class_docstr: Base class for mixture models.
  
  This abstract class specifies an interface for all mixture classes and
  provides basic common methods for mixture models.
code: def _set_parameters(self, params):
      pass
  
imports: from __future__ import print_function
  import warnings
  from abc import ABCMeta, abstractmethod
  from time import time
  import numpy
  from ..None import cluster
  from ..base import BaseEstimator
  from ..base import DensityMixin
  from ..externals import six
  from ..exceptions import ConvergenceWarning
  from ..utils import check_array, check_random_state
  from ..utils.extmath import logsumexp
label_desc: Use image node_id 11 for calling the BaseMixture obj's underlying member method code with example usage: obj._set_parameters(params) without return types