Python Tutorials - List Sorting | sort method

In this Python programming video tutorial we will learn how to sort list using sort method in detail.
sort is a built in method which will modify original list and arrange elements in ascending or descending order.
Syntax of sort method is:
list_name.sort(key = None , reverse = false)
Here in this tutorial we will discuss about key function and reverse in detail with example.
For more free tutorials on computer programming
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[@babyfox205]

great explanation of the 'key' for sorting, your explanation was the best of all 5-6 that I've seen today and were unable to really understand why we can put any function into the key. Thank you!

[@fatinishraqprapya3139]

This is one of the best helpful video for the beginners who are learning Python.

[@angelomichel6074]

this information is so satisfying !!!Thank you so much Amuls Academy

[@AmulsAcademy]

Glad you liked it!

[@sushilkumar-ef7gh]

I have to say that you have made coding more interesting then ever for me ....Thanks a lot

[@AmulsAcademy]

Welcome:)

[@alimujtaba1208]

your teaching method is very best i satisfier

[@sairamnagarajan8289]

Simplistic explanation. Thanks for your effort.

[@AmulsAcademy]

My Pleasure :)

[@zhimwar1367]

Thank you so much for sharing this. U have solved one big question in head for long time.

[@AmulsAcademy]

Pleasure :) And that is ?

[@Suhail_202k]

Really one of the best videos on KZbin hatsoff ,great explanation mam thanks for your efforts,i hope you will do more videos ❤

[@qzorn4440]

this is sooo relaxing python information. I listen to your video on my coffee break to relax. S*) thanks

[@AmulsAcademy]

Welcome :)

[@denizyarar4781]

thank you i'm a year 11 student writing code for an NEA and this vid is a lifesaver

[@AmulsAcademy]

Thank you :)

[@gani3676]

Hi Amul, Will be waiting for continuous video. Thanks

[@AmulsAcademy]

Thank you:)

[@HarshRaj-bm9eg]

thank you very much for making such a very beautiful video based on python

[@AmulsAcademy]

Thank you:) Keep Learning

[@mohsharma3937]

THANK YOU SO MUCH MA'AM YOU CLEARED MY DOUBT

[@AmulsAcademy]

It's my pleasure : )

[@HarshRaj-bm9eg]

mam i am so so so thankful to u. you cannot even imagine what you are to me

[@AmulsAcademy]

Welcome:)

[@trishulsingh2907]

Your channel is Underrated . Keep going one day you will reach 10k Subscribers .

[@vishnubhardwaj2595]

your voice is really very soothing and video is very helpful.

[@AmulsAcademy]

Thank you 😊

[@sangeethaagoudar2175]

This is one of the best video of knowing exactly how the nested list worked with sort .Thank you so much 😊

[@steveaman5126]

nice in-depth knowledge

[@AmulsAcademy]

Thank you 😊

[@AkashSingha]

Thank you very Much mam it helps me a lot.

[@AmulsAcademy]

Pleasure :)

[@nagapurisandeep2289]

Your explanation is good mam.

[@AmulsAcademy]

Thank you 😊

[@abdullakhan4632]

very good. i like your explanation. grate 👍👍👍

[@AmulsAcademy]

Thanks! 😃

[@saumyachaudhary3983]

very good explanation

[@AmulsAcademy]

Thank you :)

[@belalibrahim3812]

Its soo helpful 😊

[@AmulsAcademy]

Thank you :)

[@josephdzn9868]

good explanation. 2nd example can also be done by: list2.sort(key=lambda x: x[1])

[@ilzz9856]

Hi bro can u explain working of that expression?

[@josephdzn9868]

I am not an expert here (still learning) but you can think of lambda as a throw away function. No need to define a separate function but you can encapsulate expressions (and arguments) using lambda - if that makes sense. Amulya's channel clearly explains the Lamdba function, check that out.

[@mananbhatia9242]

how we can do to descending order using this function?

[@allenjr4978]

The best ever

[@AmulsAcademy]

Thank you 😊

[@spark561]

This is a great video and more useful for us

[@AmulsAcademy]

Thank you :)

[@spark561]

@@AmulsAcademy well come

[@gouthamrajesh2745]

Helped me in python project

[@AmulsAcademy]

Glad to hear that :)

[@subrinalazad3215]

Thank you

[@fun-ih5sc]

9:18 . * When we call the userdefine function we are not passing any argument as but when you define the function it is taking one argument .How is it working. * key=SortBySec, here how the argument in function defination "Element" is pointing toward every index of a list Thanks & Regards Aditya

[@AmulsAcademy]

you should mention function name as key, no need to mention arguments. when you define key function it should contain only one parameter, if it contains more we will get error. when we use sort function it will take the first value of list and compare it with second element and based on the comparison it will sort the list. [when key is not mentioned]. when key is mentioned then instead of comparing first element with second, it will pass that first element to that function, next second element to that function later based on that function result it will sort the list. :)

[@miftahshidqirabbani6489]

Thanks dude. You helped me to get out of this :)

[@AmulsAcademy]

Glad to hear that :)

[@patelhardik2505]

thank you.

[@AmulsAcademy]

Welcome :)

[@itachi99887]

Do you have any video on how to sort tuple inside list . For eg [(as,1),(cs,2),(bs,6)] how to sort the key value in ascending order. If you have please give the link . Thank you

[@miraatif9945]

Thanks mam

[@ilzz9856]

In the video you done ascending order through first element and by second element . How can we make descending order in that list with second elements?

