_setattr_handler

Settings._setattr_handler(name: str, value: Any) → Callable[[BaseModel, str, Any], None] | None

Get a handler for setting an attribute on the model instance.

Returns:

A handler for setting an attribute on the model instance. Used for memoization of the handler. Memoizing the handlers leads to a dramatic performance improvement in __setattr__ Returns None when memoization is not safe, then the attribute is set directly.