code: def __init__(self, max_leaf_nodes=None, impurity_func="gini"):
      self.root = None
      self.max_leaf_nodes = max_leaf_nodes
      self.impurity_func = impurity_func
  
imports: from sklearn.tree._tree import Tree
  from sklearn.tree import DecisionTreeClassifier, DecisionTreeRegressor
  from sklearn.base import ClassifierMixin, RegressorMixin
  from sklearn import __version__
  from collections import namedtuple
  import pandas
  import numpy
  from collections import namedtuple
  from sklearn import __version__
  from sklearn.base import ClassifierMixin, RegressorMixin
  from sklearn.tree import DecisionTreeClassifier, DecisionTreeRegressor
  from sklearn.tree._tree import Tree
  import imodels.util.tree
label_desc: Use image node_id 1 to create a new CustomDecisionTreeClassifier object from inherited base classes: ClassifierMixin with example: obj = CustomDecisionTreeClassifier(max_leaf_nodes, impurity_func)