code: def main():
      options = parse_cmd_line()
  
      # Check that credentials are specified to access the datastore.
      if not os.environ.get("GOOGLE_APPLICATION_CREDENTIALS"):
          raise ValueError(
              "GOOGLE_APPLICATION_CREDENTIALS env. var. is not set."
          )
  
      upload_benchmark_files(options)
  
file_path: tensorflow/tensorflow/tools/test/upload_test_benchmarks.py
imports: import argparse
  import datetime
  import fcntl
  import json
  import os
  import shutil
  from google.cloud import datastore
label_desc: Use image node_id 10 for calling a global function with example usage: main() without return types