code: def test_find(self):
      for A in self.cases:
          I, J, V = _extract.find(A)
          B = csr_array((V, (I, J)), shape=A.shape)
          assert_equal(A.toarray(), B.toarray())
  
file_path: scipy/scipy/sparse/tests/test_extract.py
imports: from numpy.testing import assert_equal
  from scipy.sparse import csr_matrix, csr_array, sparray
  import numpy
  from scipy.sparse import _extract
label_desc: Use image node_id 2 for calling the TestExtract obj's underlying member method code with example usage: obj.test_find() without return types