web-development

[hybrid bobcat]

yea if you wanna get into that, you can try CodeForces

[gray stone]

Yes i hate this shit

[gray stone]

is that for free or what?

[hybrid bobcat]

the minimal amount of knowledge you need to do that is at least some knowledge in alg2

[hybrid bobcat]

its free, its just practice and shit

[gray stone]

omg that need some summer shit and stuff

i dont have that much time to focus on such a thing

i already have school

anyways im into web-dev but for now its just front-end

[hybrid bobcat]

i have it too lmao , i still do them

determination = possible success , non determination = nothing

[native tide]

you should do algorithms and problem-solving, that's for sure. advent of code is running, that's a good place to start.

[hybrid bobcat]

wait is it a Python server event?

[native tide]

not linked to this discord, but it's a coding event

[hybrid bobcat]

ah

[native tide]

there's an advent-of-code channel in this discord discussing solutions too

[gray stone]

front-end ?

[native tide]

plus it covers things which you probably won't come across often, such as regex, so it's a good way to learn something new

[gray stone]

front end is much funiear man

i think back end is like a nightmare for me lol

[hybrid bobcat]

bruh

backend is easier

frontend is nightmare

you have to format those stupid css stuff

[gray stone]

u mean python sql and these shit r funny ?

[hybrid bobcat]

they're fun not funny

[gray stone]

u better step the fuck up man '

[native tide]

this is feeling off-topic

[gray stone]

idk LYC but i think front end do the colors and the fun parts

[native tide]

doing frontend becomes more enjoyable with frameworks like angular/react

they have nice libs (e.g. for animation)

[gray stone]

tell him, Nut

[native tide]

what are you on about

[gray stone]

uhmmm

i was tryna to ask if its worth to learn some web dev shit?

[native tide]

I am following along in the Django for Professionals book and I am stuck at the first chapter where you create a django project and app
using pipenv and then Dockerizing it
when running docker build . I get the following error
=> ERROR [4/5] RUN pip install pipenv && pipenv install --system
I ignored that, made a docker-compose.yml file
and ran docker-compose build
and got this error
ERROR: Service 'web' failed to build : The command '/bin/sh -c pip install pipenv && pipenv install --system' returned a non-zero code: 2
This is my Dockerfile:

FROM python:3.8

ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1

WORKDIR /code

COPY Pipfile Pipfile.lock /code/
RUN pip install pipenv && pipenv install --system

