code: def main(unused_argv):
      print("Running histograms demo. Output saving to %s." % LOGDIR)
      run_all(LOGDIR)
      print("Done. Output saved to %s." % LOGDIR)
  
imports: from absl import app
  import tensorflow
label_desc: Use image node_id 3 for calling a global function with example usage: main(unused_argv) without return types