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Showing content from https://cloud.google.com/python/docs/reference/spanner/latest/google.cloud.spanner_v1.client.Client below:

Class Client (3.55.0) | Python client library

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Client(project=None, credentials=None, client_info=<google.api_core.gapic_v1.client_info.ClientInfo object>, client_options=None, query_options=None, route_to_leader_enabled=True, directed_read_options=None, observability_options=None, default_transaction_options: typing.Optional[google.cloud.spanner_v1.transaction.DefaultTransactionOptions] = None)

Client for interacting with Cloud Spanner API.

(Optional) Default options to use for all transactions.

(Optional) The ID of the project which owns the instances, tables and data. If not provided, will attempt to determine from the environment.

(Optional) 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.

(Optional) 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 library or partner tool.

(Optional) Client options used to set user options on the client. API Endpoint should be set through client_options.

(Optional) Query optimizer configuration to use for the given query. If a dict is provided, it must be of the same form as the protobuf message QueryOptions

(Optional) Default True. Set route_to_leader_enabled as False to disable leader aware routing. Disabling leader aware routing would route all requests in RW/PDML transactions to the closest region.

(Optional) Client options used to set the directed_read_options for all ReadRequests and ExecuteSqlRequests that indicates which replicas or regions should be used for non-transactional reads or queries.

(Optional) the configuration to control the tracer's behavior. tracer_provider is the injected tracer provider enable_extended_tracing: :type:boolean when set to true will allow for spans that issue SQL statements to be annotated with SQL. Default True, please set it to False to turn it off or you can use the environment variable SPANNER_ENABLE_EXTENDED_TRACING= to control it. enable_end_to_end_tracing: :type:boolean when set to true will allow for spans from Spanner server side. Default False, please set it to True to turn it on or you can use the environment variable SPANNER_ENABLE_END_TO_END_TRACING= to control it.

Getter for client's credentials.

Helper for session-related API calls.

Getter for default_transaction_options.

Getter for directed_read_options.

Helper for session-related API calls.

Getter for observability_options.

Project name to be used with Spanner APIs.

Getter for if read-write or pdml requests will be routed to leader.

Make a copy of this client.

Copies the local data stored as simple types but does not copy the current state of any open connections with the Cloud Bigtable API.

instance(
    instance_id,
    configuration_name=None,
    display_name=None,
    node_count=None,
    labels=None,
    processing_units=None,
)

Factory to create a instance associated with this client.

The ID of the instance.

(Optional) Name of the instance configuration used to set up the instance's cluster, in the form: projects/ . Required for instances which do not yet exist.

(Optional) The display name for the instance in the Cloud Console UI. (Must be between 4 and 30 characters.) If this value is not set in the constructor, will fall back to the instance ID.

(Optional) The number of nodes in the instance's cluster; used to set up the instance's cluster.

(Optional) The number of processing units allocated to this instance.

(Optional) User-assigned labels for this instance.

list_instance_configs(page_size=None)

Optional. The maximum number of configs in each page of results from this request. Non-positive values are ignored. Defaults to a sensible value set by the API.

list_instances(filter_="", page_size=None)

(Optional) Filter to select instances listed. See the ListInstancesRequest docs above for examples.

Optional. The maximum number of instances in each page of results from this request. Non-positive values are ignored. Defaults to a sensible value set by the API.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-07-18 UTC.

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