As of January 1, 2020 this library no longer supports Python 2 on the latest released version. Library versions released prior to that date will continue to be available. For more information please visit Python 2 support on Google Cloud.

Bigtable Data Client Async

Note

It is generally not recommended to use the async client in an otherwise synchronous codebase. To make use of asyncio’s performance benefits, the codebase should be designed to be async from the ground up.

class google.cloud.bigtable.data._async.client.BigtableDataClientAsync(*, project: str | None = None, pool_size: int = 3, credentials: google.auth.credentials.Credentials | None = None, client_options: dict[str, Any] | 'google.api_core.client_options.ClientOptions' | None = None)[source]

Bases: google.cloud.client.ClientWithProject

Create a client instance for the Bigtable Data API

Client should be created within an async context (running event loop)

Parameters

  • project – the project which the client acts on behalf of. If not passed, falls back to the default inferred from the environment.

  • pool_size – The number of grpc channels to maintain in the internal channel pool.

  • credentials – Thehe OAuth2 Credentials to use for this client. If not passed (and if no _http object is passed), falls back to the default inferred from the environment.

  • client_options – Client options used to set user options on the client. API Endpoint should be set through client_options.

Raises

  • RuntimeError – if called outside of an async context (no running event loop)

  • ValueError – if pool_size is less than 1

async close(timeout: float = 2.0)[source]

Cancel all background tasks

async execute_query(query: str, instance_id: str, *, parameters: Dict[str, ExecuteQueryValueType] | None = None, parameter_types: Dict[str, SqlType.Type] | None = None, app_profile_id: str | None = None, operation_timeout: float = 600, attempt_timeout: float | None = 20, retryable_errors: Sequence[type[Exception]] = (<class 'google.api_core.exceptions.DeadlineExceeded'>, <class 'google.api_core.exceptions.ServiceUnavailable'>, <class 'google.api_core.exceptions.Aborted'>)) → ExecuteQueryIteratorAsync[source]

Executes an SQL query on an instance. Returns an iterator to asynchronously stream back columns from selected rows.

Failed requests within operation_timeout will be retried based on the retryable_errors list until operation_timeout is reached.

Parameters

  • query – Query to be run on Bigtable instance. The query can use @param placeholders to use parameter interpolation on the server. Values for all parameters should be provided in parameters. Types of parameters are inferred but should be provided in parameter_types if the inference is not possible (i.e. when value can be None, an empty list or an empty dict).

  • instance_id – The Bigtable instance ID to perform the query on. instance_id is combined with the client’s project to fully specify the instance.

  • parameters – Dictionary with values for all parameters used in the query.

  • parameter_types – Dictionary with types of parameters used in the query. Required to contain entries only for parameters whose type cannot be detected automatically (i.e. the value can be None, an empty list or an empty dict).

  • app_profile_id – The app profile to associate with requests. https://cloud.google.com/bigtable/docs/app-profiles

  • operation_timeout – the time budget for the entire operation, in seconds. Failed requests will be retried within the budget. Defaults to 600 seconds.

  • attempt_timeout – the time budget for an individual network request, in seconds. If it takes longer than this time to complete, the request will be cancelled with a DeadlineExceeded exception, and a retry will be attempted. Defaults to the 20 seconds. If None, defaults to operation_timeout.

  • retryable_errors – a list of errors that will be retried if encountered. Defaults to 4 (DeadlineExceeded), 14 (ServiceUnavailable), and 10 (Aborted)

Returns

an asynchronous iterator that yields rows returned by the query

Return type

ExecuteQueryIteratorAsync

Raises
get_table(instance_id: str, table_id: str, *args, **kwargs) → google.cloud.bigtable.data._async.client.TableAsync[source]

Returns a table instance for making data API requests. All arguments are passed directly to the TableAsync constructor.

Parameters

  • instance_id – The Bigtable instance ID to associate with this client. instance_id is combined with the client’s project to fully specify the instance

  • table_id – The ID of the table. table_id is combined with the instance_id and the client’s project to fully specify the table

  • app_profile_id – The app profile to associate with requests. https://cloud.google.com/bigtable/docs/app-profiles

  • default_read_rows_operation_timeout – The default timeout for read rows operations, in seconds. If not set, defaults to 600 seconds (10 minutes)

  • default_read_rows_attempt_timeout – The default timeout for individual read rows rpc requests, in seconds. If not set, defaults to 20 seconds

  • default_mutate_rows_operation_timeout – The default timeout for mutate rows operations, in seconds. If not set, defaults to 600 seconds (10 minutes)

  • default_mutate_rows_attempt_timeout – The default timeout for individual mutate rows rpc requests, in seconds. If not set, defaults to 60 seconds

  • default_operation_timeout – The default timeout for all other operations, in seconds. If not set, defaults to 60 seconds

  • default_attempt_timeout – The default timeout for all other individual rpc requests, in seconds. If not set, defaults to 20 seconds

  • default_read_rows_retryable_errors – a list of errors that will be retried if encountered during read_rows and related operations. Defaults to 4 (DeadlineExceeded), 14 (ServiceUnavailable), and 10 (Aborted)

  • default_mutate_rows_retryable_errors – a list of errors that will be retried if encountered during mutate_rows and related operations. Defaults to 4 (DeadlineExceeded) and 14 (ServiceUnavailable)

  • default_retryable_errors – a list of errors that will be retried if encountered during all other operations. Defaults to 4 (DeadlineExceeded) and 14 (ServiceUnavailable)

Returns

a table instance for making data API requests

Return type

TableAsync

Raises

RuntimeError – if called outside of an async context (no running event loop)