How do I use the weakref module in Python?

How do I use the weakref module in Python?

The weakref module allows you to create weak references to objects, which means they can be garbage collected if no strong references exist.

Can you give me an example of how to create a weak reference?

Sure! You can use weakref.ref() to create a weak reference. For example:

import weakref

class MyClass:
    pass

obj = MyClass()
weak_ref = weakref.ref(obj)

What happens when the original object is deleted?

If the original object is deleted and there are no strong references, the weak reference will return None when accessed.

Are there any use cases for weak references?

Yes, weak references are useful for caching, preventing circular references, and managing memory in large applications.