COPY . /code/```
This is my `docker-compose.yml` file:
```docker
version: '3.8'

services:
  web:
    build: .
    command: python /code/manage.py runserver 0.0.0.0:8000
    volumes:
    - .:/code
    ports:
    - 8000:8000```

[quick cargo]

Low key

Would never use pipfile

With or without docker

But even more so with docker

[strong vault]

is anyone good with flask and jinga? would really appreciate some advice on a project thanks

its a super simple project. nothing complicated :D

[half otter]

Anyone want a site made for them? I'm doing this for hours and not money. I need volunteering hours

[tribal python]

http://dontasktoask.com/

[thick kayak]

hi guys:) anyone could give me advice on where to learn django

[tribal badger]

Hey who does web dev for shopify here

[nova sparrow]

lol cant believe they made an actual website just for this

[real lynx]

Is it possible to call a function of a loaded JavaScript file from a Flask app?

I was thinking of creating an endpoint that the JS file constantly queries and that tells it what to do. But is there a more efficient way?

[wild echo]

Can I mix 2 flask apps

[wild echo]

JS is frontend, Flask is backend, wdym?

[real lynx]

I want to modify DOM elements at certain times from the backend
I have functions in a JS file to do that
Is it possible to call those functions from the backend?

[weary hatch]

hey, i had an important HTML related question? can anyone help me with that?

[gaunt marlin]

you can ask here, if anyone can answer they will reply to you

[weary hatch]

good idea, um

[wild echo]

http://dontasktoask.com/

HTML comes under #web-development i guess, which means you can skip straight to your question 😉

[weary hatch]

i have this quiz kind of thing that i have to solve, and i know one can get the correct answers through inspect element. it depends on whether the website is static or dynamic

but i'm not an expert in that field, so i wanted someone who can help me with that to tell me quickly if it's possible to get the correct answer of an mcq question on this specific website or not

[wild echo]

lmaooooooo you want us to help you cheat

nice

[weary hatch]

figure out if it's cheatable or not, yes hahah

well not really

it's complicated

[wild echo]

which website

[weary hatch]

can i screenshare?

[wild echo]

nah jus share link

[weary hatch]

it's a private organization

[wild echo]

not a problem

[weary hatch]

don't think you can access

[wild echo]

just share ffs

not about accessing

i can just check it up

[weary hatch]

sure

https://learnwise.wfglobal.org/#/

does this work?

[wild echo]

wait up

[weary hatch]

aight

[wild echo]

PM

[wild echo]

anyone?

[weary hatch]

?paste

[wild echo]

what

I would like to mix 2 flask apps, I was thinking of using subdomains but can't because the host I use pythonanywhere.com does not support subdomains in flask

[vestal hound]

look into SSEs or WebSockets

[real lynx]

Thanks 😄

[sinful pulsar]

anyone could help how to handle files in this curl?

curl --request POST --data-binary '@/home/test.bin' http://xxx/api/SubmitWebLog/

i'm using django btw

here is what i got when trying to print

using .read() gave me error

[wild echo]

you wanna curl in python?

https://reqbin.com/req/c-w7oitglz/convert-curl-to-http-request

https://curl.trillworks.com/#python

you don't request.body.read()

[wild echo]

to test your curl

[wild echo]

to implement in python

[opal haven]

I believe not

I made a quick and dirty video of live editing of a webapp, a new feature in iommi: https://youtu.be/pflnp_PvLjA

[echo mesa]

Can you help me with that?

I get an error

NoneType object has no attribute 'text'

[violet pond]

@echo mesa can you show me the relate code and what object you are attempting to get the text attribute off of?

[echo mesa]

I already solved this but thanks ! I have another problem

Can someone help me with Flask, Jinja2?
I'm trying to set the onchange of a field created using FieldList to run a function with giving the parameters of it's id
Essentially making a table of SelectField which after each one changes it will trigger a JS function which adds it's it's id to a Hidden field that on POST I will get and update the corresponding things in my DataBase

[primal kernel]

Hey there! quick question!
I'm developing a DJANGO APP and there are some actions that have to be done one time every month. I need to save the last time they were executed and show it in the app.

My question is: how should I save that date? Should I write it in a file, should I create a model for it?

Thank you !!

[native tide]

can someone help me with starting Django

well coffee first

[clear arch]

Not Found: /styles/navbar_styles.css
why does it add / before the styles?

<link rel="stylesheet" href="styles/navbar_styles.css">

[wanton gyro]

Hello, this question is regarding development
how to delete all the browsing session information such as history, cache, cookies, downloads, saved passwords, etc for an stateless webservice that allows one to interact with two web-browsers: Google Chrome and Mozilla Firefox such that the service should support endpoints /cleanup with a browser parameter which can any like chrome or mozilla?

for ex. http://<server>/cleanup?browser=<browser>
should clean up the browsing session for the given browser if has been stopped.

[faint pelican]

I think the Django documentation is the best to starttt

[vestal hound]

represents the root

[native tide]

okay

[clear arch]

so how do I get around this?

[faint pelican]

Sorryy hehe. I just started learning Django yesterdayy, tried watching videos etc but im quite slow. Try some mini project like the polls/todo app and I think i get the concept of django bit by bit

[clear arch]

nvm I just changed some settings

[faint pelican]

Hello Arnav

I think

Oh its working now

?

[clear arch]

yes

[faint pelican]

What did you change?

[clear arch]

well the path to STATICFILES_DIR was set wrong

[faint pelican]

I seee that is one of the way too

What i did yesterday was using something like this:
<link rel="stylesheet" type="text/css" href="{% static 'polls/style.css' %}">

This is my files

[clear arch]

yep and I also forgot to {% load static %}

[quaint spade]

So I have a list of items(rows) that a user can purchase, and it adds to the total price correctly when they add a new item, but when a user deletes one of the items, the price doesn't drop/update

function ListFieldRowCount( listField, totalField ) {
    var totalRows = jQuery( listField ).find('table.gfieldlist tbody tr').length;
    jQuery( totalField ).val( totalRows ).change();
}
function ListFieldRowTotal( formId, fieldId, totalFieldId ) {
    var listField = '#field' + formId + '' + fieldId;
    var totalField = '#input' + formId + '_' + totalFieldId;
    ListFieldRowCount( listField, totalField );
    jQuery( listField ).on( 'click', '.add_list_item', function() {
        ListFieldRowCount( listField, totalField );
        jQuery( listField + ' .delete_list_item' ).removeProp( 'onclick' );
    });
    jQuery( listField ).on( 'click', '.delete_list_item', function() {
        gformDeleteListItem( this, 0 );
        ListFieldRowCount( listField, totalField );
    });
}
ListFieldRowTotal( 158, 1, 7 );
//ListFieldColumnTotal( form id, list field id, result - field id );
// enable dynamic population on field that is to hold result
</script>```

any ideas?

[opal viper]

What is your gformDeleteListItem function?

[opal viper]

and also you seem to be removing the event for deleting the item when you add the item. maybe it has something to do with that?

[hollow scaffold]

Hey guys! I'm looking for a solution in Django to live enable/disable models or views that doesn't require me to perform an 'if' check in the templates

Like enable_blog=False, hide it from admin and disable the view

[slow shale]

if BLOG_ENABLED:
  class Blog(ParentSomething):
    ... awesome code ...

Perhaps? Not sure about Django.

[hollow scaffold]

@slow shale tried that the main issue is that the server has all the source code cached in the background

which means I'd have to reboot the server for it to take effect

found a workaround for disabling the view while Live, but doesn't remove it from the admin menu 😦

[slow shale]

Ohhh. You basically want Django to restart the webserver with different values.

[hollow scaffold]

I might have to

[slow shale]

Hmm. They may have "hot" reloading but that's usually reserved for development due to possible performance implications I think.

[hollow scaffold]

pretty much my thoughts

I guess I'll dig into the admin html template and see if there's a simple way to modify it

{% if module.enabled %}
<a.....>
{% endif %}

Figured it out

# blog.admin
def blogAdmin(model.Admin)
    model = Blog
    def has_module_permission(self, request):
        if checkModuleEnabled():
            return True
        else:
            return False

[haughty turtle]

@native tide when you use React with Django do you just use the standard NPM package with create-react-app?

I was reading a guide on how to use Django and React together and it seems to be just two servers running seperately, so React is rendering its own pages, while it grabs all that is needed by fetching it from the server.

So when using React really will I not be rendering anymore with Django just with React?

I see myself just using Django to return a JSONResponce and using that on any renders for any use of items in backend is this correct?

[native tide]

Yes use CRA. (create-react-app). You'll essentially have your front-end separate to your backend, with the React making API calls to your views.

Having your frontend and backend seperate means that you will have to use webpack (which CRA has scripts for) to bundle your static files. Then, Django can render your index.html of your React app and the rest is handled by the frontend. (this is done by just changing the STATICFILES_DIRS

However, you can also stick with templating and just sprinkle some React in there from the staticfiles in your Django project, that way, things are simpler and the frontend and backend are not "seperate". This would be server-side rendering while the other one would be client-side.

^ I've never tried this method but it'd be cool to know how to explicitly. Here's a cool article which helps:

https://mattsegal.dev/django-react.html

@haughty turtle

[haughty turtle]

Thanks @native tide looking into it

[native tide]

That blog kinda goes through all the webpack stuff which is already included in CRA, so this is how you actually get the react / django to co-exist on the same server:
https://blog.usejournal.com/serving-react-and-django-together-2089645046e4

Django will just render one page and the rest of the routing is done client-side

[halcyon dragon]

Pls help

@desert sand @hollow scaffold @haughty turtle @native tide

[native tide]

@halcyon dragon what are you hoping to see when you run django-admin? Try django-admin-help to see available commands.

[haughty turtle]

https://docs.djangoproject.com/en/3.1/intro/tutorial01/

django-admin startproject mysite @halcyon dragon

@native tide I mean I actually think rendering from React will be better as it prevents double the work from being done.

[native tide]

Yep there's pros and cons to server-side and client-side rendering

on server-side there's better SEO and indexing by search engines

but client-side is faster

[quick cargo]

Well...

It's slower for the user, less load on the server

[native tide]

slower for the user?

with React, since you're just mutating the virtual DOM, wouldn't it arguably be faster for the user since they don't have to wait for the server's response?

[quick cargo]

They still have to wait for the server to respond

• the js rendering time

• the sub requests that still get sent

• the extra processing time required to route and load elements to be rendered

Jinja and Django both take less than 0.1ms to render your average page

And that's with alot of templating with inheritance and all that

Slimmer pages can easily go into the micros

[native tide]

well for the first render, sure, iirc with React apps the whole application is rendered at the first request, right? But then you save time due to not having to refresh the page and the virtual DOM mutations etc

[quick cargo]

Sure you have that once it's loaded its mostly done

But you still have that biggg load time at the start

Plus things like images etc...

Client side rendering is pretty much always more of an advantage to the server not the client

If the server is any sort of reasonable and consistent latency

[native tide]

then again there are methods to split the JS downloads so you don't download the whole application at once (not that it's really a problem for the most part) but I haven't had experience with it

I think web-apps should all have some JS in there of some sorts

it adds so much more.

[haughty turtle]

How do companies do it @quick cargo ?

[quick cargo]

I think js is over used tbh

In places where it would be better without

[native tide]

@haughty turtle I heard that a general rule is to not worry about performance until it's actually a problem

[quick cargo]

From a servers perspective client side is great

Cuz suddly you cna just have one large static content server

Cache everything

Low load, high output per worker

[native tide]

talking about servers & backend, I'm really stuck between choosing express.js and django

@haughty turtle also if you're doing react and you want some really cool animations

I've heard Framer Motion is good

I've also used react-spring but the docs are not as good as I hope for more complex animations, but for simple ones it's awesome

[quick cargo]

100% django over express

Litterally no competition

[native tide]

you know what's really confusing though

on a lot of jobs (referring to fullstack, etc.) employers want node.js. it's so confusing because what is that referring to? express.js?

then you go and search for express.js jobs explicitly and it's less than that of django

[quick cargo]

Node.js has its own HTTP framework iirc

Express is shit though

Slow, unreliable and inconsistent

[native tide]

so, node.js is a backend in and of itself?

I thought it was something that encapsulates lots of other things, like an umbrella term

[quick cargo]

It can be yes

It's significantly faster than express

https://nodejs.org/api/http.html

Similar system as with go lang's inbuilt HTTP ext

[native tide]

hmm, so in that case it would be worth learning node.js?

[quick cargo]

Meh

It wouldn't hurt to get comfortable with js cuz front end

But backend wise I'm not personally massive on it

[native tide]

i'm pretty comfortable with js, it's just that I'm so confused when job listings want 'node.js'

[quick cargo]

Most will use it as a umbrella term

Cuz recruitment agency's just slap as many buzz words on as possible to get higher listings

[native tide]

yeah that's true

so I guess when they use node.js they are referring to npm libraries like react

or just js in general

[haughty turtle]

Prob to npm libraries

[wintry imp]

hi

hola

[uncut harbor]

is there anyway to both set and get to/from local storage using flask?

[hybrid bobcat]

anyone know how i can have subdomains share the same app instance with the base domain in Flask?
I have a view function that redirects to a subdomain, so like sub.base:5000 (yes i am running locally), but apparently this will not work since subdomain is not a thing for localhost, I heard I can have a thing called matching_subdomain set the true to have Flask to match against. I also specified the base domain by using app.config['SERVER_NAME'] = "base:5000" and also a hosts file on my computer (I'm in virtual environment so not really sure how that'd work).
