code: def main():
      parser = argparse.ArgumentParser()
  
      parser.add_argument(
          "-i",
          "--image",
          help="(string) Name of the testing image",
          type=str,
          default=None,
      )
      parser.add_argument(
          "-mb",
          "--memory_backend",
          help="(string) Name of the memory backend",
          type=str,
          default="redispubsub",
      )
      parser.add_argument(
          "-e",
          "--endpoint",
          help="(string) Name of the s3 endpoint",
          type=str,
          default="s3.amazonaws.com",
      )
      parser.add_argument(
          "-cr",
          "--creds_file",
          help="(string) Path of the s3 creds file",
          type=str,
          default=".aws_creds",
      )
      parser.add_argument(
          "-b",
          "--bucket",
          help="(string) Name of the bucket for s3",
          type=str,
          default=None,
      )
  
      args = parser.parse_args()
  
      if not args.bucket:
          print("bucket_name required for s3")
          exit(1)
      if not os.environ.get("AWS_ACCESS_KEY_ID") or not os.environ.get(
          "AWS_SECRET_ACCESS_KEY"
      ):
          print(
              "AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY env vars need to be set"
          )
          exit(1)
  
      config_file = "./tmp.cred"
      generate_config(
          args.image,
          args.memory_backend,
          args.endpoint,
          args.bucket,
          args.creds_file,
          config_file,
      )
      for command in get_tests():
          test_dc(
              command,
              args.image,
              args.memory_backend,
              args.endpoint,
              args.bucket,
              args.creds_file,
              config_file,
          )
  
file_path: coach/rl_coach/tests/test_dist_coach.py
imports: from configparser import ConfigParser
  import pytest
  import argparse
  import os
  from rl_coach.coach import CoachLauncher
  import sys
  from minio import Minio
label_desc: Use image node_id 6 for calling a global function with example usage: main() without return types