4. Use contextlib.suppress for narrow ignored exceptions

Use contextlib.suppress when a specific exception is expected and can be ignored cleanly.

A narrow suppress block documents that the exception is intentionally non-fatal in this specific operation. It is much safer than a broad try/except because the ignored surface area stays small and visible.

4.1. Don’t do this

try:
    cache.pop('expired')
except KeyError:
    pass

4.2. Do this

from contextlib import suppress

with suppress(KeyError):
    cache.pop('expired')