code: def test_viewer_load_np(self):
      table = Table({"a": np.arange(1, 100)})
      viewer = PerspectiveViewer()
      viewer.load(table)
      assert viewer.columns == ["a"]
  
imports: import numpy
  import pandas
  from perspective import PerspectiveViewer, Table
label_desc: Use image node_id 10 for calling the TestViewer obj's underlying member method code with example usage: obj.test_viewer_load_np() without return types