Working example

.gitignore

@@ -19,3 +19,8 @@ target
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
+
+
+# Added by cargo
+
+/target

Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "flux-rt"
+version = "0.1.0"

Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "flux-rt"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

bro.py

@@ -0,0 +1,4 @@
+def hello():
+    print("Hello, bro!")
+
+hello()

build.rs

@@ -0,0 +1,13 @@
+fn main() {
+    let lib_dir = std::process::Command::new("python3")
+        .arg("-c")
+        .arg("import sysconfig; print(sysconfig.get_config_var('LIBDIR'))")
+        .output()
+        .expect("failed to run python3")
+        .stdout;
+
+    let lib_dir = String::from_utf8(lib_dir).unwrap();
+    println!("cargo:rustc-link-search=native={}", lib_dir.trim());
+
+    println!("cargo:rustc-link-lib=python3.11");
+}

src/lib.rs

@@ -0,0 +1,21 @@
+use std::{ffi::CString, fs, path::Path};
+
+#[link(name = "python3.13")]
+extern "C" {
+    fn Py_Initialize();
+    fn PyRun_SimpleString(command: *const i8) -> i32;
+    fn Py_Finalize();
+}
+
+pub fn run_py(path: &Path) {
+    let code = fs::read_to_string(path).expect("Failed to read python script");
+
+    unsafe {
+        Py_Initialize();
+
+        let code = CString::new(code.as_str()).unwrap();
+        PyRun_SimpleString(code.as_ptr());
+
+        Py_Finalize();
+    }
+}

src/main.rs

@@ -0,0 +1,6 @@
+use std::path::Path;
+use flux_rt::run_py;
+
+fn main() {
+    run_py(Path::new("bro.py"));
+}