Can some plz explain this code to me

Question

class Alphabet():
def __init__(self, letters):
self.letters = letters
self.index = -1

def __iter__(self):
return (self)

def __next__(self):
if(self.index) >= len(self.letters)-1 :
raise StopIteration
self.index += 1
return self.letters[self.index]

Answer 1

Alphabet is an iterable object. So it implements the methods __iter__ and __next__.

__iter__ has to return an iterable object which means an object with a method __next__.
Normally this object is the object itself.

The method __next__ describes, how to iterate the object. Here you are free.

see example for different iterators:

https://code.sololearn.com/c7LSgVH4CgxZ/?ref=app