Python Tutorial: Iterators and Iterables - What Are They and How Do They Work?

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  • Опубліковано 7 лют 2025

КОМЕНТАРІ • 317

  • @erdi749
    @erdi749 3 роки тому +87

    These tutorials are epic, how can you talk 20mins without any single unnecessary word, truly amazing. Thank you so much Corey. You are my #1 Pyhton reference in my classes I teach in the collage! Keep up the great work!

  • @gioxc88
    @gioxc88 6 років тому +460

    best python instructor ever

  • @ji-axinliu4448
    @ji-axinliu4448 3 роки тому +1

    Thank you, Sir. I wake up at 4 in the morning and continue watching your lessons.

  • @beginner_bro
    @beginner_bro 7 місяців тому +2

    This is your first video I am watching. And this single video forced me to subscribe your channel. Great job man

  • @judeleon8485
    @judeleon8485 4 роки тому +22

    Corey, you're awesome! You always make my day. Anytime I'm in need need of a lesson on any python topic, your channel is always my first port of call, to see if you have it. You always know how to make it sink in so well. Thanks

  • @shahzebafroze4093
    @shahzebafroze4093 6 років тому +106

    Thank you for making these awesome videos!! Goal after graduation: support your channel.

  • @aman0509
    @aman0509 5 років тому +13

    Closure and Decorator tutorial of yours was my first experience and I am telling you, you have explained it in such a good way that I cannot forget it ever. I am not being dramatic but your explanation method is magical. When I am learning any concept, there are things which are buried inside my mind and but it cannot get out because I feel confused and also nobody talking about the same or have that kind of explaining system as yours. It's like you are connected to my mind.
    So, Thank You Very Much!! God Bless You!!

    • @coreyms
      @coreyms  5 років тому

      Thanks! Glad to hear that

  • @veeplusvee
    @veeplusvee 3 роки тому +5

    Corey, Simply you are the best when it comes to making someone understand the concept. Unless someone understands the concept, it is very difficult to write codes that are lot efficient and at the same time very easy to understand/read. I wish everyone who makes video on programing follows a similar template for teaching. Thanks a lot.

  • @mahesh_kok
    @mahesh_kok 6 років тому +30

    Corey Schafer ... U are the only Foreign UA-cam, Instructor of Python whom i Follow. Your Videos contains information multifolds 10 which we get from any other video.. I am Surprised how do u do this...You make Sound Python Like Childs Play ... Hats off to u ... Expecting Machine Learning from You. That could be the Internet Breaker Videos of Yours

  • @emmanuel5566
    @emmanuel5566 4 роки тому

    dude.. your voice is so distinct and your explanation is crystal clear.
    if I can't find something on StackOverflow or if I'm learning a new concept in python, your channel is THE resource for me. Great content.
    Thank you for keeping it free.

  • @halim1885
    @halim1885 6 років тому +1

    i've tried a lot of teachers in order to make progress and non of them works , you are the best sir i advise everyone want to learn python to watch your serie

  • @baqir5652
    @baqir5652 5 років тому +7

    Oh My God....I didn't know learning python can be this addictive.... Thank you sooooooooooooooo muchhhh

  • @Greenbay-bn3yk
    @Greenbay-bn3yk 7 місяців тому +1

    Old but Gold. What an excellent explanation

  • @HareshRathod
    @HareshRathod 5 років тому +9

    OMG! Watching since last 4.5 hours, dont know when last I have wateched videos for so long. Addictive. Corey you must be a Teacher. Thanks for such nice videos

  • @IterativeTheoryRocks
    @IterativeTheoryRocks 5 років тому

    Excellent idea with the coding problems. You never really understand something until you have to use it!

  • @gajatanu2962
    @gajatanu2962 Рік тому

    Even after years, This is easy to understand and relevant, Thank you very much man

  • @feernot
    @feernot 5 років тому +2

    You seriously teach this stuff better than anyone I've found. Thank you so much!

  • @RuslanSheffchenko
    @RuslanSheffchenko Рік тому

    thank you so much for this video. I've been queering bing chat and bard chat for a couple of hours on the iterable and iterator topics but none of them managed to explain the stuff to me in a so clear way that you did.

  • @furankuraw7741
    @furankuraw7741 6 років тому +32

    Thank you so much for the consistent videos and tutorials and the help that you provide for people new to this ^^

  • @techcode_man
    @techcode_man 6 років тому +18

    Corey, Thank you for explaining this so well and simple. I have been using both iterators and iterables for while, now it makes a lot of sense.

