text: import os
  import json
  from hailtop.config import get_deploy_config
  
  
  def init_parser(parser):
      parser.add_argument("namespace", type=str, nargs='?',
                          help="Default namespace.  Show the current configuration if not specified.")
      parser.add_argument("--location", "-l", type=str, default='external',
                          choices=['external', 'gce', 'k8s'],
                          help="Location.  (default: external)")
      parser.add_argument("--override", "-o", type=str, default='',
                          help="List of comma-separated service=namespace overrides.  (default: none)")
  
  
  def main(args):
      if not args.namespace:
          deploy_config = get_deploy_config()
          print(f'  location: {deploy_config.location()}')
          print(f'  default: {deploy_config._default_namespace}')
          if deploy_config._service_namespace:
              print('  overrides:')
              for service, ns in deploy_config._service_namespace.items():
                  print(f'    {service}: {ns}')
          return
  
      override = args.override.split(',')
      override = [o.split('=') for o in override if o]
      service_namespace = {o[0]: o[1] for o in override}
  
      config = {
          'location': args.location,
          'default_namespace': args.namespace,
          'service_namespace': service_namespace
      }
  
      config_file = os.environ.get(
          'HAIL_DEPLOY_CONFIG_FILE', os.path.expanduser('~/.hail/deploy-config.json'))
      with open(config_file, 'w') as f:
          f.write(json.dumps(config))
  