#61 Python Tutorial for Beginners | Iterator 

print(next(values)) prints 1 and also changes the state of the iterator after which num = 2. So the for loop will print the numbers from 2 to 10.

The raise keyword is used to raise an exception. You can define what kind of error to raise(here its StopIteration).

Sir, when will you make videos on tikinter and other python GUI?

sir can you put another vedio on this. i dint understand completely.

This was exactly what I needed thank you

The when you say Iterators. How cool is that..

Can someone or Navin tell me this that why are we not converting that TopTen class object 'values' to iterator object i.e like values = iter(values) As you are not creating iterator object in last example how is __iter__ method getting called or how is it working without it. As far as i know if we create an object of class only init method gets performed without calling. Please Help me with this. And Cheers to your work Navin. Thank you very much

There was an indentation error at return val thats why its repeating., remove 1 space before return.

Dil se dhanywaad🙏✌️🤗

break also possible

print statement prints 1 and the for loop prints 2, 3, 4,..., 10

after a long time i have seen your mustache

why we use iterator? I mean if we have for loop, then why iterator? Any real world programming example where this is used?

Excellent video! Thank you

Instead of raise stop iteration can't we just use a break statement after else

Sir the video is a little bit confusing regarding creating an our own object of iterator My doubt is initial part of video we created our own iterator object that is it,then what is the difference

i geniunly have a hatred toward people using light mode

How we typed self.num and we hadn't typed method named num or class nemed num?..num is not defined..

class TopTen: def __init__(self): self.num=1 def __iter__(self): return self def __next__(self): val=self.num self.num += 1 return val values = TopTen() for i in values: print(i) ------------ i'm getting error like: TypeError: 'TopTen' object is not iterable ------------ Could'u help me to fix this ?

Good

Where are you from?

Sir, please make on video of game development and app development.

Object is not iterable sir what's the prblm

what is the use of __init__(self)? why cant we simply use val and increment values to it?

Sir, At last when we call print values then we should two ones because of init function and other one is because of iter function but we are getting only one value of 1. I am not understanding this can you help me in this.

we are hearing to learn, not checking your talent.

sir how to do text parsing in python?

Nice!

In pycharm you can use (control + d) to copy the line and paste it onto the next in the place of using (ctrl + c) and (ctrl + v).

omg you are a true programmer :D i lauoh so hard when the output print None. i like you debuging method

binod bonod

Sir can you please create video on data structure and algorithm

Sir, Why can't we use break in else part to stop the execution of for loop ?

whether during the creation of the object itself __iter__() method is called just like __init__() method? Is __iter__() method is called only once?

and instead of giving exception in else part can we give break statement at the end of if statement?

hi sir,I don't have IT background ,completed B.Sc. Zoology in 2013, now keen to join IT field,so can I start my career in Python ? Are jobs available for fresher Python Developer in market? Could you please guide?

I really Want to thank you Navin Sir..My college faculty never focus on the concepts of programming they are just making us rattutota... Thank you so much sir for coming on youtube and helping the students

can we use break instead of "raise stop iteration"

What is the use of iterator while we have a for loop and we can go for a every element of the list....

hiii bro, create the own class that not repeat again values...but inbuild the value or nums it can repeating ....i wanna clear about it this video

first example in list: values are repeated but while creating our own iterator values not repeated why this is happen plzz give me the difference of this scenario

Sir, My Final Year Project is on Virtual Mouse using Hand gestures using OpenCV and Python,Can you please help me in this,Sir?

Under the def __iter__() method, why are we returning self only? And what does he mean by 'returning the object' when using this method? It's just a self keyword with no parameters. What does this mean? Please help

By this way are v overloading the Iter & next inbuilt function ?

What is going on behind for loop it is good,,,, but what is the use of iterator

Iter is linked to next , how and what it's doing,(return self) !

wow you really explain well and are one of the few indians that have no accent almost respect

Nice mustache! It suits you Sir. :-)

I really want to Thank you Sir for all the efforts and also for your nice energy, I hope that you still have this awsome energy and vibes, God bless you !!!

how many of you went back video and see he have mustache(search meaning in google) of our teacher 😂🤣🤣

In if condition can we use break to stop the iteration 9:33

Im sorry to say your explanation is becoming staler and actually complicates the concepts,for the last 3 videos including this one .i had to go to another video and learn it and comeback here.i hope i don't have to do that every video from now on

sir!!!! in the before example u have shown the repeation of values getting in output...but in this example why it is not repaeting 1 and taking next values......

