Class Methods, Static Methods, & Instance Methods EXPLAINED in Python 

I have been learning so much from your videos! Your presentation of the material is superb. Keep up the great work!

the @staticmethod is NOT optional. Simply removing the self keyword does NOT make it a static method, and will have weird results.

I think you would have been better served by introducing the idea of scope in this discussion. Also, I always think the best way to introduce the topic of the class method is by introducing a class variable like an instance counter that increments/decrements when a new instance of the class is created. Also, it wouldn’t hurt to put print statements in your constructors just to illustrate when they are called and how they affect class vars.

You could have added that... class methods can refer to and modify class variables. These variables are shared between the class and all instances of the class. Also, static methods... you showed can be used relative to the class - as in classname.static_method(). But, you can also use them relative to an instance of the class - as in federico.age_from_year().

It took ages for me to understand this. I never came across with such clear explanation. Thank you. Thank you so much.

Please don't stop making these. These videos are very useful and really enjoyable to watch!

everytime I watch one of your videos they are always explained really well, thanks I appreciate it a lot

Great content again. Really helpful for getting to grips with OOP in python

Thank you so much for clearly explaining the difference between @classmethod and @staticmethod with an example. This really helped me to understand the usage of @classmethod.

Is that PyCharm? Because mine looks different Edit: Its in the settings its called New UI

First of all I really appreciate your content. You are doing a great job. Regarding class methods and using it for constructing class instances, I'd rather use just static methods. Class methods are usually used for meta programing which is a way more advanced topic (which you rarely actually use)

Thanks you made it really clear about the class method

Great stuff. Hardly any tutorial explains these.

Thank you so much, finally I got the concept!

Awesome video! Thank you. I have never thought of it but is this the only way to override a constructor in python?

Спасибо большое, стало гораздо понятнее! Thanks a lot, now i understand it much more fully. It really helpful!

This clears up these concepts!

Interessantissimo video Federico, sono principiante nel mondo della programmazione, quindi i tuoi video hanno reso più facile la comprensione di molti concetti, continua così!

Your thumbnail stands out so much, keep up your style man!

awesomely explained. well done

very clear, easy to understand

I hope not to be wrong but there is a small error You said the addition of @staticmethod was a choice. If you remove self tho, it's not a choice anymore This is because python automatically sends the self argument when the function is called (in that case self will end up between the numbers) so the decorator is needed I'm not trying to be rude and I'm not sure I am right, so correct me if I am not

Thumbs up! great video thanks

@4:08, I don't think so it will be perfectly fine unless we give a static method decorator for that.

What font are you using? I like that '->' looks like an arrow without a break

Great explanation!!

if i have a python class of 1000 dogs and it all works as a class should, how do i search the dog class using a 'string' for a particular dog- say 'beagle' - I want to use a string because I am iterating through a large python list(which is strings) I can't figure out how to do it?

great video! I'm new to coding and have just begun learning Python. I'm currently using VSCode. Which editor are you using? It looks clean with only your code and the terminal visible.

Thanks, that's a nice guide! I wonder what editor you are using in the video, with what extensions?

Thanks. I noticed that you keep adding data types in variables as well as method return...is that really needed?

Do static methods always have to be inside a class?

Thankyou so much sir

Great explanation. Thank you ☺

Good

good keep it up

Hey listen I want a brief lecture on class and class function

Finally, the issue I come across I believe

I like ur performance :) # thumb up

Good video

can we access static method by using object reference?

sublime

I use classmethods all the time, esp. as constructor helpers...since I never do work in __init__, that method is for setting instance attributes, and that is it. If I need to, say make the instance from a file...I am not reading a file in init, rather: @classmethod def fromfile(cls, filename): with open(filename, 'r') as fsrc: return cls(*some_function(fsrc.readlines()) and I get a new instance with the file data loaded. For static methods, say I have a class whose attributes are different real time series, well if I want an fft or something: @staticmethod def rfft(x_i): return np.fft.rfff(x_i) the reason I put it in class is that I want the object to be able to do everything that needs to be done to it to be part of the interface. I don't want a user looking for np.ftt.rftt and doing it themselves, or making the mistake of using a full fft for complex inputs. A class should contain ALL the functions you would want to use on it,,,even if they don't depend on instance/class attributes.

thank u.. but i wanna know the name of this ide that ur using

One tiny unrelated fix - Your "age_from_year" function actually needs the exact date of birth, to determine your age, so it can check whether current date is before or after your birthday. If you only enter 1997, and now we are in 2023, running your code today returns an age of 26, but if your birthday is in August, and today we're in February, you are still 25.

Actually WTF is the answer! OOP in Python is a mess!

Note: see that __main part

Nide

Wow what a good presentation. My appreciation!