* Fix test_import: import machinery and errors
- Emit IMPORT_FROM instead of LOAD_ATTR for `import a.b.c as m`
- Add "partially initialized module" error for circular imports
- Add "cannot access submodule" error for initializing submodules
- Implement script shadowing detection with "consider renaming" hint
- Detect user scripts shadowing stdlib/third-party modules
- Compute original sys.path[0] from sys.argv[0]
- Check sys.stdlib_module_names for stdlib detection
- Respect safe_path setting
- Implement _imp._fix_co_filename for code source_path rewriting
- Add data parameter to _imp.get_frozen_object with marshal deser
- Fix import_from: check __spec__.has_location before using origin
- Set ImportError.path attribute on import failures
- Fix import_star error messages for non-str __all__/__dict__ items
- Always call builtins.__import__ in import_inner
* Propagate __bool__ errors from fromlist in import
Previously, try_to_bool errors were silently swallowed via .ok(),
causing fromlist with broken __bool__ to default to false.
* Add host_env feature for sandbox isolation
Introduce a `host_env` feature flag that gates all host environment
access (filesystem, network, signals, processes). When disabled,
the VM operates in sandbox mode:
- _io module always available; FileIO gated by host_env
- SandboxStdio provides lightweight stdin/stdout/stderr via Rust std::io
- BytesIO/StringIO/BufferedIO/TextIOWrapper work without host_env
- open() returns UnsupportedOperation in sandbox
- stdlib modules (os, socket, signal, etc.) gated by host_env
- CI checks both host_env ON and OFF builds
* Auto-format: ruff check --select I --fix
---------
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
* Generate optimized oparg enums
* No need to match on 255
* Remove `num_enum` crate from `compiler-core`
* Update `Cargo.lock`
* macro fmt
* Rename macro vars
* Match without `,`
* Support alternative values
* Fix alternatives
* Improve docs
* Add const assert
* Don't use `as u32`
* Make only ComparisonOperator unoptimized
* Fix test
* cleanup
* All opargs are optimized
* Remove comment
* Update codeop from v3.14.3
* Fix traceback, syntax errors, and exception handling
- Improve unclosed bracket detection with "'(' was never closed" message
- Fix IndentationError location to point to end of line
- Implement frame.clear() with proper checks for executing/suspended frames
- Fix exception context chaining for propagated exceptions
- Add traceback.__dir__() and prevent tb_next deletion
- Fix subscript operation source range restoration in compiler
- Change "duplicate parameter" to "duplicate argument" error message
- Refactor duplicate code in asyncgenerator.rs and frame.rs
---------
Co-authored-by: CPython Developers <>
- Add already_warned() with filter version tracking
- Add type validation for _defaultaction and _onceregistry
- Use direct function names for _warnings pyattr/pyfunction
- Route stdlib::warnings::warn through warn::warn
- Remove spurious EncodingWarning from TextIOWrapper
- Clean up comments and simplify check_matched error handling
- Remove expectedFailure from 3 passing test_warnings tests
- Extract singleton_node_to_object() helper for operator/context nodes
- Rename PY_COMPILE_FLAG_AST_ONLY to PY_CF_ONLY_AST
- Rename populate_match_args_and_attributes to populate_repr
- Set _attributes in impl_base_node! no-args variant
- Simplify ast_reduce with .is_some() instead of drop(value)
- Remove _ prefix from used parameters across ast/ files
- Fix slot_new comment to explain why slot_init is called
CPython Developers