next — Easy Playground

Returns the next value from an iterator; raises StopIteration when done

Python Playground

class Counter:
    def __init__(self, limit):
        self.limit = limit
        self.current = 0

    def __iter__(self):
        return self

    def __next__(self):
        if self.current >= self.limit:
            raise StopIteration
        self.current += 1
        return self.current

for n in Counter(3):
    print(n)

Output

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__next__ returns the next value from an iterator; raises stopiteration when done. Implementing it lets you customize how Python interacts with your objects.

Challenge

Try modifying the code above to explore different behaviors. Can you extend the example to handle a new use case?

View all Easy examples for __next__

__next__ — Easy Playground

Challenge

next — Easy Playground