Python tricks: Using magic (dunder) functions to create list-like objects

(For more, visit pythontutorial... !) In this video I demonstrate how you can use magic functions, sometimes called dunder (double-underscore) functions, to support special list-like syntax in your own objects. Specifically, I will demonstrate __len__(), __contains__(), and __getitem__().

[@theawesomegamer123]

1:30 "Whenever we take a look at a member from the ASAP mob, that member goes solo, because as soon as a member gets a little bit of attention, he goes solo" I laughed so hard when he said this 😂😂

[@jsonhub4082]

thx for such infos , good work, BTW this is the third video YT that i've seen about dunder and it's the BEST ONE.

[@micahbeckman4442]

I've seen a lot of python tutorials - yours are the best.

You probably say that to all the Python KZbinrs ;-)

[@micahbeckman4442]

What other Python KZbinrs? :)

[@pilaramonkgogimoshebashebi2371]

8:00 "If A$AP Sebbie, thats me. Thats my A$AP mob name..." 😂...............😂 That deserves a double like. Good Tutorial.

[@debvdo]

Good video. I liked how you return a generator object from a call to __iter__(), using yield. It works as an iterator.

[@BigOlKnothead]

The pure depth of actually insightful and useful and unrepetitive conprehensively exhaustive full wealth of the correct information makes you the best code writing creator by huge margins. So many others give the most vagueried minimum of information that often leave the viewer at the end with more questions than the video provided s

[@ibekwevictor1158]

Thanks for the Tutorial ... I appreciate your work .... Bringing hip hop vibes in python 👍💪

[@andyd568]

Sebastiaan is the OG of programming. Great vids.

[@yt-1161]

@11:10 when you write return member in self._members Which function does the python use to check whether the member is "in" the list?

[@min2MAXdances]

this was a very helpful straightforward tutorial!

[@SebastianSanchez65]

great video in dunders!

[@UniBreakfast]

No __next__? Also this __iter__ gives members in reverse order. Is it supposed to do that?

+Михаил Нинин The __next__() function is only necessary when you implement iteration through a separate iterator class, rather than through a generator function as done here (in which case yield serves the same purpose). But you're right about the order: it would've been more elegant to do a pop (0)!

[@sheikhakbar2067]

Beautiful!

[@surajchopade6735]

Thanks for such amazing video

[@abhayagarwal5097]

Great work man,thks

[@marcelangulo510]

Excelente video

[@ramstein74]

Great vid Can you suggest a python book ?

Thanks! I generally recommend the Python track on CodeAcademy for beginners (www.codecademy.com/learn/learn-python). Or, if you prefer a book format, A Byte of Python (python.swaroopch.com/). For more advanced Pythonistas, I think watching KZbin tutorials about specific issues is a good way to learn as well.

[@mainsequence1055]

"Automate the Boring Stuff in Python" is also a great book.

[@SS-pz8md]

@ thanks

[@TechieGuy82]

Sublime!

[@experimentalhypothesis1137]

interesting video

[@dontbetoxic4387]

How are ur sunglasses called?? Pls answer

My sunglasses prefer to remain anonymous ;-)

[@dontbetoxic4387]

@ :(

[@blenderremastered9959]

programmer elevated to gagster still Sebastiaan Mathôt.

[@arryhere]

single _ is protected , double __ is private

[@dillip4572]

You rock :)

[@veziop]

goes solo, hilarious

[@PaulaJBean]

een ___getitem___ die als side-effect het muteren van de datastructuur heeft? Daar gaan je gebruikers van opkijken. Je schendt daarmee het *principle of least astonishment* , en.wikipedia.org/wiki/Principle_of_least_astonishment

+Paula J. Bean Dat is een goed punt.

[@jamil4322]

but the x was false sir