id() — Advanced Playground

Returns the unique identity (memory address) of an object

Python Playground

# id() - implementing the protocol
class Custom:
    def __id__(self):
        return "custom result"

obj = Custom()
print(id(obj))

Output

Click "Run" to execute your code

Understanding the dunder methods that id() calls helps you customize behavior for your own classes.

Try modifying the code above to explore different behaviors. Can you extend the example to handle a new use case?