Python's weakref.WeakKeyDictionary is a class that provides a dictionary-like container for storing key-value pairs. The key objects are held with weak references, which means that if there are no other strong references to a key object, it may be automatically removed from the dictionary. This allows the garbage collector to collect and reclaim memory for key objects that are no longer in use. The values in WeakKeyDictionary can be any object, and they are not affected by weak referencing, meaning they are not automatically removed when their corresponding key is collected. This dictionary is particularly useful in scenarios where you want to associate data with objects but do not want to prevent those objects from being garbage collected when they are no longer needed.
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