  • @WaldoTheWombat
    @WaldoTheWombat 2 роки тому +12

    1. In Python, an object can be called an "iterable" if it has the dunder method __iter__ which should return an iterator and an iterator is an object that has the method __next__.
    2. __iter__ is a method that a python list has.
    3. By performing the for loop on the list, python invokes that list's __iter__ method which returns an iterator that we can loop over.
    we can do next(mylist.__iter__()) which invokes the iterator's __next__ method or call or invoke it directly: mylist.__iter__().__next__()
    we can also do next(iter(mylist))
    "Generators are iterators as well, but the duder iter and duner next methods are created automatically."

  • @sg8581
    @sg8581 Рік тому

    One of the best explanations on iterators. Thanks a ton!

  • @akashsrane
    @akashsrane 4 роки тому

    Just half done with the video and just want to say WOW!!! Corey, try writing your own python book.

  • @yaboi1525
    @yaboi1525 4 роки тому +1

    You're the best instructor I ever had. Thanks for all your precious efforts it mean a lot.

  • @albertdugba
    @albertdugba 6 років тому

    You're definitely the best python instructor on UA-cam by far...But some of us will appreciate it you could maximise the screen size we can clearly see instead of straining our eye which is probably not the best. Thank you

  • @dev4life
    @dev4life 6 років тому +49

    Correction at 1:38 Corey said "Loops aren't the only thing that we can loop over " but he meant "Lists aren't the only thing that we can loop over "

  • @chuckles8519
    @chuckles8519 2 роки тому

    You have a very clear teaching style - a very valuable talent to have!

  • @pedrocontrerasavendano8578
    @pedrocontrerasavendano8578 6 років тому +7

    Precise, coherent, well articulated and well structured; good tutorial, thanks

  • @Ammothief41
    @Ammothief41 5 років тому +3

    So python lists are singly linked lists! Awesome! Thanks for this and the tutorials on generators. I purchased a python book but it never delved into the material as deeply as what I wanted. Thanks.

  • @rajgiriyt8494
    @rajgiriyt8494 3 роки тому

    explaining each and every steps. where were you before. please do not leave this way of teaching. we beginners needs you

  • @vvkkumar3691
    @vvkkumar3691 5 років тому +2

    Hi Corey, most of my doubt got clear through this channel . Thank u so much for this . I am suggesting two more topic please make a video on those.
    1. Why Tuple is faster than List ?
    2. Why List comprehension is faster than for loop?

  • @swapnilp4629
    @swapnilp4629 3 роки тому

    looks I found this bit late since this was published but trust me Your are the Best . I have gone through so many videos but the way you explain and demonstrate is AWESOME!! Keep it up :) All the best...

  • @AshisRaj
    @AshisRaj 3 роки тому +1

    My search ends here. Excellent explanation

  • @zyenapz
    @zyenapz 4 роки тому

    Thanks for the straightforward and non-verbose explanation!

  • @arjunkrishna721
    @arjunkrishna721 3 роки тому

    you can technically get a reversed iterator, that'll look something like
    i_nums = reversed(nums)
    calling next(i_nums) will iterate through the list backwards.
    Much love, awesome teaching !

  • @sampleraja8026
    @sampleraja8026 2 роки тому

    He can make sense to even an absolute beginner, good

  • @venkatdevireddy650
    @venkatdevireddy650 6 років тому +13

    Ur videos are awesome Corey I have been watching all ur videos... please make an video on SYS module as well as XML parsing...I have got bunch of videos from you tube none other videos are up to the mark as u...ur explanation in any concept is at peeks no body beats u... thanks a lot

  • @calebthompson1037
    @calebthompson1037 3 роки тому

    Classes in school should be like this a hyperlink to what you dont understand included. 💯

  • @rainman13579
    @rainman13579 3 роки тому

    Still being perfect explanation, there is still a need for preparation work to understand all the stuff Corey is explaining.

  • @Matharendre
    @Matharendre Рік тому

    It really sums up the concepts in a concise but precise way.
    Thank you a lot for this!

  • @madhusudhanreddy650
    @madhusudhanreddy650 5 років тому

    superbly explained,has none programmer can easily understand dif btwn Iterables and iterator

  • @danielkamau8436
    @danielkamau8436 3 роки тому +1

    good_tutor = "Corey Schafer"
    while True[good_tutor]:
    next(good_tutor)
    #looping forever sir thanks for expensive, but free endless knowledge. go beyond.

  • @666shadowblade666
    @666shadowblade666 2 роки тому

    Again, exactly what I was needing to clarify. Thanks.

