weakref — Expert Playground

Weak references that don't prevent garbage collection

Python Playground

# weakref internals
import weakref
import sys

mod = weakref
print(f"Module: {mod.__name__}")
print(f"File: {getattr(mod, '__file__', 'built-in')}")
print(f"Package: {getattr(mod, '__package__', 'N/A')}")
print(f"Size in modules: {sys.getsizeof(mod)} bytes")

Output

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Understanding the internals of weakref helps write more efficient code.

Challenge

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

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