Init maturin project

Cargo.lock

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Cargo.toml

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+[package]
+name = "rust-hashlib-testing"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[lib]
+name = "rust_hashlib_testing"
+crate-type = ["cdylib"]
+
+[dependencies]
+pyo3 = { version = "0.16.5", features = ["extension-module"] }

pyproject.toml

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+build-backend = "maturin"
+
+[project]
+name = "rust-hashlib-testing"
+requires-python = ">=3.7"
+classifiers = [
+    "Programming Language :: Rust",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+]
+

src/lib.rs

@@ -0,0 +1,15 @@
+
+use pyo3::prelude::*;
+
+/// Formats the sum of two numbers as string.
+#[pyfunction]
+fn sum_as_string(a: usize, b: usize) -> PyResult<String> {
+    Ok((a + b).to_string())
+}
+
+/// A Python module implemented in Rust.
+#[pymodule]
+fn rust_hashlib_testing(_py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_function(wrap_pyfunction!(sum_as_string, m)?)?;
+    Ok(())
+}