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
Пікірлер: 78
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
Жыл бұрын
Very true, I often use lambdas in these situations to show that people can really implement their own custom functionality :)
So handy list aspects. Many thanks.
Sadly, this was really great. Concise, comprehensible, your voice friendly, warm and welcoming. Dig this vid a lot, might explore more.
@harmly2682
Жыл бұрын
why sadly bro
@kingoreo7050
11 ай бұрын
@@harmly2682they asked for tips at the end of the video, there are no extra tips he could add
Love your channel! Always interesting material, presented clearly and with good examples.
Great video!
Really love your content. Can you please do a video on time and space complexity with python examples?
@Indently
Жыл бұрын
I'll look into it!
@BAMBAMBAMBAMBAMval
Жыл бұрын
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
love ur vid. thanks
I am really thankful
awesome!
thank u for tutorial. greet from Indonesia 👍
❤❤❤❤❤❤ Thanks a lot!
wow....thank you so much....
nice list!
Very nice superb❤❤❤
Great 👍
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
sir that was amazing teaching thank u
@brd-ch5108
3 ай бұрын
Basiji?
7:11 where i left of coding thx for the video its Awesome sauce
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.
Very nice class I am from india
Which editor are you using? It looks very clean.
@Indently
Жыл бұрын
PyCharm
You super man❤
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
Жыл бұрын
Slicing creates a new list, while most of these methods are performed on the list in place
can you explain that you're assigning variable is different way
Great.
what's the difference between list.clear() and list = []
@massy-3961
Жыл бұрын
Clear is better memory wise
@masterous
Жыл бұрын
@@massy-3961 thanks
@lemmenmin7676
Жыл бұрын
i think list.clear() means that list = null; // work garbage collector, clean memory list = [] means that list = new list(); // new pointer in memory
@lawrencedoliveiro9104
Жыл бұрын
Actually “l.clear()” would be more equivalent to “l[:] = []”
@oerthling
3 ай бұрын
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.
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
Жыл бұрын
I recommend breaking that problem down into smaller problems. It's very unlikely I will make a video so specific to that problem.
Wait why is the filename still 'pydec' today is January which means it needs to be 'pyjan'
@Indently
Жыл бұрын
It's going to get really confusing for people following the file name dates! Because that's when I created those projects ;)
@realcontentgamer
Жыл бұрын
@@Indently oh alright
@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
3 ай бұрын
Correct. Python list sorting methods are stable, meaning that equal keys preserve the original order. The video was incorrect on that point.
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
Жыл бұрын
its just a little more memory efficient than list = [ ]
@cerealport2726
Жыл бұрын
@@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
Жыл бұрын
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
Жыл бұрын
@@TheMongole24 cool, thanks for the explanation!
Is extend() like concatenation
Helicopter Helicopter 😂
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
please hepl : print("Sartirovka") print() s=int(input()) a=[] for i in range (s): a.append() a.sort() print(a) what' wrong?
@azizbekbarotboyev8015
7 ай бұрын
help*
@saaroopsai1063
2 ай бұрын
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.
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
7 ай бұрын
It's just type hinting, it isn't required, lists are the same
Helicopeeer
Mostly you ise dunder in class
HI, why did you put "people: list[str]" wouldn't "people = [ "Mario", "Elon", "Trump" ]" do the job?
@Indently
5 ай бұрын
Because we are adults now, and Python offers beautiful tools to simulate static type checking :)
TypeError: 'type' object is not subscriptable
@Indently
Жыл бұрын
I think you meant to paste that on Google search.
@lemmenmin7676
Жыл бұрын
@@Indently No. This does not work on all compilers.
@Indently
Жыл бұрын
Please explain what you mean.
@chaddaifouche536
Жыл бұрын
@@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
Жыл бұрын
@@lemmenmin7676 Python doesn't have any compilers. Python is interpreted language.
you lost me at about the 10th elons
Array, not list.
@Indently
Жыл бұрын
Please be more specific about what you're trying to explain.
@chaddaifouche536
Жыл бұрын
@@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
Жыл бұрын
@@chaddaifouche536 Your point being?
@chaddaifouche536
Жыл бұрын
@@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
Жыл бұрын
Python has an entirely separate “array” module. And then there are NumPy arrays.
You can get rid of the lambda function in the sort method. people.sort(key=len) It works too.