So anyways, I've got those done, and I nevigated to the subdomain which works fine and it returns and renders a html template as I have set it to in the views. The problem is, the app.teardown_appcontext thing is called after I nevigate from the base to the sub, which makes sense to me, does anyone know how to have the subdomain and the base domain (running as localhost btw) to share the same app instance so app.teardown_appcontext doesn't get called?

#Flask #Python #WebDev

[past cipher]

anyone know if there is a Discord dedicated to Flask

all's I mostly see in here is people firing questions and getting no answers 🤣

[vestal hound]

"Node.js" can be shorthand for "JS as a backend language"

as opposed to React, Angular, Vue, etc., which use JS as a frontend language (running in the context of the browser)

[wheat cove]

Hey can anyone help me in using notebook script for website

[marsh canyon]

can you share the script

and what actually is the issue

[wheat cove]

I've made a speech to text code from scratch in colab

Now I want it to be hosted onto the web

How do I host the script and all the required libraries on the firebase

[thin dome]

hello ?

how to solve multi value dict error in django?

???

[native tide]

hello

[shy hound]

show the code

[prime parrot]

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/aiohttp/connector.py", line 936, in _wrap_create_connection
    return await self._loop.create_connection(*args, **kwargs)  # type: ignore  # noqa
  File "/usr/local/lib/python3.8/asyncio/base_events.py", line 1017, in create_connection
    raise exceptions[0]
  File "/usr/local/lib/python3.8/asyncio/base_events.py", line 1002, in create_connection
    sock = await self._connect_sock(
  File "/usr/local/lib/python3.8/asyncio/base_events.py", line 916, in _connect_sock
    await self.sock_connect(sock, address)
  File "/usr/local/lib/python3.8/asyncio/selector_events.py", line 485, in sock_connect
    return await fut
  File "/usr/local/lib/python3.8/asyncio/selector_events.py", line 517, in _sock_connect_cb
    raise OSError(err, f'Connect call failed {address}')
ConnectionRefusedError: [Errno 111] Connect call failed ('127.0.0.1', 2333)```

My Lavalink Bot cant start. This is executed on a Ubuntu based v-server

[steady trout]

Does anyone know a good tutorial for setting up a Virtual Enviorment in VS code for a django project/ django tutorial?

[gusty hedge]

https://code.visualstudio.com/docs/python/tutorial-django

[golden pollen]

anyone who knows how to fix the "Getting default adapter failed" tried on google, loats have had it, can seem to fix it tho

https://cdn.discordapp.com/attachments/463035728335732738/789095322764181524/unknown.png

im simply opening a website, literally nothing else, and it crashes down after 2 seconds (selenium)

[gleaming basin]

ok

this is my eror when i run this

[vernal furnace]

put python before django

python django-admin startproject music_controller

@gleaming basin

[gleaming basin]

alr

@vernal furnace

[fallen spoke]

I am using libmagic to check the MIME type of a file on user upload but I have 2 questions: 1. Do I need to check the file extension too? 2. as far as i know, even seemingly harmless files can be malicious (for example, mp4 can be malicious) how do I verify that the user uploaded file is not malicious? (I am using django)

[haughty turtle]

Scan it with a anti-virus on your server? @fallen spoke

Or send the file to virustotal.com through selenium and obtain the response ?

[fallen spoke]

I am not in prod curently, just local testing, but what anti-virus do you recommend that I can use with python when I go into prod

[haughty turtle]

If their ToS permits, don't see why it wouldn't allow you to.

[fallen spoke]

I think they have rate limiting?

[haughty turtle]

They allow 500 request per day on the Free API and unlimited on Premium API

Up to you if you think you surpass the 500 request per day limit @fallen spoke

As far as local scanner I like Malwarebytes, up to you which route you follow.

[fallen spoke]

Thank you so much, I appreciate it

[haughty turtle]

Scanning your file locally is going to use up Resources, so your going to have to likely upgrade at some point your local server.

[fallen spoke]

I see, thanks for the heads up, I think doing it locally would be cheaper than having to buy access to the virustotal api in the long run

[fallen spoke]

do they provide a way to control with python? I looked online and they dont seem to have anything

[remote ruin]

hey guys, how do i make my webpage properly react to zoom?
right now i have this problem

67% zoom

the background img doesnt change at all, but all the other stuff

Normal, without zooming

[haughty turtle]

@fallen spoke the paid version of Malwarebytes offers CLI Scanning, try looking for a anti-virus that offers CLI Scanning for free, if not look at automating this yourself.

[timber dune]

hi,

    def get(self, request, format=None, **kwargs):
        quiz = Quizzer.objects.get(slug__iexact=kwargs['slug']) # case insensitive LIKE clause
        questions = Questions.objects.filter(quizz=quiz)
        answers = Answer.objects.filter(question=questions)  # need help here
  
        serializer = QuizzSerializer(questions)
        return Response(serializer.data)```

how do i get all the(list of) answers object for the questions(list of objects)?

I want a serializer which will return all the questions and thier options for q quiz

[near bison]

Can you point me to a good resource about django async form validation. (no reload). ?
and , How do i verify a phone number by sending an SMS to it. ? any api's to achieve this ?

How to leverage django rest framework to achieve the form validation?

While still being able to get the csrf protection

[haughty turtle]

You can use FETCH, send a request to you server where it sends a SMS and in your page you await for a reply with the code sent all this without reloading.

@near bison

[near bison]

This is just the basic idea. i was talking about how to acheive this with rest framework and how to validate on the go. (before submit)

[haughty turtle]

@native tide yeah React is different from Vanilla JS, thought the difference would not be so huge but I can see why it would be hard to understand Vanilla JS starting from React

Ah I don't use the REST framework, and validate the code on the go would be done with JS on change state of the input field? @near bison I mean I would simply achieve all of this with JS and FETCH

[near bison]

Thanks 😄

@haughty turtle Is it necessary to render the form as a django form object ? Does this method prevent csrf atttacks ?

[native tide]

@near bison Are you using JS? If so, you can do form validation on the client-side and that would be easier & faster than having to wait for the server's response.

[near bison]

Yes. vuejs

[native tide]

@haughty turtle So with vanilla js were you using node.js?

@near bison So you could just render your form through vue.js and validate your inputs. If you need your Django backend to validate any inputs, such as whether a username / email exists, you could make an API endpoint with rest_framework and make requests to that endpoint from your frontend as soon as your form is submitted.

I recommend using the axios library over fetch, it has some advantages over it.

Also what do you mean by this:

"Can you point me to a good resource about django async form validation. (no reload). ?"

Meaning that when you submit the form, you want to page to not refresh right?

[lean moss]

If I'm going to start a django project that will eventually be deployed somewhere, is it fine if I start using a private github repo with the default security settings? Or should I clean those up before I even start a repo?

[haughty turtle]

@near bison Via JS you add a CSRF token directly into your request

[proven dune]

Why the IF doesnt execute when i enter 1 in the input?

[spiral smelt]

input always return a string, so when you type 1, the eleccion variable is actually '1'

Either wrap the input() in an int() (int(input('blah'))), or compare eleccion with '1' (if eleccion == '1':)

[proven dune]

Thanks, I realized a second later 😅

[fleet heart]

list = [1, 1, 2, 3, 5, 8, 13]
print(list[list[4]])

list2 = [1, 1, 1, 2, 3, 5, 8, 13]
print(list2[list2[4]])

Hey guy

why the list 1 show me 8, i thought it was 5 and the list2 show me 2 but i thought it was 3, like we count from 0

[haughty turtle]

@fleet heart You are accessing your index wrong

list = [1, 1, 2, 3, 5, 8, 13]
print(list[list[4]])

Here you are getting list[4] which is 5 then using that to get list[5] which is 8

It's like doing

list = [1, 1, 2, 3, 5, 8, 13]
x = list[4]
print(list[x])```

You are doing the same for list 2

list2 = [1, 1, 1, 2, 3, 5, 8, 13]
x = list2[4]
print(list2[x])```

[tacit flare]

btw is it recommended to name a variable with the name of a class?

[haughty turtle]

NO

[tacit flare]

I mean is list an appropriate name for a variable?

[haughty turtle]

list is built into Python, not recommended at all. @tacit flare

[tacit flare]

Thanks!

[fallen spoke]

How to make django use normal user db for for superusers instead of auth_user?

[vernal furnace]

wait why django is not enough for web development, why I have to use javascript? the tutor said so but everything I did was possible in django?

[stray cloud]

because websites are powered by js and JS opens new ways to interact with the DOM and more

[manic frost]

You can't really make your page interactive without JavaScript. For example, you can't do dynamic fetching or sending of messages with just HTML/CSS

[stray cloud]

At the core, you need javascript for web development

[vernal furnace]

@manic frost Isn't that what django do?

[manic frost]

Django does not exist in the browser.

Browsers can only execute JavaScript.

[vernal furnace]

@stray cloud What is DOM 👀

Ohh

Now I kind of get it

[manic frost]

The only way you can update the data on a page without JS is to reload it and simply get new HTML from the server

[stray cloud]

DOM = documeny object model its the way you interacte with HTML, CSS

from javascript

[vernal furnace]

I saw a video on youtube where he updates the status of online/offline users without reloading the page

so basically the only way to do that is with javascript?

[manic frost]

yes

[vernal furnace]

nicee

[manic frost]

Yes, basically, the browser page is stored as a nested tree structure. "DOM" is just a fancy name to make it sound more complex

[stray cloud]

Yeah, sorry for that, I am just used to the term

[manic frost]

No, the term is correct

🙂

[vernal furnace]

Wait so should I still use django ?

[stray cloud]

yes, I meant I am sorry for using it in this context :0

[manic frost]

Django is used to do the backend stuff, for example, implement your application logic, do authentication and authorization, and talk to the database.

[vernal furnace]

Can you link me to a tutorial where someone uses Javascript and Django together

[stray cloud]

Yes, you should but be sure to also get started with Javascript if you plan on developing a web application

[vernal furnace]

Javascript is kind of easy I saw it once, hope I can get used to it fast

[stray cloud]

They don't connect to each other. For example a quiz that tell you the answers after completion can be made in JS. But for storing the results for further use django is the best option.

You understand?

They always go togheter, but they do different things.

[vernal furnace]

Yes

Nicee

[stray cloud]

Also, pesonal note that I haven't done and I feel sorry for it. Learn TypeScript while/immediatly after learning JavaScript.

It will make it much easier for you in the future.

It's just like C++ for C, TypeScript just adds more features.

[vernal furnace]

oh

[stray cloud]

So, what you learn in Js applies to TypeScript anyway

[vernal furnace]

Thanks btw, Imma spend this whole week to learn javascript

[stray cloud]

You don't have to rush it. 🙂 just have fun and build simple websites on the way

[vernal furnace]

Btw, the base javascript right?

Like no react.js or stuff like that

[stray cloud]

Start with JavaScript

React, Vue, Angular they are just frameworks you have to know JS beforehand

But as I mentioned, most of them work better with TypeScript (especially Angular)

[vernal furnace]

Thank you so much

To both of you

[stray cloud]

You are welcome, my dude! just make sure to have fun!

[glass badger]

Semi-off topic, but whats the best way to install node js for a django app running on ubuntu?

[verbal snow]

I keep getting AttributeError: 'User' object has no attribute 'pk' when trying to use django admin site

[fallen spoke]

How do I store something like a token on client side like a token? cookies? local storage? something else? and how do I do it on django ( I want something that works both on mobile apps and on browsers). this might be a stupid question but I have never used any of these before so bear with me please

[verbal snow]

What ID?

I literally go to the admin site and it errors

It started out of no where

[versed python]

How can I share a website over local wifi? For example I run a django server on my laptop using pythgon manage.py runserver. How can I see that website on my mobile (connected to the same wifi)? I think this can be done using ngrok but I want a simpler solution.

[gaunt marlin]

@versed python get the local ip of your pc that hosting django , add it to ALLOWED_HOST in settings, run the server with python manage.py runserver 0.0.0.0:8000 to expose port 8000, after that you can access it from your phone in the same wifi network with "your local ip":8000

[versed python]

Yeah I just figured it out

How can I find the local ip though?

[gaunt marlin]

type ifconfig in your console

[versed python]

I found mine using npm which shows it if i change the default host

[gaunt marlin]

your local ip will start with 192.168

[versed python]

however django doesnt

[versed python]

it does

[gaunt marlin]

what does npm have to do with this?

did you ran django with python manage.py runserver 0.0.0.0:8000?

[versed python]

I am working on an npm project. I just gave django as an example

[gaunt marlin]

@versed python then you need to find out how to expose port with npm

[versed python]

Actually you already solved it

I found my ip using the command and tghen changed the npm host

Thanks!

[gaunt marlin]

you are welcome

[granite pasture]

does this channel also include whatsapp bot development?

[smoky terrace]

Django question => Lets say i want to render the same thing on all pages, I use a layout template

How do I now pass in some variables which are needed on every page.

This could be done when **rendering **something in the **view ** with the use of the CONTEXT parameter of the render function but that would be repetitive. Is there any other way to do this without repeating myself?

[marsh canyon]

you can make your own base View class where the context value is predefined

like how the generic views do it

[smoky terrace]

thanks

[marsh canyon]

wait, lemme get the docs

https://docs.djangoproject.com/en/3.1/ref/templates/api/#writing-your-own-context-processors

this

do look up some examples online

with a simple google search

Now I am curious to see how generic views handle their context 🤔

I think another way is have a base view which inherits ContextMixin and define your own get_context_data method with some defaults in place

I have not tried it tho

but worth trying out

https://github.com/django/django/blob/bb64b99b78a579cb2f6178011a4cf9366e634438/django/views/generic/base.py#L16

just like how they set kwargs.setdefault('view', self), you can do that for your values

a little more setup is required

I will try this method later and let you know

or just have a method like this

def get_context(**kwargs):
    return {
        "name": "someone",
        **kwargs
    }
``` and invoke it while rendering the template @smoky terrace

