code: def test_min_weight_full_matching_trivial_graph(num_rows, num_cols):
      biadjacency_matrix = csr_matrix((num_cols, num_rows))
      row_ind, col_ind = min_weight_full_bipartite_matching(
          biadjacency_matrix
      )
      assert len(row_ind) == 0
      assert len(col_ind) == 0
  
imports: from itertools import product
  import numpy
  from numpy.testing import assert_array_equal, assert_equal
  import pytest
  from scipy.sparse import csr_matrix, coo_matrix, diags
  from scipy.sparse.csgraph import maximum_bipartite_matching, min_weight_full_bipartite_matching
label_desc: Use image node_id 12 for calling a global function with example usage: test_min_weight_full_matching_trivial_graph(num_rows, num_cols) without return types