code: def setUp(self):
      self.orig_array = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
      self.s2c = matutils.Sparse2Corpus(csc_matrix(self.orig_array))
  
imports: import logging
  import unittest
  import numpy
  from numpy.testing import assert_array_equal
  from scipy import sparse
  from scipy.sparse import csc_matrix
  from scipy.special import psi
  import gensim.matutils
label_desc: Use image node_id 1 for calling the TestSparse2Corpus obj's underlying member method code with example usage: obj.setUp() without return types