code: def dense_and_sparse_matrices_are_the_same(self, X, ensured_X):
      self.assertEqual(len(X), ensured_X.shape[0])
      for row in range(len(X)):
          self.assertEqual(len(X[row]), ensured_X.shape[1])
          for col in range(len(X[row])):
              self.assertEqual(X[row][col], ensured_X[row, col])
  
imports: import itertools
  import unittest
  import numpy
  import scipy.sparse
  from builtins import range
  from builtins import zip
  from sklearn.base import BaseEstimator
  from .test_utils import SPARSE_MATRIX_FORMATS
  from ..base import ProblemTransformationBase
label_desc: Use image node_id 3 for calling the ProblemTransformationBaseTest obj's underlying member method code with example usage: obj.dense_and_sparse_matrices_are_the_same(X, ensured_X) without return types