code: def main():
      run(iaa.AveragePooling)
      run(iaa.MaxPooling)
      run(iaa.MinPooling)
      run(iaa.MedianPooling)
  
imports: from __future__ import print_function, division
  import numpy
  import imgaug
  import imgaug.augmenters
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types