text: # -*- coding: utf-8 -*-
  #
  # Copyright 2018 Google LLC
  #
  # 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
  #
  #     https://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.
  """Accesses the google.cloud.vision.v1p2beta1 ImageAnnotator API."""
  
  import pkg_resources
  import warnings
  
  from google.oauth2 import service_account
  import google.api_core.gapic_v1.client_info
  import google.api_core.gapic_v1.config
  import google.api_core.gapic_v1.method
  import google.api_core.grpc_helpers
  import google.api_core.operation
  from google.api_core import operations_v1
  import grpc
  
  from google.cloud.vision_v1p2beta1.gapic import enums
  from google.cloud.vision_v1p2beta1.gapic import image_annotator_client_config
  from google.cloud.vision_v1p2beta1.gapic.transports import image_annotator_grpc_transport
  from google.cloud.vision_v1p2beta1.proto import image_annotator_pb2
  from google.cloud.vision_v1p2beta1.proto import image_annotator_pb2_grpc
  from google.longrunning import operations_pb2
  
  _GAPIC_LIBRARY_VERSION = pkg_resources.get_distribution(
      'google-cloud-vision', ).version
  
  
  class ImageAnnotatorClient(object):
      """
      Service that performs Google Cloud Vision API detection tasks over client
      images, such as face, landmark, logo, label, and text detection. The
      ImageAnnotator service returns detected entities from the images.
      """
  
      SERVICE_ADDRESS = 'vision.googleapis.com:443'
      """The default address of the service."""
  
      # The name of the interface for this client. This is the key used to
      # find the method configuration in the client_config dictionary.
      _INTERFACE_NAME = 'google.cloud.vision.v1p2beta1.ImageAnnotator'
  
      @classmethod
      def from_service_account_file(cls, filename, *args, **kwargs):
          """Creates an instance of this client using the provided credentials
          file.
  
          Args:
              filename (str): The path to the service account private key json
                  file.
              args: Additional arguments to pass to the constructor.
              kwargs: Additional arguments to pass to the constructor.
  
          Returns:
              ImageAnnotatorClient: The constructed client.
          """
          credentials = service_account.Credentials.from_service_account_file(
              filename)
          kwargs['credentials'] = credentials
          return cls(*args, **kwargs)
  
      from_service_account_json = from_service_account_file
  
      def __init__(self,
                   transport=None,
                   channel=None,
                   credentials=None,
                   client_config=image_annotator_client_config.config,
                   client_info=None):
          """Constructor.
  
          Args:
              transport (Union[~.ImageAnnotatorGrpcTransport,
                      Callable[[~.Credentials, type], ~.ImageAnnotatorGrpcTransport]): A transport
                  instance, responsible for actually making the API calls.
                  The default transport uses the gRPC protocol.
                  This argument may also be a callable which returns a
                  transport instance. Callables will be sent the credentials
                  as the first argument and the default transport class as
                  the second argument.
              channel (grpc.Channel): DEPRECATED. A ``Channel`` instance
                  through which to make calls. This argument is mutually exclusive
                  with ``credentials``; providing both will raise an exception.
              credentials (google.auth.credentials.Credentials): The
                  authorization credentials to attach to requests. These
                  credentials identify this application to the service. If none
                  are specified, the client will attempt to ascertain the
                  credentials from the environment.
                  This argument is mutually exclusive with providing a
                  transport instance to ``transport``; doing so will raise
                  an exception.
              client_config (dict): DEPRECATED. A dictionary of call options for
                  each method. If not specified, the default configuration is used.
              client_info (google.api_core.gapic_v1.client_info.ClientInfo):
                  The client info used to send a user-agent string along with
                  API requests. If ``None``, then default info will be used.
                  Generally, you only need to set this if you're developing
                  your own client library.
          """
          # Raise deprecation warnings for things we want to go away.
          if client_config:
              warnings.warn('The `client_config` argument is deprecated.',
                            PendingDeprecationWarning)
          if channel:
              warnings.warn(
                  'The `channel` argument is deprecated; use '
                  '`transport` instead.', PendingDeprecationWarning)
  
          # Instantiate the transport.
          # The transport is responsible for handling serialization and
          # deserialization and actually sending data to the service.
          if transport:
              if callable(transport):
                  self.transport = transport(
                      credentials=credentials,
                      default_class=image_annotator_grpc_transport.
                      ImageAnnotatorGrpcTransport,
                  )
              else:
                  if credentials:
                      raise ValueError(
                          'Received both a transport instance and '
                          'credentials; these are mutually exclusive.')
                  self.transport = transport
          else:
              self.transport = image_annotator_grpc_transport.ImageAnnotatorGrpcTransport(
                  address=self.SERVICE_ADDRESS,
                  channel=channel,
                  credentials=credentials,
              )
  
          if client_info is None:
              client_info = google.api_core.gapic_v1.client_info.ClientInfo(
                  gapic_version=_GAPIC_LIBRARY_VERSION, )
          else:
              client_info.gapic_version = _GAPIC_LIBRARY_VERSION
          self._client_info = client_info
  
          # Parse out the default settings for retry and timeout for each RPC
          # from the client configuration.
          # (Ordinarily, these are the defaults specified in the `*_config.py`
          # file next to this one.)
          self._method_configs = google.api_core.gapic_v1.config.parse_method_configs(
              client_config['interfaces'][self._INTERFACE_NAME], )
  
          # Save a dictionary of cached API call functions.
          # These are the actual callables which invoke the proper
          # transport methods, wrapped with `wrap_method` to add retry,
          # timeout, and the like.
          self._inner_api_calls = {}
  
      # Service calls
      def batch_annotate_images(self,
                                requests,
                                retry=google.api_core.gapic_v1.method.DEFAULT,
                                timeout=google.api_core.gapic_v1.method.DEFAULT,
                                metadata=None):
          """
          Run image detection and annotation for a batch of images.
  
