code: def get_model(LAB_DIR):
      
      coeffs = np.load("%s/coeffs.npz" %LAB_DIR)['arr_0']
      scatters = np.load("%s/scatters.npz" %LAB_DIR)['arr_0']
      chisqs = np.load("%s/chisqs.npz" %LAB_DIR)['arr_0']
      pivots = np.load("%s/pivots.npz" %LAB_DIR)['arr_0']
      return coeffs, scatters, chisqs, pivots
docs: Cannon model params