code: def test_tud():
      # Edge labels + edge attributes
      dataset = datasets.TUDataset("BZR_MD", clean=False)
      dl = DisjointLoader(dataset, batch_size=batch_size)
      dl.__next__()
  
      bl = BatchLoader(dataset, batch_size=batch_size)
      bl.__next__()
  
      # Node labels + node attributes + clean version
      dataset = datasets.TUDataset("ENZYMES", clean=True)
      dl = DisjointLoader(dataset, batch_size=batch_size)
      dl.__next__()
  
      bl = BatchLoader(dataset, batch_size=batch_size)
      bl.__next__()
  
      datasets.TUDataset.available_datasets
  
file_path: spektral/tests/test_datasets.py
imports: from spektral import datasets
  from spektral.data import BatchLoader, DisjointLoader, SingleLoader
label_desc: Use image node_id 8 for calling a global function with example usage: test_tud() without return types