Jeong, YunWon
1b620e5d0a
* Remove intermediate Vec allocation in unpack_sequence fast path Push elements directly from tuple/list slice in reverse order instead of cloning into a temporary Vec first. * Use read-only atomic load before swap in check_signals Add Relaxed load guard before the Acquire swap to avoid cache-line invalidation on every instruction dispatch when no signal is pending. * Cache builtins downcast in ExecutingFrame for LOAD_GLOBAL Pre-compute builtins.downcast_ref::<PyDict>() at frame entry and reuse the cached reference in load_global_or_builtin and LoadBuildClass. Also add get_chain_exact to skip redundant exact_dict type checks. * Add number Add slot to PyStr for direct str+str dispatch binary_op1 can now resolve str+str addition directly via the number slot instead of falling through to the sequence concat path. * Guard FastLocals access in locals() with try_lock on state mutex Address CodeRabbit review: f_locals() could access fastlocals without synchronization when called from another thread. Use try_lock on the state mutex so concurrent access is properly serialized. * Use exact type check for builtins_dict cache downcast_ref::<PyDict>() matches dict subclasses, causing get_chain_exact to bypass custom __getitem__ overrides. Use downcast_ref_if_exact to only fast-path exact dict types. * Consolidate with_recursion in _cmp to single guard Move the recursion depth check to wrap the entire _cmp body instead of each individual call_cmp direction, reducing Cell read/write pairs and scopeguard overhead per comparison. * Add opcode-level fast paths for FOR_ITER, COMPARE_OP, BINARY_OP - FOR_ITER: detect PyRangeIterator and bypass generic iterator protocol (atomic slot load + indirect call) - COMPARE_OP: inline int/float comparison for exact types, skip rich_compare dispatch and with_recursion overhead - BINARY_OP: inline int add/sub with i64 checked arithmetic to avoid BigInt heap allocation and binary_op1 dispatch * Also check globals is exact dict for LOAD_GLOBAL fast path get_chain_exact bypasses __missing__ on dict subclasses. Move get_chain_exact to PyExact<PyDict> impl with debug_assert, and have get_chain delegate to it. Store builtins_dict as Option<&PyExact<PyDict>> to enforce exact type at compile time. Use PyRangeIterator::next_fast() instead of pub(crate) fields. Fix comment style issues.
RustPython
A Python-3 (CPython >= 3.14.0) Interpreter written in Rust 🐍 😱 🤘.
Usage
Check out our online demo running on WebAssembly.
RustPython requires Rust latest stable version (e.g 1.67.1 at February 7th 2023). If you don't currently have Rust installed on your system you can do so by following the instructions at rustup.rs.
To check the version of Rust you're currently running, use rustc --version. If you wish to update,
rustup update stable will update your Rust installation to the most recent stable release.
To build RustPython locally, first, clone the source code:
git clone https://github.com/RustPython/RustPython
RustPython uses symlinks to manage python libraries in Lib/. If on windows, running the following helps:
git config core.symlinks true
Then you can change into the RustPython directory and run the demo (Note: --release is
needed to prevent stack overflow on Windows):
$ cd RustPython
$ cargo run --release demo_closures.py
Hello, RustPython!
Or use the interactive shell:
$ cargo run --release
Welcome to rustpython
>>>>> 2+2
4
NOTE: For windows users, please set RUSTPYTHONPATH environment variable as Lib path in project directory.
(e.g. When RustPython directory is C:\RustPython, set RUSTPYTHONPATH as C:\RustPython\Lib)
You can also install and run RustPython with the following:
$ cargo install --git https://github.com/RustPython/RustPython rustpython
$ rustpython
Welcome to the magnificent Rust Python interpreter
>>>>>
venv
Because RustPython currently doesn't provide a well-packaged installation, using venv helps to use pip easier.
$ rustpython -m venv <your_env_name>
$ . <your_env_name>/bin/activate
$ python # now `python` is the alias of the RustPython for the new env
PIP
If you'd like to make https requests, you can enable the ssl feature, which
also lets you install the pip package manager. Note that on Windows, you may
need to install OpenSSL, or you can enable the ssl-vendor feature instead,
which compiles OpenSSL for you but requires a C compiler, perl, and make.
OpenSSL version 3 is expected and tested in CI. Older versions may not work.
