v0.31.0 — Annotation-driven!

What's Changed

This release is a major step forward for Argh. It paves the way to a fully annotations-driven approach where decorators will remain a mere legacy.

This text is a brief summary of the full changelog entry: https://argh.readthedocs.io/en/latest/changes.html#version-0-31-0-2023-12-30

Breaking changes:

• The typing hints introspection feature is automatically enabled for any command (function) which does not have any arguments specified via @arg decorator.
• A small change in the legacy argument mapping policy BY_NAME_IF_HAS_DEFAULT concerning the order of variadic positional vs. keyword-only arguments.
• Removed the previously deprecated decorator @expects_obj.

Enhancements:

• Type hints: basic usage to infer argument types (fixes #203) by @neithere in #211
• Support realtime output through a pipe (fixes #145) by @neithere in #202
• High-level functions argh.dispatch_command() and argh.dispatch_commands()
  now accept a new parameter old_name_mapping_policy.

Deprecated:

• the namespace argument in argh.dispatch() and argh.parse_and_resolve().
  Rationale: continued API cleanup. It's already possible to mutate the
  namespace object between parsing and calling the endpoint; it's unlikely that
  anyone would need to specify a custom namespace class or pre-populate it
  before parsing. Please file an issue if you have a valid use case.

Other changes:

• Refactoring.

Full Diff: v0.30.5...v0.31.0