Pažljivo pročitaj kod

import weakref
import gc

log = []


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


def cleanup(name):
    log.append(f"closed:{name}")


c1 = Connection("a")
c2 = Connection("b")
weakref.finalize(c1, cleanup, c1.name)
weakref.finalize(c2, cleanup, c2.name)

print(f"alive:{len(log)}")
del c1
gc.collect()
print(f"after_c1:{log}")
del c2
gc.collect()
print(f"after_c2:{log}")

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