class_docstr: Base object for permutations test
class_docstr_tok: ["Base","object","for","permutations","test"]
docstr: Initial transformation. By default return X.
docstr_tok: ["Initial","transformation",".","By","default","return","X","."]
code: def _initial_transform(self, X):
      """Initial transformation. By default return X."""
      return X
  
imports: import sys
  import math
  import numpy
  from .utils.utils import check_version
  from .utils.distance import distance, pairwise_distance
  from .utils.mean import mean_covariance
  from .classification import MDM, _check_metric
label_desc: Use image node_id 3 for calling the BasePermutation obj's underlying member method code with example usage: obj._initial_transform(X) and returns: X