Python Tutorial: Sets - Set Methods and Operations to Solve Common Problems

[@coreyms]

A couple of times in the video I said "set function" when I really should have said "set class". FYI

[@vinodkumar-zf6vk]

Thats Totally Okay . your video is awesome

[@jasonjluo]

can you please do an oauth2 tutorial?

[@timoissakainen5157]

7:03 7:05 ​@jasonjl 8:00 😅😊😊 9:26 😅uo

[@deojeetsarkar2006]

I failed to search for a solution online to a question, it was nowhere but here. He is the master-answer to Python.

[@helantopia]

Thank you so much for making these videos Corey! I discovered your videos after failing my exam on Python and with just a week of watching your videos I passed the retake exam with a 1,7 !!! 😍 I honestly can't thank you enough, I also really enjoy programming now :)

[@coreyms]

That's awesome! Congrats on your test scores! Glad to hear you're finding it more enjoyable now. It definitely takes time, but if you stick with it then it becomes very fulfilling. Best of luck!

[@randomthingz9631]

dumb shit

[@TaimTeravel]

​@@coreyms This video might be old but it's still gold. Thank you Corey. You made learning easier.

[@sajnashetty8970]

Don't get sleep while watching Corey Videos :)I love his Voice.

[@alexmomotov792]

Yaaay! First video in a while! Hope you keep making them Corey, you are the best Python teacher ever.

[@coreyms]

Thanks. I’m going to try to get on a schedule of releasing almost every week, but it is difficult when also working on larger courses. But I will try. We’ll see how it goes.

[@aloksingh422]

You are super sir ..🙏🏻 keep going

[@jamesbrown6591]

Your python channel is the best i've found for self-learning, thank you!

[@DongWonHanDWONH]

I never have wrote any comment in KZbin video until now, but I got to say your videos are really awesome! Great help to me. Thank you!!

[@coreyms]

Thanks!

[@brotherlui5956]

Wasn't interested in sets so far but now i know how to handle them

[@deviwadala]

You are straight from heaven , free lessons and so informative , thank you !!!!

[@Chris_87BC]

Great presentation, Corey! I recently used set(a1) - set(a2) to find claims in set a1 not in set a2 :) I am starting to like sets as the calculation was done super-fast. List comparison was very slow

[@opalprestonshirley1700]

Another great video. I not an expert but I am learning from your vids. Thanks.

[@Pulsar77]

An important caveat is that sets don't preserve order. So the elements of newlist = list(set(oldlist)) can end up in a different order than in oldlist. If you want to remove duplicates from a list while preserving order, use an OrderedDict: newlist = list(OrderedDict.fromkeys(oldlist).keys()) In Python 3.6 or later, you can simply use dict: newlist = list(dict.fromkeys(oldlist).keys())

[@Ram-bt6yt]

Thank you very much! I was waiting for the last 1 min. Time complexity part! Sets are really powerful!

[@utkarshgautam1940]

ohh my god ,man i never seen anyone who teaches soo good,this guy here is awesome,im from india watching and learning from ur nice stufff man,u totally nailed it

[@Arrowtake]

Thank you Corey for your great videos. You have made so many exellent videos that are such a treasure for learning python.

[@xainch2360]

Best instructor ever!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! :)

[@javiers2133]

You're the best, the day I can make some money scripting, no doubt I'm going to pay you!!!!

[@soumyazyx]

Hello. Request you to prepare a python tutorial on "co-routines". That will be great in clearing some air around the otherwise confusing topic.

[@DarkToLight88_]

Your channel will help me pass my class. Thank you Sir!

[@fahimahmed3732]

such an underrated channel

[@Suwarrr]

You're the best,Corey Shafer!Awesome video!

[@adesuwabeckyporter3640]

I love your collection of books in your wishlist and your clear interest in exploring the conscious mind. I imagine it'd be so fun to go deep with you on the topic, exploring our thoughts both in "conscious" and "altered" state, documenting our perception of both states. lol.. yes I could have said that in fewer words but.. lol.. recruiter lurkers happen.. lol

[@noobinvestor3180]

Hi Corey..love all your videos...No one better imo...Maybe you can add also why it takes only O(1) for a set and why we should use set while searching if order of the items is not an issue --- My personal suggestion

[@coreyms]

I thought about adding more details but didn't want to make it too confusing. I probably should've provided additional material for those who are interested though. Here is further reading on how sets are implemented and why they are accessed in constant time... stackoverflow.com/questions/3949310/how-is-set-implemented

[@willofirony]

At the risk of being pedantic, isn't the search operation of a random list O(n/2)? One ceases to search after finding. If the list is sorted, searching would be O(log n) worst case when using a Binary Search..

