How do I handle exceptions in ProcessPoolExecutor?

How do I handle exceptions in ProcessPoolExecutor?

You can handle exceptions in ProcessPoolExecutor by using the Future objects returned by the submit method. You can check for exceptions using the result() method.

Can you give me an example of that?

Sure! Here's a simple example:

from concurrent.futures import ProcessPoolExecutor

def task(x):
    if x == 0:
        raise ValueError('Zero is not allowed!')
    return 10 / x

with ProcessPoolExecutor() as executor:
    futures = [executor.submit(task, i) for i in range(-1, 2)]
    for future in futures:
        try:
            result = future.result()
            print(result)
        except Exception as e:
            print(f'Error: {e}')

What happens if I don't handle exceptions?

If you don't handle exceptions, they will propagate and can cause your program to crash. It's important to manage them to ensure your application runs smoothly.

Are there any best practices for using ProcessPoolExecutor?

Yes, some best practices include using a context manager, limiting the number of workers, and always handling exceptions to avoid crashes.