What Are Python DECORATORS??  

the most important thing is that decorators should cover possible arguments to function def wrapper(*args, **kwargs): func(*args, **kwargs)

This is the most straightforward explanation of Python decorators I've seen so far.

Decorators are one of the many beautiful layers of Python. My favorite practical usage was a decorator that allows me to keep a database connection open and automatically rollback in case of an error.

to make it more clear, a decorated function called f basically does this: f = my_decorator(f)

I just needed a simple example of how decorators work to get the function name for error logging. Thanks

Kudos! This made WAY more sense than the 30 min video i just watched 😂

FINALLY UNDERSTOOD IT!!!! thank you 😃

Solid work. I was just wondering about these, lol

I have learned something that i used to do manually Thanks

That's very functional for the imperativetiness of Python

Function pointers from c/c++

What's a real world example as to why you would do this as opposed to just calling the functions normally?

Man, one can easily drag this into 30 mins *demy class.. Thank you.

Thanks bro big shout out❤❤.It was great..

Dude thank you this is great thanks

Beautiful!

I first learned decorators when writing Ruby code a long time ago and still don't like them because they make code less readable. But, like ternary operators, we all still use them 😂

Me after 3000000 tutorials of decorators abt how they work, this video👿:

Well explained

I hope 🤞 one day I’d be able to code 🧑‍💻 like you bro 😎

Ty!

Awesome is what they are.

I'm learning new coding things everyday! You got some info on dictionaries? That would help!! You got a subscriber!!!!!!!!!!

Decorators? To me, sounds like a nice Christmas gift with a lot of fancy "decorators" lol

This is actually a monad!! It’s super cool that python has explicit support for them!

Jeez. Decorator had been just a separator between cool code and just code for me. Thank you for letting me know what decorator is and the usefulness of decorator.

Thx man

That just looks like functions but with extra steps

excelente..muchas gracias!

*laughs in closures*

I needed to know this!

I know how to do print("Hello World!") can I join the club?

Also ChatGPT: class MyClass: def __init__(self, arg1, arg2): self.arg1 = arg1 self.arg2 = arg2 def existing_function(self): # Logic of existing function result = self.arg1 + self.arg2 print(f"Result: {result}") return result def my_function(self, custom_class): # Using custom_class into my_function result = custom_class.existing_function() # Additional actions print("Additional actions") return result obj1 = MyClass(10, 20) output = obj1.my_function(obj1)

Tnx

Sounds a lot like a class with a constructor

You are amazing at this!

I thought he was gonna rap about python and was excited. Still good video😅

ChatGPT was suggesting to use decorators in my code and I've never heard of it at that point! So my answer was like I know christmas is around the corner but stop hallucinating about decorating my code😂😂

Nice example, I know what it does, I don't know what it can be used to.

Looks like a callback function in javascript to me.

Excellent

What would be the typical use case of a decorator? Solely for logging?

Brain explosion

Looks redundant to me that innermost function especially just calling it direct looks cleaner but i feel there must be a reason for the wrapper

Subscribed

decorators are like HOC in react

Great simple explanation!

new to programming. Know the basics... Made a discord bot in python and had to use some "decorators" for the first time. Didn't know what they were called until know or how they worked.

do this. do that.

What is the difference between the decorater and the wrapper. Or rather what is the use of the wrapper, doesn’t the decorator do it’s job?

Thanks 🙂 Decorators can "decorate" only other functions or other python elements too?

Can you show the input output caches?

why is the purpose of def wrapper (): func?

Like closures in JavaScript I suppose.

Funny how decorators are simply the implementation of the decorator pattern.

I like your vids but bro how do you "auto fill" the code? did u do it backwards and press ctrl z all the time? how else do you autofill the code in the exact right spots etc?

This is amazing, keep it up

AOP in spring. Simple here.

I am very very new to python and was wondering how you skip to the next line without executing the function.

Great

What is the relevance of wrapper?

Me right now on Day Zero (preemptively) the trying to learn Python and attempting to understand this video: @_@;;

I still didn't get it

yeah im not there yet :)

Is it possible to combine multiple decorators?

What IDE and theme is this? Looks great

Judging by the comments, this syntax seems like wizardry to many people. Decorator syntax (@decorator) simply takes the function you are decorating and returns a wrapped function with the same name: def cache(f): results = dict() def wrapper(n): key_missing = 'cache key not found' if (r := results.get(n, key_missing)) == key_missing: results[n] = f(n) else: print(f'using cached result {{{n}: {r}}}') return results[n] return wrapper # @cache # def plus1(n): # return n+1 def plus1(n): return n+1 plus1 = cache(plus1) print(plus1(2)) print(plus1(1)) print(plus1(0)) print(plus1(2)) # Output: # 3 # 2 # 1 # using cached result {2: 3} # 3 That's the power of decorators. You can see a more generalized variant of this caching/memoizing idea in functools.cache and even one that only keeps a limited number of values in functools.lru_cache.

Is this similar to wrapAsync func in javascript?

What If the function has arguments?

Poor man's monad

LOL, can I create a decorator as a class method and use it inside another class?

Whats the font name and theme name?

a great video as always, i have a suggestion that would probably take long normal videos, or multiple #short videos, but it would be appreciated by beginners like me... so long story short i wanted to make a snake game with pygame, but all tutorials contained "classes" and stuff related to classes, but i have never understood classes, as i found them very confusing plus not really useful in any way, as i have made multiple projects not really needing to use classes, and i didn't really want to just copy/paste the code from the tutorial, i wanted to actually understand what i was doing, what im saying is we would be very thankful if you could do tutorials explaining classes, what they are, how to use them, and most importantly why to use them, in a simple way for us beginners to comprehend, we'll be so grateful if you could fulfill my request, and from the bottom of my heart i thank you for all the effort you put into your content, keep up the great work (if you could, reply to my comment telling me if you would make or not to make the videos i've suggested)

What kind of program would need this?

what's the theme of your editor? i'm asking for the third time 😂

could this be used to create monads?

Python is about clever code over simple readable code.

Callback?

Bro, I swear I can't watch a python tip video without remembering that pythonistrash guy from instagram. Now everytime I watch any other python short or reel I keep thinking of "BIM BIM BAM BAM" 😰

So a decorator is basically a function for a function?

what is the theme you use for ur visual studio code?

How do all of these just instantly appear?

what is that color scheme

Which theme

what this is theme ?

why dont we just do my_decorator(do_this): is there any diffeerence to it

Software pls

why not just write "return lambda: func()"?

So middleware?

What is this vs code theme

i was gonna make fun of python but thats actually p cool

So...decorators are basically a function factory?

Why do you have to define wrapper?

Lmfao i didnt understand a single bit

So calling the functions below wont do anything? It will only run the decorator? Or even we put @my_decorator it is still necessary to call those two functions?

Hard to read I’ll get to this when I get to it

Why do you have to return the wrapper ?

Nice, so now let's try to explain difference between decorator and proxy 😂

whats your theme name?

So why not just do my_decorator(do_this()) as an argument