code: def test_degree_power():
      _check_op(convolution.degree_power, adj, k=3)
      _check_op(convolution.degree_power, adj, k=-1.0)
      _check_op(convolution.degree_power, adj, k=-0.5)
  
imports: import networkx
  import numpy
  import pytest
  import scipy.sparse
  from spektral.utils import convolution
label_desc: Use image node_id 6 for calling a global function with example usage: test_degree_power() without return types