code: def test_norm(A):
      C = spla.norm(A)
      npt.assert_allclose(C, np.linalg.norm(A.todense()))
  
imports: import pytest
  import numpy
  import numpy.testing
  import scipy.sparse
  import scipy.sparse.linalg
  from scipy._lib._util import VisibleDeprecationWarning
label_desc: Use image node_id 22 for calling a global function with example usage: test_norm(A) without return types