python module
Ziyang Hu
2 years ago
parent
e4b9df3f78
commit
d46e1e3141
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/target
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# Byte-compiled / optimized / DLL files
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__pycache__/
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.pytest_cache/
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*.py[cod]
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# C extensions
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*.so
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# Distribution / packaging
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.Python
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.venv/
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env/
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bin/
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build/
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develop-eggs/
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dist/
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eggs/
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lib/
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lib64/
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parts/
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sdist/
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var/
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include/
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man/
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venv/
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*.egg-info/
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.installed.cfg
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*.egg
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# Installer logs
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pip-log.txt
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pip-delete-this-directory.txt
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pip-selfcheck.json
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# Unit test / coverage reports
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htmlcov/
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.tox/
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.coverage
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.cache
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nosetests.xml
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coverage.xml
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# Translations
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*.mo
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# Mr Developer
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.mr.developer.cfg
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.project
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.pydevproject
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# Rope
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.ropeproject
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# Django stuff:
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*.log
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*.pot
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.DS_Store
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# Sphinx documentation
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docs/_build/
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# PyCharm
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.idea/
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# VSCode
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.vscode/
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# Pyenv
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.python-version
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[package]
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name = "cozo_py_module"
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version = "0.1.1"
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edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[lib]
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name = "cozo_py_module"
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crate-type = ["cdylib"]
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[dependencies]
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pyo3 = { version = "0.17.1", features = ["extension-module"] }
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cozo = { version = "0.1.1", path = ".." }
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miette = { version = "=5.3.0", features = ["fancy"] }
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serde_json = "1.0.81"
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[build-system]
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requires = ["maturin>=0.13,<0.14"]
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build-backend = "maturin"
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[project]
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name = "python"
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requires-python = ">=3.7"
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classifiers = [
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"Programming Language :: Rust",
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"Programming Language :: Python :: Implementation :: CPython",
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"Programming Language :: Python :: Implementation :: PyPy",
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]
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@ -0,0 +1,55 @@
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/*
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* Copyright 2022, The Cozo Project Authors. Licensed under MIT/Apache-2.0/BSD-3-Clause.
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*/
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use std::collections::BTreeMap;
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use miette::miette;
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use pyo3::exceptions::PyException;
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use pyo3::prelude::*;
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use cozo::Db;
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#[pyclass(extends=PyException)]
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struct ErrorBridge(cozo::Error);
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trait PyResultExt<T> {
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fn into_py_res(self) -> PyResult<T>;
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}
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impl<T> PyResultExt<T> for miette::Result<T> {
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fn into_py_res(self) -> PyResult<T> {
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match self {
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Ok(t) => Ok(t),
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Err(e) => Err(PyException::new_err(format!("{:?}", e))),
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}
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}
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}
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#[pyclass]
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struct CozoDbPy {
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db: Db,
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}
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#[pymethods]
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impl CozoDbPy {
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#[new]
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#[args(create_if_missing = true, destroy_on_exit = false)]
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fn new(path: &str) -> PyResult<Self> {
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let db = Db::new(path).into_py_res()?;
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Ok(Self { db })
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}
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pub fn run_query(&self, py: Python<'_>, query: &str, params: &str) -> PyResult<String> {
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let params_map: serde_json::Value = serde_json::from_str(params)
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.map_err(|_| miette!("the given params is not valid JSON"))
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.into_py_res()?;
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let params_arg: BTreeMap<_, _> = match params_map {
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serde_json::Value::Object(m) => m.into_iter().collect(),
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_ => Err(miette!("the given params is not a map")).into_py_res()?,
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};
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let ret = py.allow_threads(|| self.db.run_script(query, ¶ms_arg).into_py_res())?;
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Ok(ret.to_string())
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}
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}
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#[pymodule]
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fn cozo_py_module(_py: Python<'_>, m: &PyModule) -> PyResult<()> {
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m.add_class::<CozoDbPy>()?;
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m.add_class::<ErrorBridge>()?;
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Ok(())
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}
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