What is the difference between weak and strong references in Python?
An example of an AI chatbot conversation about weak vs strong references in Python.
What is the difference between weak and strong references in Python?
In Python, a strong reference keeps an object in memory as long as the reference exists, while a weak reference allows the object to be garbage collected if there are no strong references.
Can you give me an example of when to use weak references?
Sure! Weak references are useful in caching scenarios where you want to allow objects to be garbage collected when memory is needed, but still want to access them if they are available.
How do I create a weak reference in Python?
You can create a weak reference using the weakref module. For example: import weakref; my_weak_ref = weakref.ref(my_object).
What happens if I try to access a weak reference after the object is deleted?
If you try to access a weak reference after the object has been deleted, it will return None.
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