code: def get_means():
      means = [
          "ale",
          "euclid",
          "harmonic",
          "identity",
          "kullback_sym",
          "logdet",
          "logeuclid",
          "riemann",
          "wasserstein",
      ]
      for mean in means:
          yield mean
  
file_path: pyRiemann/tests/conftest.py
imports: import pytest
  import numpy
  from functools import partial
  from pyriemann.datasets import make_matrices, make_masks
label_desc: Use image node_id 11 for calling a global function with example usage: get_means() without return types