code: def test_some_fp_at_10(self):
      y_true = np.array([0, 0, 0, 0, 0, 0, 0, 1, 1, 1])
      y_score = np.array(
          [1.0, 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1]
      )
      fps = fp_at(y_true, y_score, top_proportion=0.1)
      self.assertEqual(fps, 1)
  
imports: from unittest import TestCase
  from sklearn_evaluation.metrics import precision_at, labels_at, tp_at, fp_at
  import numpy
  from numpy import nan
label_desc: Use image node_id 7 for calling the Test_fp_at obj's underlying member method code with example usage: obj.test_some_fp_at_10() without return types