code: def sparse_nn_data():
      return sparse.random(1000, 50, density=0.5, format="csr")
  
imports: import pytest
  import numpy
  from scipy import sparse
  from sklearn.datasets import load_iris
  from umap import UMAP, AlignedUMAP
label_desc: Use image node_id 7 for calling a global function with example usage: sparse_nn_data() and returns: sparse