text: # -*- coding: utf-8 -*-
  
  # Copyright 2020 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
  #
  #     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.
  #
  
  from typing import (
      Any,
      AsyncIterable,
      Awaitable,
      Callable,
      Iterable,
      Sequence,
      Tuple,
      Optional,
  )
  
  from google.cloud.appengine_admin_v1.types import appengine
  from google.cloud.appengine_admin_v1.types import instance
  
  
  class ListInstancesPager:
      """A pager for iterating through ``list_instances`` requests.
  
      This class thinly wraps an initial
      :class:`google.cloud.appengine_admin_v1.types.ListInstancesResponse` object, and
      provides an ``__iter__`` method to iterate through its
      ``instances`` field.
  
      If there are more pages, the ``__iter__`` method will make additional
      ``ListInstances`` requests and continue to iterate
      through the ``instances`` field on the
      corresponding responses.
  
      All the usual :class:`google.cloud.appengine_admin_v1.types.ListInstancesResponse`
      attributes are available on the pager. If multiple requests are made, only
      the most recent response is retained, and thus used for attribute lookup.
      """
  
      def __init__(
          self,
          method: Callable[..., appengine.ListInstancesResponse],
          request: appengine.ListInstancesRequest,
          response: appengine.ListInstancesResponse,
          *,
          metadata: Sequence[Tuple[str, str]] = ()
      ):
          """Instantiate the pager.
  
          Args:
              method (Callable): The method that was originally called, and
                  which instantiated this pager.
              request (google.cloud.appengine_admin_v1.types.ListInstancesRequest):
                  The initial request object.
              response (google.cloud.appengine_admin_v1.types.ListInstancesResponse):
                  The initial response object.
              metadata (Sequence[Tuple[str, str]]): Strings which should be
                  sent along with the request as metadata.
          """
          self._method = method
          self._request = appengine.ListInstancesRequest(request)
          self._response = response
          self._metadata = metadata
  
      def __getattr__(self, name: str) -> Any:
          return getattr(self._response, name)
  
      @property
      def pages(self) -> Iterable[appengine.ListInstancesResponse]:
          yield self._response
          while self._response.next_page_token:
              self._request.page_token = self._response.next_page_token
              self._response = self._method(self._request, metadata=self._metadata)
              yield self._response
  
      def __iter__(self) -> Iterable[instance.Instance]:
          for page in self.pages:
              yield from page.instances
  
      def __repr__(self) -> str:
          return "{0}<{1!r}>".format(self.__class__.__name__, self._response)
  
  
  class ListInstancesAsyncPager:
      """A pager for iterating through ``list_instances`` requests.
  
      This class thinly wraps an initial
      :class:`google.cloud.appengine_admin_v1.types.ListInstancesResponse` object, and
      provides an ``__aiter__`` method to iterate through its
      ``instances`` field.
  
      If there are more pages, the ``__aiter__`` method will make additional
      ``ListInstances`` requests and continue to iterate
      through the ``instances`` field on the
      corresponding responses.
  
      All the usual :class:`google.cloud.appengine_admin_v1.types.ListInstancesResponse`
      attributes are available on the pager. If multiple requests are made, only
      the most recent response is retained, and thus used for attribute lookup.
      """
  
      def __init__(
          self,
          method: Callable[..., Awaitable[appengine.ListInstancesResponse]],
          request: appengine.ListInstancesRequest,
          response: appengine.ListInstancesResponse,
          *,
          metadata: Sequence[Tuple[str, str]] = ()
      ):
          """Instantiate the pager.
  
          Args:
              method (Callable): The method that was originally called, and
                  which instantiated this pager.
              request (google.cloud.appengine_admin_v1.types.ListInstancesRequest):
                  The initial request object.
              response (google.cloud.appengine_admin_v1.types.ListInstancesResponse):
                  The initial response object.
              metadata (Sequence[Tuple[str, str]]): Strings which should be
                  sent along with the request as metadata.
          """
          self._method = method
          self._request = appengine.ListInstancesRequest(request)
          self._response = response
          self._metadata = metadata
  
      def __getattr__(self, name: str) -> Any:
          return getattr(self._response, name)
  
      @property
      async def pages(self) -> AsyncIterable[appengine.ListInstancesResponse]:
          yield self._response
          while self._response.next_page_token:
              self._request.page_token = self._response.next_page_token
              self._response = await self._method(self._request, metadata=self._metadata)
              yield self._response
  
      def __aiter__(self) -> AsyncIterable[instance.Instance]:
          async def async_generator():
              async for page in self.pages:
                  for response in page.instances:
                      yield response
  
          return async_generator()
  
      def __repr__(self) -> str:
          return "{0}<{1!r}>".format(self.__class__.__name__, self._response)
  