Sir, where have you learnt all this stuff . I am watching the whole series,your concepts are strong. Can you please tell me which course or way should I choose , For web development via. Python. I am cs student. 2nd yr

instead of for why we don't use while i

Sir why can't we use break statement 🤔🤔

Sir can u make video for machine learning usking sklearn lib for data science

sir can you let us know a real life example where we use iterator

I just debug and found how that statement for i in values just calls the next function in Topten class , every time after printing the value of i . This is awesome . You should include a debug session in this video itself.

not sure why this particular lecture was needed :( .. was very confusing

Sir other way to stop the loop is self.num=self.num+0 , is this right sir

def __iter__(self): return self What is the reason of using it? Can anyone explain?

It will be very very gladful if you give sometime in answering the good questions asked by us. Because we get into some confusion whose answers are not available on google. Then we got stucked there. So please at least give us any opportunity to get the confusion clear in between 2 days so that we will also don't lose the interest in clearing the questions. If you don't have that much time then you can also answer only necessary and tough questions.

class TOPT: def __int__(self): self.num=1 def __iter__(self): return self def __next__(self): if self.num

Why do we need the iter() method while defining our own iterator???

Can someone help me know that what happens after "for i in values " is called ?

Hello sir, love from Pakistan...!

It prints 1to10 but if we remove for loop it will give you only one

Can we say we are using method overloading here?

I still can't seem to comprehend the word iterate, aswell when he says it 'loops' over. I would really appreciate if anyone could dumb down the explanation as much as possible I'm desperate to understand this concept lol. Thank you in advance

I'm confused. Couldn't we just print "nums" to output the values? Why did we need a "for" statement to display all 4 values?

why even without calling iter and next methods they are running

hiii bro, create the own class that not repeat again values...but inbuild the value or nums it can repeating ....i wanna clear about it this video

sir i have a question Why u used " raise StopIteration " ? why not u use " Break " instead ??? please explain anyone

modified iterators form where to start and where to stop: class ur_choice: def __init__(self, num): self.nums = int(input('enter from where to start')) def __iter__(self): return self def __next__(self): if self.nums

If something is returned in a function it return value to function call right ? What is happening to return here. Object is being returned......

list is already an iterator.why making it iterator again

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sir what is the advantage of iterator over for loop

To be honest i understood this better from u sir in comparison to code with harry ,i m not comparing but actually u r a little better in explaining , don't kill me code with harry fans i am also his fan it's just my opinion

What happens if we print(next(it)) beyond the range of list? I mean what if we use print statement 6 time if the list has only 5 values? And can we access the index of an element using iter() and next()?

what is the use i dint understand when u want to print one by one it is done in 1st example bt in 2ns e ample own iterator all numbers are printed at once not as u told one by one dint understand what’s the real use u want to tell sir

class iterator: def __init__(self): self.a = 0 def __iter__(self): return self def __str__(self): return '{}'.format(self.a) def __next__(self): if self.a

class Habit(Str): pass print(Habit("yellow")) O/p :. Yellow How it works internal Plzzz sir it's important for me

one more video on iterator please

since we already have for loop to iterate the list then why are we making things more complex by making this iterator

this we can use for interview question but for loop is the best. I haven't used this loop in my entire life

What does that __iter__() method do here sir

sir after class python is becoming difficult any suggestion

concept is extremely good no doubt on that, but your new look does not matching with personality..... but really your teaching style is awesome, thank god that you are providing such valuable knowledge with free of cost...

it should not print the value "1" again because now value pointer has moved to next which is "2"

Complex program...😥

at 5:11, why did the for loop print 7 and 8 again? this contradicts with 10:22 no?

If you type print(next(values)) after the for loop, you will get an Error.

please make series on python turtle

Hey if we have for loop to print 1 to 10 number, why should we use this iterator

I like your learning style

I like your moustache

very interesting and knowledgeable tutorial.👌👍

sir could you please suggest me a source from where i can practice python, please!!