ALL 11 LIST METHODS IN PYTHON EXPLAINED

Every list method in Python explained in a single video! Did you know all of them? Let me know in the comment section :)
Learn more about copy(): • Your Lists Are Being C...
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00:00 Intro
00:52 append()
01:14 clear()
01:26 copy()
02:48 count()
03:33 extend()
04:17 index()
04:55 insert()
06:05 pop()
06:49 remove()
07:14 reverse()
07:31 sort()
09:02 Conclusion

[@loverboykimi]

So handy list aspects. Many thanks.

[@dm_5000]

Love the channel. FYI, the key in the .sort() method doesn't have to be a lambda function. Any function will work including built-ins and functions you write yourself. Both of your examples would have worked with people.sort(key=str.lower) and people.sort(key=len)

[@Indently]

Very true, I often use lambdas in these situations to show that people can really implement their own custom functionality :)

[@danielzima9414]

Sadly, this was really great. Concise, comprehensible, your voice friendly, warm and welcoming. Dig this vid a lot, might explore more.

[@harmly2682]

why sadly bro

[@kingoreo7050]

@@harmly2682they asked for tips at the end of the video, there are no extra tips he could add

[@jimalix6270]

Love your channel! Always interesting material, presented clearly and with good examples.

[@TheKimphoe]

Great video!

[@hilkiahlavinier]

Really love your content. Can you please do a video on time and space complexity with python examples?

[@Indently]

I'll look into it!

[@BAMBAMBAMBAMBAMval]

O(1) is 1 action O(log(n)) is wierd(search up "harvard cs50 phonebook" for example) O(n) is as many actions as iterables O(n²) is garbo Example you want to count from 0 to 10: O(1) = [10] O(log(n)) = [1, 2, 4, 8](10 wouldnt be part of the logarithm) O(n) = [1,2,3,4,5,6,7,8,9,10] O(n²) = [[1,2,3,4,5,6,7,8,9,10]1,[1,2,3,4,5,6,7,8,9,10]2,[1,2,3,4,5,6,7,8,9,10]3,[1,2,3,4,5,6,7,8,9,10]4] ect up to 10

[@asharsumari9313]

love ur vid. thanks

[@KRITIPANDIT-dc7yr]

I am really thankful

[@girishkrishnayadav6693]

Very nice superb❤❤❤

[@cerealport2726]

nice list!

[@muheka20]

thank u for tutorial. greet from Indonesia 👍

[@catherinemukunga1787]

wow....thank you so much....

[@Alextv-tz7tw]

awesome!

[@dky_code]

Great 👍

[@jaquesadv]

❤❤❤❤❤❤ Thanks a lot!

[@julyp9990]

sir that was amazing teaching thank u

[@brd-ch5108]

Basiji?

[@JustMastermind]

Which editor are you using? It looks very clean.

[@Indently]

PyCharm

[@prudhvirajbandi5235]

You super man❤

[@RobinZuFALL]

What are the advantages/ disadvantages of using list slicing instead of those list methods? I tend to use slicing allot as it is easier to remember for me.

[@chrisvinciguerra4128]

Slicing creates a new list, while most of these methods are performed on the list in place

[@KonradTamas]

Your content and you are Great !! What is this notation that you use tho -------> people: list[str] = [..., ....] Im new to this so, this is the first place I saw it and looks clean and informative ! Although if you add some intst there, it wont give you an error, so I dont get the [str] part, its just a hint to increase readability ?? Thx in advance.

[@michellegresser7389]

Wie kann ich Wörter nach dem letzten Buchstaben Sortieren? Ich habe versucht wie immer eine Key Lambda usw. Zu setzten....und am Ende ein -1 gesetzt. Aber es es geht nicht

[@surajprajapati3398]

Very nice class I am from india

[@-SHEESH-YIKES-]

7:11 where i left of coding thx for the video its Awesome sauce

[@kvelez]

Great.

[@VinothKumar-ut4rj]

can you explain that you're assigning variable is different way

[@faaiidodiineed6924]

Hi, I hope you are fine. Thank you for your helpful and well detailed videos. I have one request: Can you provide us a video that explains how to convert tkinter multiple files with mysql database into .exe file. Please help.

[@Indently]

I recommend breaking that problem down into smaller problems. It's very unlikely I will make a video so specific to that problem.

