docs: def main():
      '''
      Simple examples
      '''
      args = parse_arguments()
      if args.askpass:
          password = getpass.getpass("Password: ")
      else:
          password = None
  
      if args.asksudopass:
          sudo = True
          sudo_pass = getpass.getpass("Sudo password[default ssh password]: ")
          if len(sudo_pass) == 0:
              sudo_pass = password
          sudo_user = 'root'
      else:
          sudo = False
          sudo_pass = None
          sudo_user = None
  
      if not args.username:
          username = getpass.getuser()
      else:
          username = args.username
  
      host_list = args.hosts
      os.environ["ANSIBLE_HOST_KEY_CHECKING"] = "False"
  
      execute_ping(host_list, username, password,
                   sudo=sudo, sudo_user=sudo_user, sudo_pass=sudo_pass)