Struct PyRandom 

pub struct PyRandom { /* private fields */ }

A CPython-compatible random.Random instance: MT19937 state plus the pure-Python wrapper logic (_randbelow, sample, shuffle) from Lib/random.py.

Implementations

impl PyRandom

pub fn new(seed: u64) -> Self

pub fn randbelow(&mut self, n: u64) -> u64

Random._randbelow_with_getrandbits: rejection-sampled getrandbits.

pub fn sample_indices(&mut self, n: usize, k: usize) -> Vec<usize>

Random.sample(range(n), k) restricted to integer populations 0..n (the only case needed here — feature/class/row indices), returning the sampled indices in draw order.

pub fn sample<T: Clone>(&mut self, population: &[T], k: usize) -> Vec<T>

Random.sample(population, k) for an arbitrary slice, via sample_indices.

pub fn shuffle<T>(&mut self, x: &mut [T])

Random.shuffle(x): in-place Fisher-Yates via _randbelow.