Скачать или смотреть Python 3 tutorial how to handle stopiteration exception

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handling the `stopiteration` exception in python is essential when working with iterators and generators. the `stopiteration` exception is raised to signal the end of an iteration, indicating that there are no more items to iterate over.

here is a step-by-step tutorial on how to handle the `stopiteration` exception in python 3 using a code example:

1. *creating a simple iterator:*
first, let's create a simple custom iterator class that iterates over a list of numbers and raises `stopiteration` when there are no more elements left.



2. *using the iterator:*
now, let's create an instance of our custom iterator and iterate over the numbers.



in this code snippet, we use a `while true` loop to continuously call `next()` on the iterator until a `stopiteration` exception is raised. at this point, we break out of the loop and stop the iteration.

3. *output:*
when you run the above code, it should output the numbers 1 to 5, each on a new line.



4. *handling `stopiteration` manually:*
alternatively, you can also handle the `stopiteration` exception manually by catching it and performing any necessary clean-up operations.



in this example, we catch the `stopiteration` exception and print a message indicating the end of the iteration.

handling the `stopiteration` exception correctly is important to ensure that your code behaves as expected when working with iterators and generators in python.

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