          Example:
              >>> from google.cloud import vision_v1p2beta1
              >>>
              >>> client = vision_v1p2beta1.ImageAnnotatorClient()
              >>>
              >>> # TODO: Initialize `requests`:
              >>> requests = []
              >>>
              >>> response = client.batch_annotate_images(requests)
  
          Args:
              requests (list[Union[dict, ~google.cloud.vision_v1p2beta1.types.AnnotateImageRequest]]): Individual image annotation requests for this batch.
  
                  If a dict is provided, it must be of the same form as the protobuf
                  message :class:`~google.cloud.vision_v1p2beta1.types.AnnotateImageRequest`
              retry (Optional[google.api_core.retry.Retry]):  A retry object used
                  to retry requests. If ``None`` is specified, requests will not
                  be retried.
              timeout (Optional[float]): The amount of time, in seconds, to wait
                  for the request to complete. Note that if ``retry`` is
                  specified, the timeout applies to each individual attempt.
              metadata (Optional[Sequence[Tuple[str, str]]]): Additional metadata
                  that is provided to the method.
  
          Returns:
              A :class:`~google.cloud.vision_v1p2beta1.types.BatchAnnotateImagesResponse` instance.
  
          Raises:
              google.api_core.exceptions.GoogleAPICallError: If the request
                      failed for any reason.
              google.api_core.exceptions.RetryError: If the request failed due
                      to a retryable error and retry attempts failed.
              ValueError: If the parameters are invalid.
          """
          # Wrap the transport method to add retry and timeout logic.
          if 'batch_annotate_images' not in self._inner_api_calls:
              self._inner_api_calls[
                  'batch_annotate_images'] = google.api_core.gapic_v1.method.wrap_method(
                      self.transport.batch_annotate_images,
                      default_retry=self._method_configs['BatchAnnotateImages'].
                      retry,
                      default_timeout=self.
                      _method_configs['BatchAnnotateImages'].timeout,
                      client_info=self._client_info,
                  )
  
          request = image_annotator_pb2.BatchAnnotateImagesRequest(
              requests=requests, )
          return self._inner_api_calls['batch_annotate_images'](
              request, retry=retry, timeout=timeout, metadata=metadata)
  
      def async_batch_annotate_files(
              self,
              requests,
              retry=google.api_core.gapic_v1.method.DEFAULT,
              timeout=google.api_core.gapic_v1.method.DEFAULT,
              metadata=None):
          """
          Run async image detection and annotation for a list of generic files
          (e.g. PDF) which may contain multiple pages and multiple images per
          page. Progress and results can be retrieved through the
          ``google.longrunning.Operations`` interface. ``Operation.metadata``
          contains ``OperationMetadata`` (metadata). ``Operation.response``
          contains ``AsyncBatchAnnotateFilesResponse`` (results).
  
          Example:
              >>> from google.cloud import vision_v1p2beta1
              >>>
              >>> client = vision_v1p2beta1.ImageAnnotatorClient()
              >>>
              >>> # TODO: Initialize `requests`:
              >>> requests = []
              >>>
              >>> response = client.async_batch_annotate_files(requests)
              >>>
              >>> def callback(operation_future):
              ...     # Handle result.
              ...     result = operation_future.result()
              >>>
              >>> response.add_done_callback(callback)
              >>>
              >>> # Handle metadata.
              >>> metadata = response.metadata()
  
          Args:
              requests (list[Union[dict, ~google.cloud.vision_v1p2beta1.types.AsyncAnnotateFileRequest]]): Individual async file annotation requests for this batch.
  
                  If a dict is provided, it must be of the same form as the protobuf
                  message :class:`~google.cloud.vision_v1p2beta1.types.AsyncAnnotateFileRequest`
              retry (Optional[google.api_core.retry.Retry]):  A retry object used
                  to retry requests. If ``None`` is specified, requests will not
                  be retried.
              timeout (Optional[float]): The amount of time, in seconds, to wait
                  for the request to complete. Note that if ``retry`` is
                  specified, the timeout applies to each individual attempt.
              metadata (Optional[Sequence[Tuple[str, str]]]): Additional metadata
                  that is provided to the method.
  
          Returns:
              A :class:`~google.cloud.vision_v1p2beta1.types._OperationFuture` instance.
  
          Raises:
              google.api_core.exceptions.GoogleAPICallError: If the request
                      failed for any reason.
              google.api_core.exceptions.RetryError: If the request failed due
                      to a retryable error and retry attempts failed.
              ValueError: If the parameters are invalid.
          """
          # Wrap the transport method to add retry and timeout logic.
          if 'async_batch_annotate_files' not in self._inner_api_calls:
              self._inner_api_calls[
                  'async_batch_annotate_files'] = google.api_core.gapic_v1.method.wrap_method(
                      self.transport.async_batch_annotate_files,
                      default_retry=self.
                      _method_configs['AsyncBatchAnnotateFiles'].retry,
                      default_timeout=self.
                      _method_configs['AsyncBatchAnnotateFiles'].timeout,
                      client_info=self._client_info,
                  )
  
          request = image_annotator_pb2.AsyncBatchAnnotateFilesRequest(
              requests=requests, )
          operation = self._inner_api_calls['async_batch_annotate_files'](
              request, retry=retry, timeout=timeout, metadata=metadata)
          return google.api_core.operation.from_gapic(
              operation,
              self.transport._operations_client,
              image_annotator_pb2.AsyncBatchAnnotateFilesResponse,
              metadata_type=image_annotator_pb2.OperationMetadata,
          )
  