code: def _error(true, pred):
      return 1.0 - accuracy_score(true, pred, method="standard")
  
imports: import numpy
  from mlxtend.evaluate.accuracy import accuracy_score
  from mlxtend.evaluate.confusion_matrix import confusion_matrix
label_desc: Use image node_id 1 for calling a global function with example usage: _error(true, pred) and returns: unknown