What are some common errors in using concurrent futures?

What are some common errors in using concurrent futures?

Some common errors include forgetting to call shutdown(), not handling exceptions properly, and misusing the as_completed() method.

Can you explain why forgetting to call shutdown() is a problem?

Forgetting to call shutdown() can lead to resource leaks, as the thread pool may not terminate properly, causing your program to hang.

What about handling exceptions? How should I do that?

You should use a try-except block around your future calls to catch exceptions. You can also check the result of the future to see if it raised an exception.

Are there any best practices to follow when using concurrent futures?

Yes, always manage your resources carefully, use context managers, and prefer using ThreadPoolExecutor for I/O-bound tasks and ProcessPoolExecutor for CPU-bound tasks.