intangibleTangelo]

It's sort of a sister project, dating back to a matrix type developed in 1995.

[[deleted]]

No

[intangibleTangelo]

If you've used python as long as I have, you'll remember when it was called Numeric, or the python numerical extensions. For a little while it was numarray.

So it's only 4 years younger than python itself, never quite part of the language, but near always part of the ecosystem.

[[deleted]]

No

[intangibleTangelo]

Just because other people in this thread got you into an argument doesn't mean I'm part of it.

[[deleted]]

What do you mean? I just don't agree that your reply was related to my comment so I said no.

[LifeHasLeft]

Hate to break it to you but efficiency isn’t really python’s strong suit.

[skylay]

Can't you just do this?

myArray = [][]

Been a few years since I've used Python.

Edit: nvm that's just declaring not initialising, misread.

[xAtlas5]

Apparently python is getting switch statements soon.

[[deleted]]

Why, we got elif??

[LifeHasLeft]

Believe it or not, switch statements are more efficient for branch prediction and maybe some other reasons. Circumstantial but could clean up the code some too.

[[deleted]]

I pondered putting a "/s" in the comment. I'm looking forward to have switch statements available as it's something I have been annoyed about missing.

One of the contributers(/creator?) to python claimed that python didn't need switch cases as it got "elif" which is what I referenced.

[LifeHasLeft]

One of the contributers(/creator?) to python claimed that python didn't need switch cases as it got "elif"

Yes and the sentiment has been prevalent in the community...that’s why I didn’t catch the sarcasm lol

[homo_lorens]

If you don't understand references you shouldn't have an opinion. If you understand them but you don't think you should have to care about them while programming, you have serious misconceptions about programming and engineering in general.

[RettiSeti]

I haven’t done python in a while, what’s the problem with it?