code: def get_latent_py_ps_inv():
      ps, py, inv = latent_algebra.compute_ps_py_inv_noise_matrix(s, nm)
  
      return ps, py, inv
  
file_path: cleanlab/tests/test_latent_algebra.py
imports: from cleanlab.internal import latent_algebra
  import numpy
  import pytest
label_desc: Use image node_id 2 for calling a global function with example usage: get_latent_py_ps_inv() and returns: ps,  py,  inv