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Review profile: CHILL

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Run ID: 547176e7-0939-4c94-a62a-5a060c18f029

Reviewing files that changed from the base of the PR and between 48a3a1f and fd9cf58.

• Lib/test/test_types.py is excluded by !Lib/**

• crates/vm/src/builtins/tuple.rs
• crates/vm/src/builtins/type.rs
• crates/vm/src/object/core.rs
• crates/vm/src/object/ext.rs
• crates/vm/src/types/zoo.rs
• crates/vm/src/vm/context.rs

Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.

Walkthrough

The change stores PyType.bases as a typed Python tuple. It adds typed tuple construction and updates type validation, traversal, MRO handling, and bootstrap initialization. The type zoo and VM context now share the bootstrapped tuple type and empty tuple.

Changes

Typed tuple bases and bootstrap hierarchy

Estimated code review effort: 4 (Complex) | ~45 minutes

Merge Risk: ⚪ Minimal · up to fd9cf

This change preserves tuple subclasses passed as type bases, and no actionable merge-blocking risk remains after normal checks and review.

Sequence Diagram(s)

sequenceDiagram
  participant ContextInit
  participant TypeZooInit
  participant InitTypeHierarchy
  participant CoreTypes
  ContextInit->>TypeZooInit: initialize types and empty_tuple
  TypeZooInit->>InitTypeHierarchy: create BootstrapTypeHierarchy
  InitTypeHierarchy->>CoreTypes: allocate and initialize core types and tuples
  InitTypeHierarchy-->>TypeZooInit: return hierarchy and empty_tuple
  TypeZooInit-->>ContextInit: return TypeZoo and empty_tuple

Suggested reviewers: youknowone

• Create PR with unit tests

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📦 Library Dependencies

The following Lib/ modules were modified. Here are their dependencies:

[x] lib: cpython/Lib/types.py
[ ] test: cpython/Lib/test/test_types.py (TODO: 3)

dependencies:

• types

dependent tests: (57 tests)

• types: test_annotationlib test_ast test_asyncgen test_asyncio test_builtin test_call test_code test_collections test_compile test_compiler_assemble test_coroutines test_descr test_dis test_doctest test_dtrace test_dynamicclassattribute test_email test_enum test_exception_group test_fstring test_funcattrs test_generators test_genericalias test_global test_hmac test_importlib test_inspect test_listcomps test_marshal test_monitoring test_opcache test_optimizer test_os test_pdb test_positional_only_arg test_pprint test_pyclbr test_pydoc test_raise test_rlcompleter test_string test_subclassinit test_subprocess test_tempfile test_threading test_trace test_traceback test_type_aliases test_type_annotations test_type_params test_types test_typing test_unittest test_userdict test_xml_etree test_xml_etree_c test_xxlimited

Legend:

• [+] path exists in CPython
• [x] up-to-date, [ ] outdated