code: def _missing_warn():
      """Print a warning when called."""
      warnings.warn(
          "One of the clusters is empty. "
          "Re-run kmeans with a different initialization."
      )
  
file_path: catboost/contrib/python/scipy/py3/scipy/cluster/vq.py
imports: import warnings
  import numpy
  from collections import deque
  from scipy._lib._util import _asarray_validated, check_random_state, rng_integers
  from scipy.spatial.distance import cdist
  from .None import _vq
label_desc: Use image node_id 9 for calling a global function with example usage: _missing_warn() without return types