return render(request, template_name, get_context(some_info="idk", age=20)

[sinful helm]

web dev using python? 😂

that sounds horrible, my friend did it once and basically balled his eyes out and got nowhere

[chrome coral]

Would that be a good idea to make a website by using Django and using js in it? Or simply start with js?

[slim beacon]

Hey all,

I was hoping someone can point me in the right direction.

Basically I wrote a text based game in Python that asks for input from the player and prints to screen various text as part of the game.

Essentially like this:

What will you do?

walk

Player walks

What I'm trying to do is have people be able to play the game on my site. So essentially, on a page have a part where the user can input text and then the games prints to an area on the screen and this continues until the game is over.

I was looking into AJAX requests, and even having a Python IDE be rendered on the site as to run the code using Skulpt, but I'm still at a loss on how to implement this.

Can anyone point me in the right direction?

[cerulean zealot]

is there a way to extract all the clickable points

of a site knowing almost nothing of html

clickable points means get you to another link

already get

[twilit needle]

can someone pls help me with drf here?

thanks!

https://stackoverflow.com/questions/65353258/drf-help-to-solve-nested-serializers-dependency

[open owl]

you can use Selenium or BeautifulSoup

[cerulean zealot]

im failed at both

[open owl]

then learn the basics

[twilit needle]

pls ping me when help, thanks!

