backports-weakref

import sys import os from backports.weakref import finalize class Resource: def __init__(self, name): self.name = name print(f"Resource '{self.name}' created.") def cleanup(self, message): print(f"Cleanup for '{self.name}': {message}") # Create a resource my_resource = Resource("DatabaseConnection") # Register a finalizer to clean up when my_resource is garbage collected # The finalizer ensures cleanup even if `my_resource` goes out of scope. finalizer = finalize(my_resource, my_resource.cleanup, "Closing connection...") print("Resource created, finalizer registered.") # Simulate removing the strong reference del my_resource # The finalizer will be called when the object is garbage collected. # Force garbage collection for demonstration (not typically needed in real code) import gc gc.collect() print("Program finished.")