Answer
Weak references allow referencing objects without preventing GC.
Useful in caching and preventing memory leaks in long-running apps.
Useful in caching and preventing memory leaks in long-running apps.
Quick Answer
Weak references allow objects to be garbage collected even if a weak reference exists. weakref.ref(obj) creates a weak reference - call it to get the object or None if collected. weakref.WeakValueDictionary: values can be GC'd when no strong references exist (cache that releases memory automatically). WeakKeyDictionary: keys can be collected. Used in caches, memoization, and observer patterns to prevent memory leaks.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