[@noobinvestor3180]

Hi Michael, searching a element at either end of the list will give O(1) time complexity, whereas for elements within the list will have O(n) time, by using binary search in a sorted list, yes the search time will be O(logn)

[@jyothi26rab]

Thank you sir ur class was very clear and easy to understand, honestly thank u for making this vedio god bless

[@anorderedhole2197]

This solved a problem in a major way. Thanks.

[@abhisheksharma-ib5vw]

You are the best among best...

[@soumyazyx]

Thank you for your time and effort. Keep spreading the knowledge.

[@nunya_bizness24]

Pretty sure I'm gonna give this man a shoutout when I graduate

[@BrendanMetcalfe]

The intersection stuff was interesting. Thanks!

[@mdsharukkabirsazib]

simple and best to understand thanks.

[@hubertcombomarketing2693]

Great Python Sets Tutorial. Thank You.

[@MUZIXABA]

Another great tutorial from Mr Schafer.

[@shazkingdom1702]

This is good for observing patterns... i 🤔 ..... best Channel!

[@aditipatil7377]

Awesome. To the point and neatly explained. Great job !

[@pavelivakin8177]

Thank you! Awesome work. You motivate me to refactor my «membership test» stuff :)

[@guilhermehx7159]

Your videos are very helpful Corey, thanks!

[@PaulSmith-zs5je]

Who learnt something new? Great video

[@thebuggser2752]

Another great video! Might want to mention set equality.

[@matanerez8221]

Great video! love the simple examples and the detailed explanations. Well Done!

[@DebojitBhadra]

As always your tutorials are best

[@nomanabid7113]

16:13 shame on those two for not having awesome job or staying in shape xDDDDD

[@borninthedark7915]

I lol'd.

[@1polyron1]

@@borninthedark7915 I combusted

[@mohammadakhtar9792]

As always great video Corey!

[@victornikolov537]

I love to watch your videos, Corey. Keep going! You're the best I know. Pyramid stuff soon? :)

[@MrGamit1209]

Very good video. Thanks

[@narasimharajuballapura1]

just watched this video and subscribed : )

[@nikhileshsaggere]

Excellent tutorial

[@thattoofunny]

You're the best... Keep it coming....

[@ahmedjumaah9727]

Thanks for the good content Corey, helping a lot. Would be very helpful to prepare some videos about common algorithms for coding interview questions.

[@Happymoon789]

Thanks, a clear instruction on set👍

[@rudela9900]

Would you be so kind as to go over the very basics of neural networks, using very basic number sequences and involving nothing more than numpy, if necessary? Thanks a lot for a great job.

[@thengakola6217]

I didnt know this duplicating method......thanks

[@abhisheksharma-ib5vw]

Ultimate ....keep up the good work

[@dishydez]

This was great! Thanks!

[@henryyao4860]

Thank you!

[@trava4156]

This is awesome! Thank you

[@orkhanahmadov9963]

very informative video thank you so much

[@gianfrancomirto8765]

Perfect Video!!! Just wondering is there any videos you know that look at the underlying code of the methods of add add,discard and such?? Thank you

[@ivanniku2204]

Really usefull bro thanks

[@frankliva7438]

thanks so much buddy!!! it really helped

[@AdamSmith-ux5if]

Hi Corey! You’re fckn awesome man! Thanks for the videos!

[@coreyms]

Thanks!

[@user-pt4vn5hr2z]

Corey thank you!.

[@Mikey-nh9jf]

Great stuff man!

[@coreyms]

Thanks!

[@priyabratasaha4339]

Hello Corey, Love your videos. I am currently focusing on metaprogramming in python. Your video on decorator helped a lot. can you suggest some good resources about meta classes and descriptors. Thanks a lot for your effort

[@monzuruljhoney001]

Why does SET take O(1) ? Is it usung Hash Algorithm or some others?

[@jagmeetsond6075]

please keep up the good work, thanks a lot!

[@tranthanhbao9978]

Great video !!

[@raraju789]

Please do a video on multiprocess

[@klaik30]

One thing I don't really get is how some of these inbuilt functions can be so much faster than any other function you could yourself write. Doesn't the program have to do the same thing but more when I first convert the list into a set then the set into a list again? Doesn't it still have to go through every element and check if it has already saved a certain value? What magic is happening behind the curtains?