[@AmulsAcademy]

take reverse=True :)

[@deepuvarma9459]

good one

[@AmulsAcademy]

Thank you:)

[@1mol831]

Thanks, though I still want to learn how I could sort by frequency. Without using a while loop with a dictionary..

[@abhishekjaiswal3821]

thnx

[@vignesh3851]

Your voice is melted me 🥶

[@gauravpatil7977]

how come index of second element is one in nested list? it should be element[0][1], shouldn't it ?

[@amirsharifi8837]

wow!

[@HarshRaj-bm9eg]

mam one more thing i want to say to you is that can you tell me that from where can i get questions based on python for beginners as i am new to program. this is the first time i am learning any language and this is the python

[@AmulsAcademy]

google it, you can start with basic programs:)

[@sigdyxc2658]

I like your voice

[@debojitmandal8670]

Mam can you sort length of a string and pritn the longest word

[@AmulsAcademy]

We can try :)

[@krishk4870]

hey i got doubt pls clear it... that in 7:55 how the fucn (sortbysec) is works its just return the parameter(element's) first indexing position,that how could sort the list regards with sec value of sublist of list2 ????????? pls xplain the key fuction def sortbysec() plsssssssss amul !!!!!!!!!!

[@AmulsAcademy]

key function serves as a key for the sort comparison, it won't sort the list. "key" function transforms each element before comparison, next based on that transformed value sort() will sort the list. :)

[@sanketh768]

Thanks for the video. But had 1 doubt which is still unclear def sortbysec(element):# accepts list as a parameter or argument return element[1] list=[(1,16),(1,2),(2,5)] list.sort(key=sortbysec)# my doubt is sort by sec is not taking any parameter as per the signature of this function. # we are not passing any argument to the sortbysec function i mean list2=sortbysec(list) # passing list as arguments Would greatly appreciate your help

[@AmulsAcademy]

No need to pass any parameter to key function :) You are calling list.sort(key) so whatever you will do with sort() will apply on list. :)

[@sanketh768]

@@AmulsAcademy Thank you for the response

[@bhagwatimehra4738]

How to display a list in ascending and descending order using a str value

[@Sandeep0917]

can u solve this by using for loop

[@AmulsAcademy]

Give me the program, I will try :)

[@mominumar3388]

How can we sort a list containing numbers as well as characters??

[@AmulsAcademy]

In python 3 it will give error But you can separately sort characters and numbers then you can append it to list. c = ['s', 'a',2 , 'j', 9, 'e', 11, 't', 'k', 12, 'q'] c = sorted([i for i in c if not str(i).isdigit()]) + sorted([i for i in c if str(i).isdigit()]) print(c) :)

[@Aivin]

helpful helpful helpful did i forget to say helpful?

[@AmulsAcademy]

Thank you :)

[@charancharan2417]

Hi mam Will you provide online training or classroom training for python....???? May I know if you are doing training

[@AmulsAcademy]

No sorry:)

[@nadeeshandilusha1934]

🖤🖤

[@AmulsAcademy]

😊

[@tanmoysardar3908]

maam i am Tanmoy have been waiting for u since last week plz maam its very urgent i want to study that python graphics part ...i have subscribed your channel and also downloaded all of your video ..please maam make that video

[@AmulsAcademy]

Hi Sure. But i need some time:)

[@tanmoysardar3908]

maam kya aap bata sakti how much you need maam isliye bol raha hu ki ek project submit karna tha thoda help ho jata

[@AmulsAcademy]

Project submit kab karna hai?? i need minimum 2 weeks. :)

[@tanmoysardar3908]

4th of July maam

[@AmulsAcademy]

Ohhh...I guess i can't upload so early:)

[@charancharan2417]

Hi Please upload Django course for freshers

[@AmulsAcademy]

For now i can't. But will do tutorials on django:)

[@swethamk5925]

How to get a list input.. Like this [1,2,3,4] as an input and print it like [4,3,2,1]

[@AmulsAcademy]

You want to reverse the list or want to sort?

[@swethamk5925]

I want to reverse the list

[@AmulsAcademy]

list1.sort(reverse=True)

[@madras.mp424]

Where the without using built in function ?

[@mathemediaworld9711]

Without using any build dunction

[@AmulsAcademy]

You can use selection sort or other sorting algorithms for that :)

[@abhishekpathak9454]

Hllw mam my question is that how to get sum of sub list..?? Tell me plzz😓

[@Aivin]

sum(list[sublist]) i think

[@Sanjaykumar-xr8rz]

without function use kiye kro list ko assending order main

[@AmulsAcademy]

You mean to say without built_in functions ?

[@tanaymajumder9220]

Amuls Academy please guide me to do without using sort function

[@maltesh105joshi]

I have xml and i can sort within first child only. but it will through an error when the line have commented in my 1st child. it works fine if there is NO comments. can you help me here CODE root = tree.getroot() for c in root: c[:] = sorted(c, key=lambda child: (child.tag,child.get('name'))) xmlstr = ET.tostring(root, encoding="utf-8", method="xml") print(xmlstr.decode("utf-8")) ERROR c[:] = sorted(c, key=lambda child: (child.tag,child.get('name'))) TypeError: '

[@mathemediaworld9711]

Do it

[@Ganga_BE]

Sis. Input=1234, output=10203040 I want this program sis

[@sensei_kail1109]

nice india

[@AmulsAcademy]

Thank you :)

[@TheNikhilify]

Virginal list

[@sahals8564]

Thank you

[@AmulsAcademy]

You're welcome :)