code: def false_positives(self, idx):
      return self.sum_predictions[idx] - self.true_positives(idx)
  
imports: import logging
  from collections import OrderedDict
  import numpy
  from sklearn import metrics
  from sklearn.metrics import confusion_matrix
label_desc: Use image node_id 5 for calling the ConfusionMatrix obj's underlying member method code with example usage: obj.false_positives(idx) and returns: unknown