code: def mix(request):
      """
      Fixture returning True or False, determining whether to operate
      op(sparse, dense) instead of op(sparse, sparse)
      """
      return request.param
  
imports: import operator
  import numpy
  import pytest
  import pandas
  from pandas import SparseDtype
  import pandas._testing
  from pandas.core.arrays.sparse import SparseArray
label_desc: Use image node_id 2 for calling a global function with example usage: mix(request) and returns: request