[cerulean zealot]

what specifically?

its too much output in a format that I don't know

[open owl]

just to use the methods defined in there..

you can share your code with us, wherever got stack

[sly echo]

Hello

Anyone?

[cerulean zealot]

url_input = ('url:')
r = requests.get(url_input) 
print(r) 
print(r.content) # The output is too long

well let me format the code, I thought nobody would take it seriously

[analog arch]

by clickable do you only want hrefs for button elements or all the hrefs

[cerulean zealot]

button elements

[analog arch]

I believe you'll have to first understand how the buttons are implemented on the given site, but if they are just <a> tags with a btn class then it should look something like this.

`from bs4 import BeautifulSoup

body = requests.get(url_input).text
soup = BeautifulSoup(body, 'html.parser')
links = [a['href'] for a in soup.find_all('a', {'class': 'btn', 'href': True})]`

[vestal hound]

why do you think it sounds horrible

[twilit needle]

https://stackoverflow.com/questions/65353258/drf-solving-nested-serializers-circular-import-dependency

The issue is now closed

This really helped me a lot, thanks! I think its worthwhile to check, too, regarding drf serializers circular import errors

[gaunt marlin]

you can use django channel https://channels.readthedocs.io/en/stable/ to implement web socket and perform changing on the website, websocket is used alot to get terminal on website

or AJAX way with https://terminal.jcubic.pl/

i would use the websocket method if it's a game

just an example https://codyparker.com/django-channels-with-react/

[slim beacon]

@o0o0keem#9279

Thank you. I did take a look at jQuery but hit a roadblock. I'm going to look more into websockets!

[strong umbra]

Can i run js in console ???

[native tide]

@sinful helm yep web dev with python. It's extremely popular.

@strong umbra in the browser console? Yes

[strong umbra]

Ok . But in cmd or power shel ??

[gaunt marlin]

powershell is just different GUI of cmd, they are basically the same

[sinful helm]

sounds like jumping through a lot of hoops just to use python instead of just using a javascript based backend

not to mention u still need to code the frontend in javascript, so its not like u are gonna avoid learning js

[vestal hound]

like what hoops...?

[sinful helm]

havent used it much but it just seems like u will need to use python + js + html + css

which seems a lot more complicated than just using js + html + css

[vestal hound]

by that logic

you could say that the only viable backend language is JS

[sinful helm]

never experimented with it too much cuz my friend had a horrible experience just coding a dropdown list while i was already done with a fully functioning website with animations, graphics and backend

[vestal hound]

good for you, I guess

[sinful helm]

for web based backend, probably?

[vestal hound]

...but if said dropdown list was in Python...

that sounds like vanilla Django

not really sure how popular that is, and it's defo showing its age

[sinful helm]

we had to run an algorithm in the backend which took about 15 seconds to run on mine

[vestal hound]

there are definitely reasons to use other languages

[sinful helm]

and on his it took 60 seconds

[vestal hound]

sounds like bad code

[sinful helm]

cuz python was slower than js, also probably cuz he sucks at coding algorithms

pythons slower than js too

[vestal hound]

there are plenty of reasons to use another framework

/language

type safety

better abstractions

shrug

[vestal hound]

it's not that simple

[sinful helm]

typescript is a thing

[vestal hound]

it is, but at the end of the day it's dynamically typed

also, there are complex type constructs that you need effort to emulate in TS

although I must say it's getting there

[sinful helm]

idk if it has better abstractions tbh, maybe it depends on the user, but i always found js to have better abstractions than python cuz u could have finer/easier control with what u wanted to do

[vestal hound]

which means that the onus is still upon the dev to ensure proper typing

[vestal hound]

I don't just mean Python

I mean another language in general

[vestal hound]

e.g. higher-kinded types

you can't do that in TypeScript

[gaunt marlin]

it's based on how you code the algorithm, not the speed of the languages

[sinful helm]

gotta google that honestly, no clue what that is

[vestal hound]

and are you actually limited by the speed of execution...?

[sinful helm]

when its only 2-4 times as fast/slow, it also depends on the speed of the language tbh

[sinful helm]

oh yes, definitely, in the case of our webapp we were

[vestal hound]

it is rare that you are actually CPU-bound and it's language overhead that's slowing you down

and if it is, well

you have options.

Cython, PyPy, etc.

[sinful helm]

for example, the same code I wrote in c++ ran in 5seconds or so

[sinful helm]

true, depends on the application

[vestal hound]

but in any case

I'd say

if speed is that crucial

maybe Go or something would be more appropriate

I think that when building a web backend

Python doesn't shine particularly well...?

[gaunt marlin]

if speed is what you need, just code in assembly 🤣

[vestal hound]

unless you're working specifically with DS/ML

but that's an edge case

[stiff karma]

Can I discuss stuff about selenium here?

[vestal hound]

sure

[gaunt marlin]

@stiff karma it's related to web so yeah you can

[vestal hound]

but if you're using it for testing then maybe #unit-testing might be more appropriate

[sinful helm]

😂

[stiff karma]

I needed some help with my code, can you look in #help-chocolate

[stiff karma]

it's not testing

It's more like fundamentals

It's giving me a stale element error

Even after I have used it to remove exceptions

[sinful helm]

tbf i got the algorithm to work under 100ms eventually

[gaunt marlin]

just for an example there already a web framework in python that can run as fast as nodejs https://fastapi.tiangolo.com/

[sinful helm]

it may also be because i dont like python as much, things like unmutable strings, and not being able to have a proper for loop still kind of frustrate me

[stiff karma]

Did anyone take a look at #help-chocolate

[vestal hound]

what do you mean proper for loop

as for mutability...honestly I prefer immutability in all things

[gaunt marlin]

maybe you not discovered everything yet of python, loop in python can have alot of implementation

[vestal hound]

but, yes, that's a preference

[sinful helm]

as in, being able to say, i++ in the for loop itself

[sinful helm]

perhaps

[vestal hound]

ah

so you mean like changing how the loop variable is updated each iteration?

[sinful helm]

u dont use python to code front end do u?

[vestal hound]

I don't think many people do

Brython is the only thing that lets you AFAIK and that's experimental

[sinful helm]

like
for i in range(0,100):
if(condition):
i+=1

hmm

[vestal hound]

yeah in that regard Python is more functional

depends on how you want to write your code, I guess

[sinful helm]

wdym?

[vestal hound]

like

[sinful helm]

can u do that in python?

[gaunt marlin]

the thing you just post can be doable in python

[vestal hound]

no, "functional" in the sense of "functional programming"

[sinful helm]

afaik u cant, but if u can, thats pretty dope

[sinful helm]

hmm

[vestal hound]

for loops like that are very imperative-style

like something you would see in C

[sinful helm]

hmmm

[sinful helm]

yeah

or C++

or java

or javascript

[vestal hound]

yeah, generally lower-level languages

[sinful helm]

hmm

[vestal hound]

if you look at FP languages (poster child: Haskell), there are no such constructs

[sinful helm]

thats why i liked javascript, cuz in that, u have for i in array, but u also have for(i=0; i<len; i++)

[gaunt marlin]

you can also access index in python

[vestal hound]

you use different abstractions to approach such problems

so, yeah, if you want to write that kind of code then at least in that aspect Python is not suitable for you

[sinful helm]

it like, combines the fine control u have from languages like C++ with the higher level language benefits

[gaunt marlin]

it's based on preference

[sinful helm]

i know, but that wasnt the issue

[vestal hound]

there are ways to do that in other languages

it's just a different paradigm

but yes, I suppose JS lets you do that

[sinful helm]

for one of the things i was doing, i wanted to skip the next iteration in the loop

[vestal hound]

continue?

