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Merged
youknowone merged 2 commits into from
Jan 14, 2026
Merged

Update AI docs #6728

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c7c874f
update copilot instructions
youknowone Jan 13, 2026
b22176f
upgrade-pylib command
youknowone Jan 14, 2026
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32 changes: 32 additions & 0 deletions .claude/commands/upgrade-pylib.md
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# Upgrade Python Library from CPython

Upgrade a Python standard library module from CPython to RustPython.

## Arguments
- `$ARGUMENTS`: Library name to upgrade (e.g., `inspect`, `asyncio`, `json`)

## Steps

1. **Delete existing library in Lib/**
- If `Lib/$ARGUMENTS.py` exists, delete it
- If `Lib/$ARGUMENTS/` directory exists, delete it

2. **Copy from cpython/Lib/**
- If `cpython/Lib/$ARGUMENTS.py` exists, copy it to `Lib/$ARGUMENTS.py`
- If `cpython/Lib/$ARGUMENTS/` directory exists, copy it to `Lib/$ARGUMENTS/`

3. **Upgrade tests**
- Run: `python lib_updater.py --quick-upgrade cpython/Lib/test/test_$ARGUMENTS`
- This will update the test files with appropriate RustPython markers

## Example Usage
```
/upgrade-pylib inspect
/upgrade-pylib json
/upgrade-pylib asyncio
```

## Notes
- The cpython/ directory should contain the CPython source that we're syncing from
- lib_updater.py handles adding `# TODO: RUSTPYTHON` markers and `@unittest.expectedFailure` decorators
- After upgrading, you may need to run tests to verify: `cargo run --release -- -m test test_$ARGUMENTS`
15 changes: 13 additions & 2 deletions .github/copilot-instructions.md
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Expand Up @@ -87,18 +87,23 @@ rm -r target/debug/build/rustpython-* && find . | grep -E "\.pyc$" | xargs rm -r
# Run Rust unit tests
cargo test --workspace --exclude rustpython_wasm

# Run Python snippets tests
# Run Python snippets tests (debug mode recommended for faster compilation)
cargo run -- extra_tests/snippets/builtin_bytes.py

# Run all Python snippets tests with pytest
cd extra_tests
pytest -v

# Run the Python test module
# Run the Python test module (release mode recommended for better performance)
cargo run --release -- -m test ${TEST_MODULE}
cargo run --release -- -m test test_unicode # to test test_unicode.py

# Run the Python test module with specific function
cargo run --release -- -m test test_unicode -k test_unicode_escape
```

**Note**: For `extra_tests/snippets` tests, use debug mode (`cargo run`) as compilation is faster. For `unittest` (`-m test`), use release mode (`cargo run --release`) for better runtime performance.

### Determining What to Implement

Run `./whats_left.py` to get a list of unimplemented methods, which is helpful when looking for contribution opportunities.
Expand Down Expand Up @@ -184,6 +189,12 @@ cargo build --target wasm32-wasip1 --no-default-features --features freeze-stdli
cargo run --features jit
```

### Building venvlauncher (Windows)

See DEVELOPMENT.md "CPython Version Upgrade Checklist" section.

**IMPORTANT**: All 4 venvlauncher binaries use the same source code. Do NOT add multiple `[[bin]]` entries to Cargo.toml. Build once and copy with different names.

## Test Code Modification Rules

**CRITICAL: Test code modification restrictions**
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