[@realcontentgamer]

Wait why is the filename still 'pydec' today is January which means it needs to be 'pyjan'

[@Indently]

It's going to get really confusing for people following the file name dates! Because that's when I created those projects ;)

[@realcontentgamer]

@@Indently oh alright

[@masterous]

what's the difference between list.clear() and list = []

[@massy-3961]

Clear is better memory wise

[@masterous]

@@massy-3961 thanks

[@lemmenmin7676]

i think list.clear() means that list = null; // work garbage collector, clean memory list = [] means that list = new list(); // new pointer in memory

[@lawrencedoliveiro9104]

Actually “l.clear()” would be more equivalent to “l[:] = []”

[@oerthling]

clear empties your existing list object, while = [] creates a new empty list object. If you don't care about the particular object reference value, the differences are negligible in practice.

[@user-zu9zc4rl4e]

@8:37 sorting by people.sort(len(name)) why is 'Mario' , 'trump' , 'Luigi' the order as it is not alphabetical for length = 5? It seems to maintain original order for strings of length 5.

[@MAlanThomasII]

Correct. Python list sorting methods are stable, meaning that equal keys preserve the original order. The video was incorrect on that point.

[@nakamuramizu..584]

Is extend() like concatenation

[@cerealport2726]

Just wondering what sort of use cases there are for list.clear()? (I've never used it, but that doesn't mean very much!!)

[@deei5130]

its just a little more memory efficient than list = [ ]

[@cerealport2726]

@@deei5130 interesting, thanks, I might see what could do for me, I have cases where I cannot avoid lists with 4-5 million elements. Stupid proprietary data environment...

[@TheMongole24]

I use lists in a game to create objects from an enemy class. The game runs on a loop and when the player dies, a new game is started and obviously the lists must be reset so that the new game is not already filled with enemies. I use list.clear() for that.

[@cerealport2726]

@@TheMongole24 cool, thanks for the explanation!

[@Jqts369]

Wait….is this supposed to be for beginners cause i have never use people: and list[str] to create a list…..how can i learn methods when i have to stop and go learn this? Idk why this is done when teaching new subjects, or diving into a beginner subject like lists

[@azizbekbarotboyev8015]

please hepl : print("Sartirovka") print() s=int(input()) a=[] for i in range (s): a.append() a.sort() print(a) what' wrong?

[@azizbekbarotboyev8015]

help*

[@saaroopsai1063]

a.append(argument), you are missing the argument that's to be added to the list, in your case you are not appending anython to the list.

[@atharva7616]

Helicopter Helicopter 😂

[@xuzm]

Can someone explain the way the code is written? Usually i do Create_list = [1,2,3,4] But his way is Create_list: list[str] = [1,2,3,4] Could someone explain this type of style?

[@artorias3904]

It's just type hinting, it isn't required, lists are the same

[@drugho92]

Helicopeeer

[@mtalhakhalid1679]

Mostly you ise dunder in class

[@IsaacGunananth-st7wz]

HI, why did you put "people: list[str]" wouldn't "people = [ "Mario", "Elon", "Trump" ]" do the job?

[@Indently]

Because we are adults now, and Python offers beautiful tools to simulate static type checking :)

[@craigslistbuslistingsofnor6494]

you lost me at about the 10th elons

[@lemmenmin7676]

TypeError: 'type' object is not subscriptable

[@Indently]

I think you meant to paste that on Google search.

[@lemmenmin7676]

@@Indently No. This does not work on all compilers.

[@Indently]

Please explain what you mean.

[@chaddaifouche536]

@@Indently He tried your code in an older version of Python and had this error because subscriptable types (like list[str]) have only been added since Python 3.9 (and you can get them with `from __future__ import annotations` if you have Python 3.7 or 3.8). He could use typing.List instead of list or just not write the annotations.

[@callbettersaul]

@@lemmenmin7676 Python doesn't have any compilers. Python is interpreted language.

[@itsmaxim01]

Array, not list.

[@Indently]

Please be more specific about what you're trying to explain.

[@chaddaifouche536]

@@Indently The class *list* in Python implements what's called arrays in almost every other language and data structures books (more precisely dynamic arrays, C++ call them vectors but that's an horrible choice all of its own). If you're teaching programming with Python, it's a constant pain to every so often catch yourself referring to lists when you meant arrays just because the chosen language didn't use the standard name. Not really important in most other contexts (a rose by any other name…).

[@callbettersaul]

@@chaddaifouche536 Your point being?

[@chaddaifouche536]

@@callbettersaul I'm just explaining what maxim was referring to. All in all this video is exploring the list class in Python so I don't think this distinction is very important here but some people more accustomed to other languages do find the name irritating.

[@lawrencedoliveiro9104]

Python has an entirely separate “array” module. And then there are NumPy arrays.

[@vladimirtsyapka3277]

You can get rid of the lambda function in the sort method. people.sort(key=len) It works too.