  • @hubertcombomarketing2693
    @hubertcombomarketing2693 4 роки тому +1

    Great Python Iterators and Iterables Tutorial. Thank You.

  • @bharadwajsaibandaru4323
    @bharadwajsaibandaru4323 3 роки тому +1

    Hey Corey ! there you go . The best python instructor on UA-cam ever . Kudos to your subject knowledge and teaching in an easy and understandable way . Expecting JavaScript tutorials from you too.

  • @DioD3
    @DioD3 4 роки тому +1

    Excellent video. Thank you! You are my favorite programing(python) teacher.

  • @yuanli5619
    @yuanli5619 4 роки тому +1

    Best Python tutorial

  • @bright5801
    @bright5801 4 роки тому

    before i watch any python tutorial i check to see if Corey has done it first

  • @xaverxassnytz2746
    @xaverxassnytz2746 5 років тому +1

    very good explanation in this and generators video (also watched your other videos) - thanks to Corey
    coming from old languages like Fortran, Cobol, Pascal and I just began learning python 3 months ago and this videos helped me a lot to get a basic knowledge

  • @TonyFlexPromo
    @TonyFlexPromo 6 років тому +3

    At first i was totally scared of iterators. Next i took a study and understood how do they work and why they are used. Next i wrote some iterators and generators on my own. Then i got a question about iterators on job interview and i was one of few people who actually answered the question (as they said later). Now i really love this feature of python and this is kinda future of it because whole async thing is based on yield thing.
    Thank you for videos! I continue to learn a lot from you!

  • @DevinderKumar
    @DevinderKumar 4 роки тому +1

    Super, very useful lesson. Great stuff in a shortest possible time. Thanks a lot.

  • @shashishekhar----
    @shashishekhar---- 2 роки тому +1

    Thank you so much Corey, much appreciated how helpful this(these) videos are, just thank you 👍

  • @gustavojuantorena
    @gustavojuantorena 3 роки тому

    This video is pure gold!

  • @TheSumanb
    @TheSumanb 3 роки тому

    Thanks a ton ... your way of teaching is one of the best , please keep on posting tutorials on pandas and Numpy or any advanced python topics , thanks

  • @temilolafamakinwa1626
    @temilolafamakinwa1626 Рік тому

    Excellent explanations are always!!

  • @samed3554
    @samed3554 2 роки тому

    Very plain and well explained. Thank you Corey, subbed.

  • @marioestrada2233
    @marioestrada2233 3 роки тому +1

    Many thanks man! You are truly great at teaching! Please continue with this awesome work

  • @subhamthemusicalguy8851
    @subhamthemusicalguy8851 4 роки тому

    Best video for Python.Thank you sir

  • @MagnusAnand
    @MagnusAnand 5 років тому +2

    This video is amazing! Your teaching skills are top

  • @billgarcia471
    @billgarcia471 3 роки тому

    Thanks a lot for the video, man it's very helpful to explain some vague ideas from some modules.

  • @parmachine470
    @parmachine470 3 роки тому

    Here' the beef! lots of pretenders, but Corey is the real deal. Iterators, generators, closures. All from the same county.

  • @TheNormanbro
    @TheNormanbro 4 роки тому +3

    Everytime when he says "dunder", i start to laugh because of "Dunder code" episode of The Office.
    And this is a great video. Thank you.

  • @grzltn9716
    @grzltn9716 6 років тому +1

    Perfectly pitched overview. Thank you.

  • @rossli8621
    @rossli8621 2 роки тому

    This should be in my school's programming 101 course!

  • @DomenicoTanzarella
    @DomenicoTanzarella 5 років тому +4

    Brilliant Corey: one of your best videos!

  • @deojeetsarkar2006
    @deojeetsarkar2006 5 років тому +1

    this guy's a genius

  • @Everyday-Explore
    @Everyday-Explore 5 років тому

    Wonderful teacher. Clear precise and best..

  • @MehmetMustafaICER
    @MehmetMustafaICER 5 років тому +1

    Thank you for this video. It is pretty clear and to-the-point. Well done.

  • @adamobaid3558
    @adamobaid3558 6 років тому +1

    Thank you, you are great instructor. These videos are awesome and have helped me so much. I will make a contribution when I get hired soon!

  •  2 роки тому

    A video on unit testing iterables, generators, and, unit testing functions that consume iterable objects would be great.

