The `multiprocessing.JoinableQueue` is a class in Python's `multiprocessing` module that provides a way for multiple processes to communicate and exchange data. It is based on the Queue class from the `queue` module and allows the sending and receiving of objects between multiple processes in a safe and efficient manner. The JoinableQueue also has additional methods such as `task_done()` and `join()` which enable coordination between processes, allowing for synchronization and orderly termination of the queue. Overall, the JoinableQueue is a useful tool for managing inter-process communication and coordination in Python multiprocessing.
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