code: def test_causal_discovery_using_generator() -> None:
      nnodes = 13
      npoints = 55
      func = core.CausalDiscovery(
          generator="acylicgraph", npoints=npoints, nodes=nnodes
      )
      assert func._nvars == nnodes
      assert func._data.shape == (npoints, nnodes)
      assert func.graph_score(func._ground_truth_graph) == 1
  
imports: import numpy
  import nevergrad
  from .None import core
label_desc: Use image node_id 3 for calling a global function with example usage: test_causal_discovery_using_generator() without return types