[sinful helm]

so i would need to code a while loop

[sinful helm]

next interation

[vestal hound]

set a flag

and continue

[gaunt marlin]

^

[sinful helm]

so u would need to make a bool, and then continue next iteration, then set it back to false

which is pepega

[vestal hound]

shrugs

again, a tool for every problem

[sinful helm]

probably using a while loop would be easier at that point

[vestal hound]

I'd probably

find some other way to solve the problem

[sinful helm]

hmm

[vestal hound]

it's like

okay e.g. in FP languages

the purer ones

there is basically no mutable state

AT ALL

[sinful helm]

big oof

[vestal hound]

which is probably not something you would want to work with, right

[sinful helm]

i dont get

[vestal hound]

but there are such paradigms

[sinful helm]

why not have a mutable data structure

as well as an option for immutable one?

[vestal hound]

because immutability eases reasoning

[sinful helm]

just do both

[vestal hound]

no

once you have mutability

[sinful helm]

why not?

[vestal hound]

you take away certain optimisation opportunities

[sinful helm]

makes no sense

[vestal hound]

such as lazy evaluation of everything

mutability -> side effects -> no pure functions -> you need eager evaluation

[sinful helm]

i think its the opposite isnt it?

cuz once u have immutability, all your code will be less optimizable

[vestal hound]

not necessarily

[sinful helm]

well thats not true either

thaats why im saying

have option for both

[vestal hound]

no, the thing is

if you look at Haskell

[sinful helm]

so if i want to change a single value in the string

[vestal hound]

NOTHING is eagerly evaluated (which is its own problem but I digress)

because EVERYTHING is pure

[sinful helm]

i have to reassign the WHOLE string

which is o(n)

[vestal hound]

ye

not necessarily

[sinful helm]

comparatively, if it was just mutable, i could do it in o(1)

[vestal hound]

it's only O(N) if you need to keep the old string

otherwise it can be optimised to O(1)

[sinful helm]

string = string[:-1] + "s"

[vestal hound]

and in fact

EVEN if

[vestal hound]

ye so if there are no references to the original

you can optimise away the copy

[sinful helm]

ofc there are

[vestal hound]

and just modify inplace

and even if there are

there are data structures

which are optimised for such use cases

[sinful helm]

otherwise i wouldnt call it replace

[vestal hound]

such that you don't need to copy the string

[sinful helm]

thats what im saying

have both mutable and immutable data structures

and let the user decide

which they wanna use

[vestal hound]

the point is

some things are language-level

and built around the assumption that data is not mutable

at all.

[sinful helm]

for example, have istring which is not mutable

and mstring which is

[vestal hound]

and you can have immutable data structures for which modification is constant time, or very close

[sinful helm]

and let the developer deside

u are basically taking away functionality that could be there

[vestal hound]

by that logic

might as well include everything you can think of

[sinful helm]

yes

basically

[vestal hound]

which leads to bloat

[sinful helm]

no, u can #include them as needed

as in c++

[vestal hound]

it bloats the standard library

look at the interface of some of the STL containers

[sinful helm]

sure, but that doesnt matter

[vestal hound]

it's pretty wild

[sinful helm]

not much at least

[vestal hound]

why does it not?

something being part of the standard library means it is part of the standard

[sinful helm]

because if its not bloating your program, whats the problem?

[vestal hound]

therefore there are upkeep obligations

that is why the C++ standard is so convoluted

[sinful helm]

and its not like python is particularly fast, so even if it did slow down a little, doubt anyone would care

[vestal hound]

and the language is so difficult to pick up

[sinful helm]

its difficult to pick up?

[vestal hound]

it's not about speed/size of your program, but the language

I would think that C++ is significantly more difficult to pick up and get good at than most languages

pointers are complex for most people

[sinful helm]

hmm perhaps 🤔

[vestal hound]

especially DOUBLE pointers

[sinful helm]

pointers are super useful tho

[vestal hound]

undefined behaviour is scary

it's not about usefulness

but about user-friendliness

they are orthogonal concerns

the point is C++ is hard to learn because it is close to the metal AND throws the kitchen sink at you

[sinful helm]

so basically pythons a language thats easy to code in, but not necessarily the best to code in?

[vestal hound]

that's what I would say

it's an excellent prototyping language

but not really something you want to build a huge project in?

I guess you CAN

like honestly

a super simple task

[sinful helm]

i guess i also particularly have a problem with it cuz we have to make a project in it for our college assignment

[vestal hound]

even for something like JS

[sinful helm]

and its pepega

[vestal hound]

make an array

with numbers from 3 to 9

and sum them

how long does that take?

[sinful helm]

to run or to code?

[vestal hound]

to code

[sinful helm]

idk, a min?

less than a min

[vestal hound]

probably something like

[sinful helm]

yeah

i pretty much only found it useful for data science and such tbh

[vestal hound]

okay, what would you write?

[sinful helm]

cuz of all of the useful libraries and math functions and matrices and tensorflow

3 to 9 right?

[vestal hound]

ye

or any two arbitrary non-0 bounds

[sinful helm]

sum = (3+9)((3-9+1)/2)

?

[vestal hound]

no, I mean in JS, with the actual array

so you need the array too

[sinful helm]

i would use the AP sum formula

since it would be more efficient

[vestal hound]

ye but the point is you need the array and the sum

[sinful helm]

oh ok

so like an array of values?

[vestal hound]

yup

so like how would you 1. get those values into an array and 2. sum them

[sinful helm]

array.reduce(function(a, b){
return a + b;
}, 0);

[vestal hound]

(reduce is a very FP thing btw)

[sinful helm]

mhm

[vestal hound]

yeah, that's 2; what about 1?

[sinful helm]

not denying that

1>

?

[vestal hound]

(JS has really nice lambdas btw)

[sinful helm]

yeah it does

[vestal hound]

how do you get array in the first place

like

[sinful helm]

tho im not the best at them, still

where do u want the array from?

[vestal hound]

in Python it's nice to have just sum(range(3, 9))

[sinful helm]

u mean an array of values 3 to 9?

yeah

[vestal hound]

and you can prototype stuff REALLY fast IMO

although to be fair

JS is quite quick too

in terms of dev time

but JS also has really weird behaviour sometimes

[sinful helm]

[...Array(6).keys() +3]

[vestal hound]

e.g. coercion to string wy default when sorting

[sinful helm]

hmmm

[sinful helm]

it is

thats why i say pythons fucking lit for data science

but i doubt id wanna use it for much of anything else

[vestal hound]

that's a type error btw

well, not actually an error, but that won't give you what you want

[sinful helm]

cuz even if i wanna do something basic like skip the next iteration in the loop, id have to go through a bunch of hoops

[vestal hound]

you could map the result

[sinful helm]

if python had mutable strings and good for loops, it would literally be my favorite language ngl

[vestal hound]

yeah Python is not really built for that kind of thing

[sinful helm]

oh

sorry

[vestal hound]

I have almost never had to write that kind of for loop

[gaunt marlin]

what trouble of using a simple 1 line of continue?

[vestal hound]

I will note that Python's strings are bad for in-place modifications, though

but then again my question is

[sinful helm]

u cant do that if u want to skip the next iteration

[vestal hound]

if you're modifying inplace

what is your use case?

[sinful helm]

sec, ill see if i can find my code

[gaunt marlin]

you mean this ?

for i in arrays:
   if i == a:
      continue
   print(i)

[sinful helm]

fuck, i think i lost it

[sinful helm]

nope

[vestal hound]

no

something like this:

for element in data:
    if skip:
        skip = False
        continue
    result = process(element)
    if result is None:
        skip = True

[sinful helm]

i was basically trying to make a calculator that takes a string as input, for example "22x3+33(3x9)" and gives all the steps leading to the answer

[sinful helm]

thats pepega

use while loop instead

[vestal hound]

I was illustrating

[sinful helm]

ik

and im just sayin facts

lol

[vestal hound]

and then?

[sinful helm]

had to do a lot of string manipulations that would have been easier with mutable strings

[vestal hound]

so basically you're saying

you kept mutating that string?

