code: def objective(trial):
      iris = sklearn.datasets.load_iris()
      x, y = iris.data, iris.target
  
      svc_c = trial.suggest_float("svc_c", 1e-10, 1e10, log=True)
      clf = sklearn.svm.SVC(C=svc_c)
      accuracy = sklearn.model_selection.cross_val_score(
          clf, x, y
      ).mean()
  
      trial.set_user_attr("accuracy", accuracy)
  
      return 1.0 - accuracy
  
imports: import sklearn.datasets
  import sklearn.model_selection
  import sklearn.svm
  import optuna
label_desc: Use image node_id 1 for calling a global function with example usage: objective(trial) and returns: unknown