What are some examples of using the weakref module in Python?

Can you explain what the weakref module in Python is?

The weakref module allows you to create weak references to objects, which means the referenced object can be garbage collected.

Can you give me some examples of how to use weakref?

Sure! One common use is to prevent circular references. For example, you can use weakref to reference an object without preventing its deletion.

How do I create a weak reference to an object?

You can create a weak reference using weakref.ref(). For example: import weakref; obj = SomeObject(); weak_obj = weakref.ref(obj).

What happens if the original object is deleted?

If the original object is deleted, the weak reference will return None when accessed.