PyO3
Rust bindings for Python. This includes running and interacting with Python code from a Rust binary, as well as writing native Python modules.
A comparison with rust-cpython can be found in the guide.
Usage
PyO3 supports Python 3.5 and up. The minimum required Rust version is 1.37.0-nightly 2019-07-19.
PyPy is also supported (via cpyext) for Python 3.5 only, targeted PyPy version is 7.0.0. Please refer to the guide for installation instruction against PyPy.
You can either write a native Python module in Rust, or use Python from a Rust binary.
However, on some OSs, you need some additional packages. E.g. if you are on Ubuntu 18.04, please run
Using Rust from Python
PyO3 can be used to generate a native Python module.
Cargo.toml
[]
= "string-sum"
= "0.1.0"
= "2018"
[]
= "string_sum"
= ["cdylib"]
[]
= "0.8.2"
= ["extension-module"]
src/lib.rs
use *;
use wrap_pyfunction;
/// Formats the sum of two numbers as string
/// This module is a python module implemented in Rust.
On Windows and Linux, you can build normally with cargo build --release
. On macOS, you need to set additional linker arguments. One option is to compile with cargo rustc --release -- -C link-arg=-undefined -C link-arg=dynamic_lookup
, the other is to create a .cargo/config
with the following content:
[]
= [
"-C", "link-arg=-undefined",
"-C", "link-arg=dynamic_lookup",
]
For developing, you can copy and rename the shared library from the target folder: On MacOS, rename libstring_sum.dylib
to string_sum.so
, on Windows libstring_sum.dll
to string_sum.pyd
and on Linux libstring_sum.so
to string_sum.so
. Then open a Python shell in the same folder and you'll be able to import string_sum
.
To build, test and publish your crate as a Python module, you can use maturin or setuptools-rust. You can find an example for setuptools-rust in examples/word-count, while maturin should work on your crate without any configuration.
Using Python from Rust
Add pyo3
to your Cargo.toml
like this:
[]
= "0.8.2"
Example program displaying the value of sys.version
and the current user name:
use *;
use IntoPyDict;
Our guide has a section with lots of examples about this topic.
Examples and tooling
- examples/word-count Counting the occurrences of a word in a text file
- hyperjson A hyper-fast Python module for reading/writing JSON data using Rust's serde-json
- rust-numpy Rust binding of NumPy C-API
- html-py-ever Using html5ever through kuchiki to speed up html parsing and css-selecting.
- pyo3-built Simple macro to expose metadata obtained with the
built
crate as aPyDict
- point-process High level API for pointprocesses as a Python library
- autopy A simple, cross-platform GUI automation library for Python and Rust.
- Contains an example of building wheels on TravisCI and appveyor using cibuildwheel
- orjson Fast Python JSON library
- inline-python Inline Python code directly in your Rust code
- Rogue-Gym Customizable rogue-like game for AI experiments
- Contains an example of building wheels on Azure Pipelines
- fastuuid Python bindings to Rust's UUID library
- python-ext-wasm Python library to run WebAssembly binaries
- dict-derive Derive FromPyObject to automatically transform Python dicts into Rust structs
License
PyO3 is licensed under the Apache-2.0 license. Python is licensed under the Python License.