BSK-E0140 error

Callable and Protocol assignment compatibility

Checks that when a function is assigned to a variable annotated with a Callable type or a callback Protocol, the signatures are compatible.

How to handle it

Every rule is on by default — strict is the default, not a cage. You can dial BSK-E0140 down per-file or per-path from your editor or pyproject.toml, or fix the code so it type-checks. See the Type System rules and the complete diagnostic reference.

Canonical URL: https://www.basilisk-python.dev/errors/BSK-E0140