code: def positive_int(arg):
      val = int(arg)
      if val <= 0:
          raise argparse.ArgumentTypeError(
              "must be positive int: '%s'" % arg
          )
      return val
  
imports: from __future__ import division
  import argparse
  import glob
  import logging
  import os
  import math
  import re
  import shutil
  import libs.common
  from libs.nnet3.train.dropout_schedule import *
  import unittest
label_desc: Use image node_id 26 for calling a global function with example usage: positive_int(arg) and returns: val