text: #!/usr/bin/env python
  # Copyright 2015-2016 Yelp Inc.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  import logging
  
  from paasta_tools.api import client
  from paasta_tools.cli.utils import figure_out_service_name
  from paasta_tools.cli.utils import lazy_choices_completer
  from paasta_tools.cli.utils import list_instances
  from paasta_tools.utils import _log_audit
  from paasta_tools.utils import list_clusters
  from paasta_tools.utils import list_services
  from paasta_tools.utils import paasta_print
  
  
  log = logging.getLogger(__name__)
  
  
  def add_subparser(subparsers):
      autoscale_parser = subparsers.add_parser(
          'autoscale',
          help="Manually scale a service up and down manually, bypassing the normal autoscaler",
      )
  
      autoscale_parser.add_argument(
          '-s', '--service',
          help="Service that you want to stop. Like 'example_service'.",
      ).completer = lazy_choices_completer(list_services)
      autoscale_parser.add_argument(
          '-i', '--instance',
          help="Instance of the service that you want to stop. Like 'main' or 'canary'.",
          required=True,
      ).completer = lazy_choices_completer(list_instances)
      autoscale_parser.add_argument(
          '-c', '--cluster',
          help="The PaaSTA cluster that has the service instance you want to stop. Like 'norcal-prod'.",
          required=True,
      ).completer = lazy_choices_completer(list_clusters)
      autoscale_parser.add_argument(
          '--set',
          help="Set the number to scale to. Must be an Int.",
          type=int,
      )
      autoscale_parser.set_defaults(command=paasta_autoscale)
  
  
  def paasta_autoscale(args):
      log.setLevel(logging.DEBUG)
      service = figure_out_service_name(args)
      api = client.get_paasta_api_client(cluster=args.cluster, http_res=True)
      if not api:
          paasta_print('Could not connect to paasta api. Maybe you misspelled the cluster?')
          return 1
  
      if args.set is None:
          log.debug("Getting the current autoscaler count...")
          res, http = api.autoscaler.get_autoscaler_count(service=service, instance=args.instance).result()
      else:
          log.debug(f"Setting desired instances to {args.set}.")
          body = {'desired_instances': int(args.set)}
          res, http = api.autoscaler.update_autoscaler_count(
              service=service, instance=args.instance, json_body=body,
          ).result()
  
          _log_audit(
              action='manual-scale',
              action_details=body,
              service=service,
              instance=args.instance,
              cluster=args.cluster,
          )
  
      log.debug(f"Res: {res} Http: {http}")
      print(res["desired_instances"])
      return 0
  