Quick Check: Python Annotations

Review

1. Which statement is a valid annotated assignment that also assigns a value?

   An annotated assignment puts the annotation expression after the target name and can optionally include a normal assignment value.
2. What is special about the target count in an annotated assignment?

   Annotated-assignment syntax permits one target, unlike ordinary multiple-target or unpacking assignment.
3. Inside a function, what happens when a name is annotated with an annotated assignment?

   An annotated local name is local to the function; local variable annotations are not evaluated or stored as function annotation metadata.
4. By default in Python 3.14, how are function, class, and module annotation expressions handled?

   They are deferred and evaluated when their values are requested. The explicit future import keeps the older stringized behavior.
5. What does an annotation alone do to runtime type checking?

   Annotations are metadata and do not by themselves enforce runtime types.
6. A tool must inspect annotations even when a referenced name is not yet defined. Which annotationlib format keeps unresolved names represented as ForwardRef objects?

   Format.FORWARDREF returns real runtime values where possible and ForwardRef proxies for names it cannot resolve.
7. Which statement about annotationlib.Format.STRING is correct?

   The STRING format may normalize or omit source details, and annotation introspection must not be treated as a security boundary.