[sinful helm]

nop

cuz u dont have mutable strings

[vestal hound]

or rather, you would have

[sinful helm]

even something as simple as trying to add a value to the end of the string

means that u have to rewrite the whole string

afai can tell

[vestal hound]

probably not the way I would have solved it

[sinful helm]

which doesnt seem efficient at all

[vestal hound]

it's not

[sinful helm]

how would u do it?

[vestal hound]

but that's the consequence of solving it that way

[vestal hound]

parse the expression into a tree of nodes and recursively simplify

shrug

[sinful helm]

1. would u be able to take into account the order of operations
2. recursive algorithm :cringe:

[vestal hound]

or some equivalent

yes

when building the tree

what's wrong with recursion?

[sinful helm]

depends how u implement it i guess, the way i have seen it done seems very inefficient

how would u implement it?

[vestal hound]

implement which part

[sinful helm]

building the tree

[vestal hound]

okay, that seems a bit overengineered for this problem unless you're doing it for fun TBH but

[sinful helm]

not sure if python has a tree data struct, if it does, i havent used it yet

[vestal hound]

split the expression into tokens

[sinful helm]

yeah, how would u do that?

[vestal hound]

regex

[sinful helm]

hmm

ok

btw, does regex use python or c code?

[vestal hound]

depends on the exact grammar of the expressions

C

[sinful helm]

fair

regex would be efficient then i reckon?

or nah?

[vestal hound]

but I think (not sure though) there is also a Python implementation if the C module is not available

[sinful helm]

wouldnt make sense to manually code it in for loops and such

[vestal hound]

well

for certain edge cases Python regexes take exponential time

(not a problem specific to Python)

[sinful helm]

oof

[vestal hound]

but in this relatively simple case, yes, would be fine

but more than efficiency...it would be more comprehensible IMO

[sinful helm]

hmm

regex is pretty incomprehensible to me sometimes 😂

but ok

[vestal hound]

yeah, they can be

the nice thing about regexes is that they can encapsulate logic

[sinful helm]

btw, how would u use regex to tokenize it, the issue too is that u need to split it but still include all the operands

[vestal hound]

yup

so first you split into tokens

there are 3 kinds, right

[sinful helm]

but thats what im asking 😂

[vestal hound]

parentheses, operators, and numbers

[sinful helm]

how would u still include the numbers and the operators, if u split it, wont one of those be gone?

[vestal hound]

no

you can split on boundaries

!e

import re

print(re.split(r'(?<=a)(?=b)', 'splitabsplit'))

[lavish prism]

@vestal hound :white_check_mark: Your eval job has completed with return code 0.

['splita', 'bsplit']

[vestal hound]

like that

[sinful helm]

but over there..

[vestal hound]

splitting on the boundary between 'a' and 'b'

[sinful helm]

one sec

what if u dont know what b is?

cuz u probably dont

[vestal hound]

you might not

[sinful helm]

22+33

[vestal hound]

but you know the class of characters it can be

[sinful helm]

u can have 23+44 too

[vestal hound]

sure

[sinful helm]

is there a class of characters for +-/*^ ?

in regex?

cuz u can also have

22+sin(45)

python basically seems like, shove everything into one line and use a bunch of inbuilt functions/libraries to do it (not saying thats a bad thing, tho it reduces the control u have over your own program sometimes imo)

[vestal hound]

you can make one

[vestal hound]

this is a bit more complex

[sinful helm]

hmm

[vestal hound]

yes

this is the philosophy

batteries included

[sinful helm]

thats the issue i was running into

[vestal hound]

which can be problematic

[sinful helm]

but then u end up with 1 line code thats basically unreadable

[vestal hound]

because you lose sight of what the abstraction conceals

[sinful helm]

like, the fuck does this even mean 😂

return stringExpression = stringExpression.replace(i, str(evaluateMathFunction(
                    mathFunction, eval(i.split("(")[1].rstrip(")")))))

i have no clue 😂

and i wrote it lmao

[vestal hound]

!e

import random
import re

operands = ['+', '-', '*', '/']
regex = r'(\d+)([+/*-])(\d+)'
exp = f'{random.randint(0, 99)}{random.choice(operands)}{random.randint(0, 99)}'

print(exp)
print(re.split(regex, exp))

[lavish prism]

@vestal hound :white_check_mark: Your eval job has completed with return code 0.

001 | 29+49
002 | ['', '29', '+', '49', '']

[vestal hound]

hm I should get rid of the leading and trailing spaces

[sinful helm]

yeah probably 😂

[vestal hound]

(which occur because I'm splitting on groups)

but yeah that's the basic concept I guess

of course if you want to handle parentheses it grows more complex

and it would probably make more sense

to use a regex to find tokens

than split like that

[vestal hound]

evalis dodgy though

[sinful helm]

import random
import re

operands = ['+', '-', '*', '/']
regex = r'(\d+)([+/*-\(\)])(\d+)'
exp = f'{random.randint(0, 99)}{random.choice(operands)}{random.randint(0, 99)}'

print(exp)
print(re.split(regex, exp))

what if u did this?

[sinful helm]

it is

[vestal hound]

did what

[sinful helm]

and im not gonna use it in the end

[vestal hound]

oh

[sinful helm]

to seperate at parenthesis as well

[vestal hound]

probably not so simple

[sinful helm]

cuz u can have

[vestal hound]

because a parenthesis must be matched

[sinful helm]

22+(2*2)

[vestal hound]

so the grammar is not the same

once you have parentheses

[sinful helm]

in js or c++ i could just keep copying into a string till i ran into a "^-+/*()[]{}"

and then copy into the next element in the array

[sinful helm]

well thats something u figure out once its tokenized

well, at least thats what i was gonna do

but i was also using stacks, probably wouldnt work with recursive trees

a friend is asking me for help, so im sorry if i take longer to reply

[amber moat]

basic question: how do i make the transition smooth when maximizing/restoring for all the UI elements in general ?

[sinful helm]

async?

[amber moat]

i tried applying it to body element(to apply to every element) but i don't see any change

[sinful helm]

not sure what that is honestly tbh man

i just know that if u dont want your UI to hang during a lot of processing, u either load it off to server side or use async programming to do it

[amber moat]

sorry if i'm not accurate with my terms.

[amber moat]

simply i'm applying a transition effect on width change

[sinful helm]

ohh

u would use a library that does it for u

or

use css

(easier to use css tbh, much easier)

.divclass {
transition: width 0.5s linear;
}

[amber moat]

UI doesn't hang but when resizing to a smaller window or to a larger window, few of the elements take little time to adjust and appear stuck for a sec

and yes im using css

[sinful helm]

so u want it to be instant?

[amber moat]

i tried body { transition:width 1s ease-in-out; }

[sinful helm]

mhm

so whats the issue?

u dont want it to take time?

[amber moat]

yeah like instant or bit smooth

the issue isn't big

tbh

[sinful helm]

try less time duration

and maybe use linear

ease in out will be slow in the start and the end*

[amber moat]

ohh

[sinful helm]

so try transition: width 0.5s linear;

[amber moat]

but it seems like it didn't apply at all i didn't see any change

will simply applying to body apply to everything ?

[sinful helm]

hmm

nop

[amber moat]

so i've to do it for every section

?

[sinful helm]

probably yeah

[amber moat]

smh

[sinful helm]

but it depends

if your sections width is defined by the body

for example, width:100%

then it will probably adjust to the body too

but pretty much everyone uses css grids now, which is what i would also recommend u to use

[amber moat]

i tried linear and 0.5s that makes the main window transition slighttly smoother but within elements don't resize instantly and appear stuck for a sec lol

so ig i've to make changes to every element lol

and also @import doesn't work for loading local CSS files

why ?