[@barbarairena6714]

can so give me an practical example of how to use O(n) and O(1) ? thanx

[@annakh9543]

thank you, very good explanation :)

[@smoothbeak]

Great info!

[@lephucnguyen8750]

Thank you so much, this video is very helpful!

[@jessicabrown1987]

Thank you so much for these

[@KlinikXOfficial]

would of been awesome if you added union method in there.

[@akshadrathod9203]

nicely explain!!

[@pakapeta7772]

Thanks man!

[@ramanak2213]

Thank u

[@bingolio]

Excellent, thx.

[@kiraal3619]

for min 7:44, i tried something else which is way complex XDD. but i just would like to share s1={1, 2, 3,4,5,6} s2={5,2,7} s3={1,2,5,7} first_intersection=s1.intersection(s2) ## intersection between S1 and S2 second_intersection=first_intersection.intersection(s3) ## intersection between S1,S2 and S3 print("intersection between S1 and S3",first_intersection) print("intersection between S1,S2 and S3",second_intersection)

[@convolucion1981]

Great!

[@ashok9588]

best ever

[@sagarmehta3515]

Hi Corey, could you please add some tutorials on the magic methods ( setattr, getattr, setattribute, getattribute )

[@nesrineb21]

excellent !!!

[@jasondeb2678]

could you please explain big O' notation in a separate video, that would be very helpful?

[@nocturn2002]

how can someone dislike the video

[@IsaacC20]

I'm surprised you didn't cover how to make sets of custom user objects.

[@mihaiconstantin6815]

Hey! You're videos are fantastic, but trying some things by my self while watching your video, i've come up with this: ss1 = {1,2,3,4,8,9,11} ss2 = {2,3,4,5} ss3 = {3,4,5,6} ssx = {2,3,5,6} ss5 = ss1.difference(ss2, ss3, ssx) print (ss5) #output -> {8, 1, 11, 9} Please explain me why this order?

[@iToastDevice]

the return output from sets are not in any specific order

[@sfr36]

we use sets where the order is not important. it has random order assigned to it. this is why indexing is also not supported like lists

[@owen7081]

Your awesome, this helped a lot.

[@MouhamedSourangProfile]

Amazing!!

[@programmer4833]

I do have a question : I didn't understand the last comment you made about O(n) for lists and O(1) for sets. What does that mean ?

[@sebastiancristicastillo479]

That is a notation that says how much time it will take to complete, depending the size of the operation. being O(n) the time the operation takes to complete increase as the list grow in size, but O(1) is constant and will not be affected by the size of the data set. You can search for more info about it looking for "Big O notation"

[@DevastaingDj]

Thank you so much!

[@hamzashabbir3589]

Why Set has O(1) Complexity? Didn't understand that. Lits is Fine O(n) as it traverses each element to find a value.

[@ghanteyyy]

Hi Corey! Thanks for the awesome videos. If you don't mind, I really need your help to learn sending attachments like photos, videos, documents ,etc in email using email module.

[@gtg7529]

Thanks your video! and because your channel does not update more than 1 month, i am very worry about u!

[@coreyms]

I’m just working on larger series’. I’m going to try to put out more smaller videos like this once a week while working on larger courses from now on

[@subashchandrapakhrin3537]

Good One

[@expat2010]

IDK about anyone else, but generally I am working with datasets. SO for me, what is missing from this video and many others, is how to use a function like this working with a dataset. For example, how to search a column for a member of a set.

[@LearningOrbis]

There is no column for the number in set. There is no order of elements inside the set. You can watch detailed videos on different Data Sets at my Channel :)

[@carpediem73]

thanks

[@foreversleepy4379]

Wouldn't creating a list from a set be O(n) time, though? So while using a set to remove duplicates is better, if you're casting it to a list, would it really make much difference?

[@babysuyash]

Thank you for the great explanation !! I understood everything about sets but I got confused when you did set(gym_members).intersection(developers) in 14:58 ...I was confused whether developers , a list , should be changed into set before intersection..... is developer already changed into the set or intersection is done between list and a set?

[@CosmosWorld]

As you see, the program has no problem with that, so i say, that if you intersect a set to a list, it won't produce any problem.

[@akhilpadmanaban3242]

Hey, what is the time complexity of list(set(l1) ),,...Is that O(n)