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import gc
import sys
from typing import Any
import objgraph # type: ignore[import-untyped]
from multidict import MultiDict
class NoLeakDict(dict[str, Any]):
"""A subclassed dict to make it easier to test for leaks."""
def _run_isolated_case() -> None:
md: MultiDict[str] = MultiDict()
for _ in range(100):
md.update(NoLeakDict())
del md
gc.collect()
leaked = len(objgraph.by_type("NoLeakDict"))
print(f"{leaked} instances of NoLeakDict not collected by GC")
sys.exit(1 if leaked else 0)
if __name__ == "__main__":
_run_isolated_case()
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