  • @TheGroundskeeper
    @TheGroundskeeper 2 роки тому

    So, weird moment for me. I like to go back over the parts where my ADHD started to go crazy, and when you said "Now remember I said iterators are objects with a state that..." is when I went to back up a few minutes to get back on track. When I randomly let go, you said "iterators are objects with a state that...", so I weirded out and instantly now remember this rule. I have absorbed your power. There can only be One.

  • @johnwight6041
    @johnwight6041 Рік тому

    Wow really good explanations! This makes a lot of sense

  • @jessicabrown1987
    @jessicabrown1987 5 років тому

    Corey you are the best.

  • @rawlespringer3917
    @rawlespringer3917 5 років тому +2

    wow you certainly have a gift for teaching...

  • @szabikrdev5066
    @szabikrdev5066 2 роки тому

    Cheers man, this was extremely useful piece of content!

  • @xlulu464
    @xlulu464 4 роки тому

    finally i can try to understand why for loop is different from while loop. thanks

  • @Sabre00
    @Sabre00 5 років тому

    From the time you mentioned the never ending generator and iterators not being able to be recalled it reminded me of a database auto-increment field.
    Just waiting for the timeseries MatplotLib video.

  • @peterdannemann2041
    @peterdannemann2041 6 років тому +2

    Awesome content as always. Please make a video on asynchronous python programming!

  • @zhukovmisha
    @zhukovmisha 5 років тому +4

    Thank you for such a profound explanation!

  • @tijanimoncef5314
    @tijanimoncef5314 3 роки тому

    I learn much thanks to your courses.
    I would just make a remarque : in class MyRange __next__ it should be (if self.value > self.end:) rather than (if self.value >= self.end:)

  • @kentsang9376
    @kentsang9376 3 роки тому

    very great video, clear my concept!! Thank you!

  • @Alex-rw9yj
    @Alex-rw9yj 3 роки тому

    Thank you, man! Very clear and concise.

  • @billykotsos4642
    @billykotsos4642 5 років тому +1

    Great Tutorial

  • @panditnandlalpatherwali5979
    @panditnandlalpatherwali5979 6 років тому +5

    Corey I am big fan of you videos, kindly post the video on pytest

  • @alexandredamiao1365
    @alexandredamiao1365 4 роки тому +1

    Your lectures are amazing! Thank you so much for this!

  • @2mitable
    @2mitable 5 років тому +2

    thank you for this amazing video i have seen lot of videos from sentdex but still sometimes i did not understand as compare to you explanation Thank you very much you are helping like us soon i l help you i m trying to freelance in python thank you :D

    • @DASyam-tb7qt
      @DASyam-tb7qt 5 років тому

      I used to listen to sentdex but after finding schafer, I found myself listening to schafer like 90% of the time. No hate to sentdex, tho. Subbed to both.

  • @klo1603
    @klo1603 6 років тому +1

    Had a long time issue in understanding this concept. You, Corey has always made easy to understand. Can you please make a series on selenium in python.

  • @konstantin6482
    @konstantin6482 5 років тому +4

    Great video, but I don`t quite get one thing. It seem that at 14:30 when you use a for loop on new object *__next__()* method is somehow called. But there is no reference to it anywhere in the class *Myrange* you`ve just created. I suppose that *__iter__()* method somehow calls it, but how does it exactly work?

  • @zikomo8913
    @zikomo8913 4 роки тому +1

    Holy shit, even a summary at the end! Can a tutorial get any better than this?

  • @JoySenseKO
    @JoySenseKO 5 місяців тому

    You are simply amazing ❤

  • @whoami2091
    @whoami2091 3 роки тому

    You are a king man!

  • @tunkyi7162
    @tunkyi7162 5 років тому +2

    you are making me clear things up. I gave a like and subscribed to your channel.

  • @AlanWagoner
    @AlanWagoner 6 років тому +1

    Very nice Corey! Thank you!

  • @xiaoweidu4667
    @xiaoweidu4667 4 роки тому

    fantastic teacher

  • @JuanCEOs725
    @JuanCEOs725 Рік тому

    Simply the best!

  • @hetalchavan9446
    @hetalchavan9446 5 років тому +1

    Amazing lecture!Very informative!Already subscribed after seeing this one.

  • @Karthik_705
    @Karthik_705 6 місяців тому

    Nice Explanation

  • @antenorzapata
    @antenorzapata 3 роки тому

    what a great lesson. thank you so much!

  • @mostafaghanem3984
    @mostafaghanem3984 Рік тому

    Thank you , you’re the goat

  • @Borisam
    @Borisam 2 роки тому

    Great explanation!!!