class_docstr: Multilabel confusion matrix class.
  
  >>> mlcm = MultiLabelCM([{'dog'}, {'cat', 'dog'}], [{'cat'}, {'cat'}])
  >>> mlcm.actual_vector_multihot
  [[0, 1], [1, 1]]
  >>> mlcm.predict_vector_multihot
  [[1, 0], [1, 0]]
docstr: Multilabel confusion matrix object length method.
  
  :return: length as int
docstr_tok: ["Multilabel","confusion","matrix","object","length","method",".",":","return",":","length","as","int"]
code: def __len__(self):
      """
      Multilabel confusion matrix object length method.
  
      :return: length as int
      """
      return len(self.classes)
  
file_path: pycm/pycm/pycm_multilabel_cm.py
imports: from __future__ import division
  from .pycm_error import pycmVectorError, pycmMultiLabelError
  from .pycm_param import *
  from .pycm_obj import ConfusionMatrix
  import numpy
label_desc: Use image node_id 6 for calling the MultiLabelCM obj's underlying member method code with example usage: obj.__len__() and returns: len