Once you've installed rustpython with SSL support, you can install pip by running:
cargo install --git https://github.com/RustPython/RustPython
rustpython --install-pip
You can also install RustPython through the conda package manager, though
this isn't officially supported and may be out of date:
conda install rustpython -c conda-forge
rustpython
SSL provider
For HTTPS requests, ssl-rustls feature is enabled by default. You can replace it with ssl-openssl feature if your environment requires OpenSSL.
Note that to use OpenSSL on Windows, you may need to install OpenSSL, or you can enable the ssl-vendor feature instead,
which compiles OpenSSL for you but requires a C compiler, perl, and make.
OpenSSL version 3 is expected and tested in CI. Older versions may not work.
WASI
You can compile RustPython to a standalone WebAssembly WASI module so it can run anywhere.
Build
cargo build --target wasm32-wasip1 --no-default-features --features freeze-stdlib,stdlib --release
Run by wasmer
wasmer run --dir `pwd` -- target/wasm32-wasip1/release/rustpython.wasm `pwd`/extra_tests/snippets/stdlib_random.py
Run by wapm
$ wapm install rustpython
$ wapm run rustpython
>>>>> 2+2
4
Building the WASI file
You can build the WebAssembly WASI file with:
cargo build --release --target wasm32-wasip1 --features="freeze-stdlib"
Note: we use the
freeze-stdlibto include the standard library inside the binary. You also have to run oncerustup target add wasm32-wasip1.
JIT (Just in time) compiler
RustPython has a very experimental JIT compiler that compile python functions into native code.
Building
By default the JIT compiler isn't enabled, it's enabled with the jit cargo feature.
cargo run --features jit
This requires autoconf, automake, libtool, and clang to be installed.
Using
To compile a function, call __jit__() on it.
def foo():
a = 5
return 10 + a
foo.__jit__() # this will compile foo to native code and subsequent calls will execute that native code
assert foo() == 15
Embedding RustPython into your Rust Applications
Interested in exposing Python scripting in an application written in Rust,
perhaps to allow quickly tweaking logic where Rust's compile times would be inhibitive?
Then examples/hello_embed.rs and examples/mini_repl.rs may be of some assistance.
Disclaimer
RustPython is in development, and while the interpreter certainly can be used in interesting use cases like running Python in WASM and embedding into a Rust project, do note that RustPython is not totally production-ready.
Contribution is more than welcome! See our contribution section for more information on this.
Conference videos
Checkout those talks on conferences:
Use cases
Although RustPython is a fairly young project, a few people have used it to make cool projects:
- GreptimeDB: an open-source, cloud-native, distributed time-series database. Using RustPython for embedded scripting.
- pyckitup: a game engine written in rust.
- Robot Rumble: an arena-based AI competition platform
- Ruff: an extremely fast Python linter, written in Rust
Goals
- Full Python-3 environment entirely in Rust (not CPython bindings)
- A clean implementation without compatibility hacks
Documentation
Currently along with other areas of the project, documentation is still in an early phase.
You can read the online documentation for the latest release, or the user guide.
You can also generate documentation locally by running:
cargo doc # Including documentation for all dependencies
cargo doc --no-deps --all # Excluding all dependencies
Documentation HTML files can then be found in the target/doc directory or you can append --open to the previous commands to
have the documentation open automatically on your default browser.
For a high level overview of the components, see the architecture document.
Contributing
Contributions are more than welcome, and in many cases we are happy to guide contributors through PRs or on Discord. Please refer to the development guide as well for tips on developments.
With that in mind, please note this project is maintained by volunteers, some of the best ways to get started are below:
Most tasks are listed in the issue tracker. Check issues labeled with good first issue if you wish to start coding.
To enhance CPython compatibility, try to increase unittest coverage by checking this article: How to contribute to RustPython by CPython unittest
Another approach is to checkout the source code: builtin functions and object methods are often the simplest and easiest way to contribute.
You can also simply run python -I scripts/whats_left.py to assist in finding any unimplemented
method.
Compiling to WebAssembly
Community
Chat with us on Discord.
Code of conduct
Our code of conduct can be found here.
Credit
The initial work was based on windelbouwman/rspython and shinglyu/RustPython
Links
These are some useful links to related projects:
- https://github.com/ProgVal/pythonvm-rust
- https://github.com/shinglyu/RustPython
- https://github.com/windelbouwman/rspython
License
This project is licensed under the MIT license. Please see the LICENSE file for more details.
The project logo is licensed under the CC-BY-4.0 license. Please see the LICENSE-logo file for more details.