Quiz: Python Module Attribute Access

Review

1. Which module-level function can supply a value for a missing attribute?

   Module-level __getattr__ is consulted after ordinary module attribute lookup fails.
2. What happens when the module already has an attribute with the requested name?

   The hook is a fallback for missing module attributes, not a general interceptor.
3. What should module-level __dir__ return?

   The hook returns an iterable of names; dir() returns the names sorted.
4. Does returning a value from module-level __getattr__ automatically add it to module.__dict__?

   A returned value is not automatically cached in the module namespace.
5. Which exception should the hook raise when it does not support a requested name?

   AttributeError is the signal expected by ordinary attribute lookup and helpers such as hasattr().