code: def ensure_dir(self, dirname):
      if not exists(dirname):
          print("Creating directory: %s" % dirname)
          mkdir(dirname)
  
imports: from os import mkdir
  from os.path import exists, join
  from collections import defaultdict
  import pylab
  from sklearn.datasets import fetch_lfw_people
  from sklearn.impute import IterativeImputer
  import numpy
  from fancyimpute import SimpleFill, IterativeSVD, SoftImpute, BiScaler, KNN
  from fancyimpute.common import masked_mae, masked_mse
label_desc: Use image node_id 2 for calling the ResultsTable obj's underlying member method code with example usage: obj.ensure_dir(dirname) without return types