What are the best practices for multiprocessing in Python?

What are the best practices for multiprocessing in Python?

When using multiprocessing in Python, it's important to follow best practices like using the if __name__ == '__main__': guard, managing shared resources carefully, and avoiding global variables.

Can you explain why the if __name__ == '__main__': guard is necessary?

The guard prevents the child processes from executing the main code block again, which can lead to infinite recursion and crashes.

What are some common pitfalls to avoid when using multiprocessing?

Common pitfalls include not handling exceptions in child processes, excessive use of shared state, and not properly joining processes.

How can I share data between processes?

You can use shared memory, multiprocessing.Queue, or multiprocessing.Manager to share data between processes.