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from contextlib import contextmanager


events: list[str] = []


@contextmanager
def measure(name: str):
    events.append(f">{name}")
    try:
        yield {"name": name, "id": 42}
    finally:
        events.append(f"<{name}")


# 1. Normal use — yielded value bound to ctx
with measure("upload") as ctx:
    events.append(f"  inside: name={ctx['name']}, id={ctx['id']}")

# 2. Exception inside body — finally still runs, THEN exception escapes
try:
    with measure("download"):
        events.append("  download body")
        raise RuntimeError("network down")
except RuntimeError:
    events.append("  caught network error")

# 3. Same context name twice — each with-block creates a fresh generator
with measure("a"):
    pass
with measure("a"):
    pass

for e in events:
    print(e)

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