code: def main():
      """Main function"""
  
      if ARGS.type == "copy":
          generate_fn = make_copy
      elif ARGS.type == "reverse":
          generate_fn = make_reverse
  
      # Generate dataset
      examples = list(
          generate_fn(ARGS.num_examples, ARGS.min_len, ARGS.max_len)
      )
      try:
          os.makedirs(ARGS.output_dir)
      except OSError:
          if not os.path.isdir(ARGS.output_dir):
              raise
  
      # Write train data
      train_sources, train_targets = zip(*examples)
      write_parallel_text(train_sources, train_targets, ARGS.output_dir)
  
file_path: seq2seq/bin/tools/generate_toy_data.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import argparse
  import os
  import numpy
  import io
label_desc: Use image node_id 4 for calling a global function with example usage: main() without return types