class_docstr: Binary confusion matrix class
docstr: Condition positive
  eqv. with support
docstr_tok: ["Condition","positive","eqv",".","with","support"]
code: def P(self):
      """Condition positive
      eqv. with support"""
      return self._df_confusion.loc[self._class(True), :].sum()
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import math
  import numpy
  import pandas
  import collections
  from pandas_ml.confusion_matrix.abstract import ConfusionMatrixAbstract
label_desc: Use image node_id 10 for calling the BinaryConfusionMatrix obj's underlying member method code with example usage: obj.P() and returns: self