[sinful helm]

nobody uses that to load local css files tbh

@import "navigation.css"; like this?

never used it so i cant say tbh

i always used sass and compiled it into minified css or just used a front end dev framework like svelte or react to manage my css

u dont want to create too many files as that increases load times, use sass and compile it into a single minified .css file

or just include it directly into your html

[amber moat]

@sinful helm thing is there's no HTML and only css. Is there a simpler way of including local css files into the main CSS, web files work well

[loud tide]

hyyy all

pls I need sm help with my django code if anybody can hlp pls dm 😭

[amber moat]

i applied that to some of the components and it improved it very slightly

[light gale]

Hey guys, I have a django related question

from django.db import models

# Create your models here.

class Meta:
        db_table="Newpost_db"
        db_table="Newnews_db"

class Newpost(models.Model):
    url = models.CharField(max_length=100,default=None, blank=True, null=True)
    date = models.CharField(max_length=100,default=None, blank=True, null=True)
    desc = models.CharField(max_length=300,default=None, blank=True, null=True)
    target = models.CharField(max_length=100,default='_blank', blank=True, null=True)

class Newnews(models.Model):
    url = models.CharField(max_length=100,default=None, blank=True, null=True)
    date = models.CharField(max_length=100,default=None, blank=True, null=True)
    desc = models.CharField(max_length=300,default=None, blank=True, null=True)
    target = models.CharField(max_length=100,default='_blank', blank=True, null=True)
``` this is my models.py. I'm trying to create a table for my news posts as well as my 'post' posts.

I also used django rest to create an API to automatically create these posts, and it all seems to work except for one part:

Only one table is made sadly, and 'newnews' table is nowhere to be found. I did the migrations, but I'm unsure what I did wrong.

Does anyone know where I can start troubleshooting?

[quick cargo]

have you actually added the models to the admin page?

[light gale]

Oh I did not, thank you :))))

[inland stirrup]

what type of website would the following be?

it has login facility
it has articles/blogs that can be written only by admin/owner
i need the name for the type of website so that i can research in future?

[light gale]

If you need a website for articles/blogs which is super easy to setup I'd just go with Wordpress to be honest.

Most cloud providers have a pre-installed image for a wordpress website when you host an instance with them, making it reliable and easy to setup.

[orchid shadow]

Hello folks, maybe one of you can help me. I'm fighting with Django's ORM to be able to write the same kind of query as this one:

select id, max(coalesce(last_validation, creation_date)) from transactions group by user_id;

The closest I got is with the following queryset:

Transaction.objects.annotate(last_updated=Max(Coalesce('last_validation', 'creation_date'))).values('user', 'last_updated')

The problem is that the group by clause encompass all the model fields, not the one I select from values

[inland stirrup]

i agree but i want to make my own website from scratch and all
so i am using flask also can you help me on how my blueprint should look like ( i am not sure how blueprints work so can you give me some learning resource link )

[orchid shadow]

found my solution, in case it is on anyone interest: Transaction.objects.values('user').annotate(last_updated=Max(Coalesce('last_validation', 'creation_date')))

I needed to indicate earlier that I'm interested in user. The values() will force a group by by all unique combination of the given field

[light gale]

I'm not that well versed in this all, so I'm not sure how to help you Ranger, sorry.

I tried creating an API for my 'posts(not POST)'/news requests. For some reason, my my posts are being saved, but my news is not.

api/newpost is saved, api/newnews is not. Anyone have an idea where I should start looking?

they were implemented identically as far as I know

Found it! Typo somewhere 😉

[azure grove]

hey all

question for you guys if you can help

i have a form i'm trying to render onto my homepage, but i want to place the code for the form in another html

my views calls that nested html from page

my home page includes the nested html page

however when i load the server the code, the object doesn't pass into html

[spiral shoal]

Hey, I was creating a web app using flask that uses ml model to generate a file so when a form is submitted by a user with the relevant data I used a function to transfer the data to the model and the file was generated and used the send_file() function to send the file to the user to download but the generation of file is taking 30 secs or more and the page keeps loading as the file is sent after the function call returns which generates the file. The time to create file can't be reduced as model is slow but I don't want this reloading as http response shouldn't take that much time and its bad practice. Can anyone provide me with a alternative?

I just want to first render a html file that says generating your file and when file is ready I can send it to the user to download. Please help

[haughty turtle]

@native tide So with React I only have one html file? this being index.html? so if I want to change the content in my webpage entirely this is done by unmouting the current component and mounting a new component on click? So if its like this my url never changes I imagine then, if my url was google.com it will always be google.com no matter where on google.com I am navigating?

[native tide]

@haughty turtle Yep, if you want to have different routes you will use react-router library. It will just show a component when you visit that URL

[kindred osprey]

Hello
I am reading about Django and React integeration. All the videos and blogs that I went through were using "Django rest framework" for building REST API for backend and communicated using AXIOS in frontend.
We can build a REST API on Django without using Django REST framework.
So I was wondering if we could use axios POST/GET in the react frontend and connect it with REST API at the backend which is NOT built using DJANGO REST FRAMEWORK?

[haughty turtle]

I am wondering the same thing also, I am building it without rest, rest seems to be used for serialization purposes I believe

I think not using REST is fine, I will be doing the same thing.

[smoky terrace]

maybe the problem was your friend's proficiency and not the language.

[smoky terrace]

yeah, I've done that before. JS frontend, django backend

[sinful helm]

Perhaps, but doubt it, his main language of use was python

And he was decent at it and could do other stuff fine

Just wanted to avoid having to code in HTML css js but had to learn it in the end anyways

But I think he still didn’t use css so the website looked garbage

[fallen spoke]

small question, what does DEFAULT_PERMISSION_CLASSES in DRF actually mean? according to docs every one of the specified classed must be met for the request to be acted on by the server but using IsAuthenticated still allows users who are not signed in. can someone explain what it does?

[sinful helm]

And then he just scrapped it cuz mine was so far ahead in the development process and was a lot more polished

[smoky terrace]

lmao, I dont think you can make a website without html, css, and js... Python was just for the backend

backends are usually either python, java or js frameworks

[smoky terrace]

school project?

[sinful helm]

I would just use js unless u really need server side backend. Even then, I would personally still use js backend frameworks but u can use django if u want

[sinful helm]

Nah

Personal project I guess?

[smoky terrace]

oh, sounds cool

[sinful helm]

Yeah

Yeah

But if u have learnt js HTML css already, I don’t see why u would also use python for the back end, but I guess if u really love python that much

¯_(ツ)_/¯

[sinful helm]

Sometimes php 😂

Like our college websites 😂

For whatever reason they use php even tho it’s a relatively new college

[smoky terrace]

my case exactly, I've been using python for a few months, nearly half a year... I've come pretty far... I'm not so good at javascript... pretty basic... currently use django just cos I'm doing an online course that requires it in 2 projects

[smoky terrace]

I guess the devs are used to using old languages... or used a website builder

[sinful helm]

If u wanted to do frontend/UI based backend then u would still probably just use js or a js framework right?

Cuz of dom api or reactive frameworks

[sinful helm]

Hmm, not sure

[smoky terrace]

yeah, you could use both

[sinful helm]

They use sql for databases and php to fetch em

[sinful helm]

Both as in js and js frameworks? Or js and django?

[smoky terrace]

js and django, I guess the first case is also possible

[sinful helm]

Django for thé backend of UI?

How so?

[smoky terrace]

but I also guess the reason people use frameworks is to be more efficient and easier than vanilla js

[smoky terrace]

oh, I thought you meant backend of the entire system

[sinful helm]

Isn’t django mostly for server sided backend?

Mostly?

[smoky terrace]

for ui, i'm not sure django is used

[sinful helm]

Yeah

[smoky terrace]

yeah, THAT

[native tide]

@kindred osprey axios is just a request library similar to fetch, it can be used with any backend

[native tide]

DEFAULT_PERMISSION_CLASSES sets a default permission class across all of your API endpoints, so you do not have to set permission classes per endpoint (per view).

If you have set a default permission class and it doesn't seem to work, show us a snippet of the view it's not working on so we can see what's up.