code: def naive_whiten(X, w):
      m, n = np.shape(X)
      Xw = np.zeros((m, n))
      for j in range(n):
          Q, _ = np.linalg.qr(X[:, max(j - w, 0) : j])
          Xw[:, j] = X[:, j] - Q @ (Q.T @ X[:, j])
      return Xw.T
  
file_path: hail/hail/python/test/hail/experimental/test_local_whitening.py
imports: import numpy
  from numpy.random import default_rng
  from hail.methods.pca import _make_tsm
  import hail
  from ..helpers import *
label_desc: Use image node_id 1 for calling a global function with example usage: naive_whiten(X, w) and returns: Xw