Function measure_python 

pub fn measure_python(
    root: &Path,
    exempt: &[String],
    exempt_lines: &BTreeMap<String, BTreeSet<u32>>,
    base: Option<&str>,
) -> Result<Measurement>

Run the bundled Python mutation adapter over the project at root and return the Measurement — the Python arm, parity with measure_rust. maturin ships the binary directly, so it invokes the adapter as a module resolved from the wheel’s own environment.