Magic Methods & Dunder - Advanced Python Tutorial #1

We are starting out with a new tutorial series on advanced Python programming. In this first video we talk about magic methods or dunder.

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[turgutbababalm]

finally an "advance" series that actually thought me something new!

[MuffineousMuffin]

This IDE color scheme is the equivalent of having a drip in fashion world.

[mrmoinn]

Suggestion for this series: I'd love to see you cover unpacking in Python. There's a lot more to it than people realize at first, especially the use of _ and *, so you could make a small video on that.

Love your content, btw :)

[ayaanp]

LETS GOOO, A PYTHON ADVANCED SERIES. Thanks a lot :)

[AndrewMerts]

There's two mistakes worth mentioning here. When discussing __len__() you suggested that the correct way to do it for your Vector example would be Math.sqrt() to get the magnitude of the vector. __len__ is not just any arbitrary "length" it's supposed to be used to identify the items in a collection. It needs to return an int, not a float and you shouldn't be implementing dunder methods for some alternative use, it needs to keep the intended meaning. The other mistake was in __repr__(). There's __repr__ and __str__ and the reason why there's two of them for a very similar thing is because __repr__ isn't just some arbitrary string, it's supposed to be valid Python. As an example, the following should be true for a class where the __repr__ and __eq__ methods are properly implemented: "obj == eval(repr(obj))"

It's more or less serializing the object. You could have __str__ implemented exactly as you demonstrated, if __str__ is missing then converting to a string will fall back to using __repr__.

[robinferizi]

Very nice, You posted this while I was on my lunch break, perfect

[giacomocesareo]

WOW! You are so clean!
Please keep up with this amazing series!

[collinchau]

started from the beginner series to here thank you for making these videos!

[daguttt]

This is what I needed, Thank you so much for this tutorial series!

[anthony_issa]

That's what I've been waiting for, let's go !

[asdf]

That is really cool! Great video thank you! Can't wait to try these in my coding. Looking forward to watching the rest of the video series

[paduraruovidiu]

this is gold! thank you fro the content, extremely helpful and great presentation skills

[shb]

You made my day! That was the best simplest way to train these Dunders

[borislabut]

Text editor colors changed! That's an advanced level!

[mehdimojaradi]

Very thanks for all your efforts and informative courses. I am learning a lot from your great contents.

[ViralKiller]

So __call__ only works in the bash console? I couldn't get it to show anything in IDLE

[pawegorka]

__repr__ method is for programmers, so should be return "Vector(60, 80)".

[lucario]

Thanks for making the video on this topic

[Ken-Czyz]

Really looking forward to this series see you in the next vid 🧐

[jonastjepkema]

Excellent!! I'm looking forward seeing all these :)