What are some examples of using weak references in Python?

Can you explain what weak references are in Python?

Weak references allow you to reference an object without preventing it from being garbage collected. This is useful for caching.

Can you give me an example of how to use weak references?

Sure! You can use the weakref module. For example:

import weakref

class MyClass:
    def __init__(self, name):
        self.name = name

obj = MyClass('example')
weak_obj = weakref.ref(obj)

print(weak_obj())  # Outputs: <__main__.MyClass object at 0x...>

# Deleting the original reference
 del obj
print(weak_obj())  # Outputs: None

What happens when the original object is deleted?

When the original object is deleted, the weak reference returns None instead of keeping the object alive.