# Cloud Pub/Sub API . projects . subscriptions

## Instance Methods

Acknowledges the messages associated with the `ack_ids` in the

Creates a subscription to a given topic. See the

Deletes an existing subscription. All messages retained in the subscription

Gets the configuration details of a subscription.

Gets the access control policy for a resource.

Lists matching subscriptions.

Retrieves the next page of results.

Modifies the ack deadline for a specific message. This method is useful

Modifies the `PushConfig` for a specified subscription.

Updates an existing subscription. Note that certain properties of a

Pulls messages from the server. The server may return `UNAVAILABLE` if

Seeks an existing subscription to a point in time or to a given snapshot,

Sets the access control policy on the specified resource. Replaces any

Returns permissions that a caller has on the specified resource.

### Method Details

`acknowledge(subscription, body, x__xgafv=None)`

    Acknowledges the messages associated with the `ack_ids` in the
    `AcknowledgeRequest`. The Pub/Sub system can remove the relevant messages
    from the subscription.

    Acknowledging a message whose ack deadline has expired may succeed,
    but such a message may be redelivered later. Acknowledging a message more
    than once will not result in an error.

    Args:
      subscription: string, The subscription whose message is being acknowledged.
    Format is `projects/{project}/subscriptions/{sub}`. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # Request for the Acknowledge method.
        "ackIds": [ # The acknowledgment ID for the messages being acknowledged that was returned
            # by the Pub/Sub system in the `Pull` response. Must not be empty.
          "A String",
        ],
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # A generic empty message that you can re-use to avoid defining duplicated
          # empty messages in your APIs. A typical example is to use it as the request
          # or the response type of an API method. For instance:
          #
          #     service Foo {
          #       rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty);
          #     }
          #
          # The JSON representation for `Empty` is empty JSON object `{}`.
      }

`create(name, body, x__xgafv=None)`

    Creates a subscription to a given topic. See the

    resource name rules.
    If the subscription already exists, returns `ALREADY_EXISTS`.
    If the corresponding topic doesn't exist, returns `NOT_FOUND`.

    If the name is not provided in the request, the server will assign a random
    name for this subscription on the same project as the topic, conforming
    to the
    [resource name
    format](https://cloud.google.com/pubsub/docs/admin#resource_names). The
    generated name is populated in the returned Subscription object. Note that
    for REST API requests, you must specify a name in the request.

    Args:
      name: string, The name of the subscription. It must have the format
    `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
    start with a letter, and contain only letters (`[A-Za-z]`), numbers
    (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
    plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters
    in length, and it must not start with `"goog"`. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # A subscription resource.
      "name": "A String", # The name of the subscription. It must have the format
          # `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
          # start with a letter, and contain only letters (`[A-Za-z]`), numbers
          # (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
          # plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters
          # in length, and it must not start with `"goog"`.
      "ackDeadlineSeconds": 42, # The approximate amount of time (on a best-effort basis) Pub/Sub waits for
          # the subscriber to acknowledge receipt before resending the message. In the
          # interval after the message is delivered and before it is acknowledged, it
          # is considered to be outstanding. During that time period, the
          # message will not be redelivered (on a best-effort basis).
          #
          # For pull subscriptions, this value is used as the initial value for the ack
          # deadline. To override this value for a given message, call
          # `ModifyAckDeadline` with the corresponding `ack_id` if using
          # non-streaming pull or send the `ack_id` in a
          # `StreamingModifyAckDeadlineRequest` if using streaming pull.
          # The minimum custom deadline you can specify is 10 seconds.
          # The maximum custom deadline you can specify is 600 seconds (10 minutes).
          # If this parameter is 0, a default value of 10 seconds is used.
          #
          # For push delivery, this value is also used to set the request timeout for
          # the call to the push endpoint.
          #
          # If the subscriber never acknowledges the message, the Pub/Sub
          # system will eventually redeliver the message.
      "labels": { # See  Creating and
          # managing labels.
        "a_key": "A String",
      },
      "pushConfig": { # Configuration for a push delivery endpoint. # If push delivery is used with this subscription, this field is
          # used to configure it. An empty `pushConfig` signifies that the subscriber
          # will pull and ack messages using API methods.
        "attributes": { # Endpoint configuration attributes.
            #
            # Every endpoint has a set of API supported attributes that can be used to
            # control different aspects of the message delivery.
            #
            # The currently supported attribute is `x-goog-version`, which you can
            # use to change the format of the pushed message. This attribute
            # indicates the version of the data expected by the endpoint. This
            # controls the shape of the pushed message (i.e., its fields and metadata).
            # The endpoint version is based on the version of the Pub/Sub API.
            #
            # If not present during the `CreateSubscription` call, it will default to
            # the version of the API used to make such call. If not present during a
            # `ModifyPushConfig` call, its value will not be changed. `GetSubscription`
            # calls will always return a valid version, even if the subscription was
            # created without this attribute.
            #
            # The possible values for this attribute are:
            #
            # * `v1beta1`: uses the push format defined in the v1beta1 Pub/Sub API.
            # * `v1` or `v1beta2`: uses the push format defined in the v1 Pub/Sub API.
          "a_key": "A String",
        },
        "oidcToken": { # Contains information needed for generating an # If specified, Pub/Sub will generate and attach an OIDC JWT token as an
            # `Authorization` header in the HTTP request for every pushed message.
            # [OpenID Connect
            # token](https://developers.google.com/identity/protocols/OpenIDConnect).
          "audience": "A String", # Audience to be used when generating OIDC token. The audience claim
              # identifies the recipients that the JWT is intended for. The audience
              # value is a single case-sensitive string. Having multiple values (array)
              # for the audience field is not supported. More info about the OIDC JWT
              # token audience here: https://tools.ietf.org/html/rfc7519#section-4.1.3
              # Note: if not specified, the Push endpoint URL will be used.
          "serviceAccountEmail": "A String", # [Service account
              # email](https://cloud.google.com/iam/docs/service-accounts)
              # to be used for generating the OIDC token. The caller (for
              # CreateSubscription, UpdateSubscription, and ModifyPushConfig RPCs) must
              # have the iam.serviceAccounts.actAs permission for the service account.
        },
        "pushEndpoint": "A String", # A URL locating the endpoint to which messages should be pushed.
            # For example, a Webhook endpoint might use "https://example.com/push".
      },
      "topic": "A String", # The name of the topic from which this subscription is receiving messages.
          # Format is `projects/{project}/topics/{topic}`.
          # The value of this field will be `_deleted-topic_` if the topic has been
          # deleted.
      "messageRetentionDuration": "A String", # How long to retain unacknowledged messages in the subscription's backlog,
          # from the moment a message is published.
          # If `retain_acked_messages` is true, then this also configures the retention
          # of acknowledged messages, and thus configures how far back in time a `Seek`
          # can be done. Defaults to 7 days. Cannot be more than 7 days or less than 10
          # minutes.
      "retainAckedMessages": True or False, # Indicates whether to retain acknowledged messages. If true, then
          # messages are not expunged from the subscription's backlog, even if they are
          # acknowledged, until they fall out of the `message_retention_duration`
          # window. This must be true if you would like to
          #
          # Seek to a timestamp.
      "expirationPolicy": { # A policy that specifies the conditions for resource expiration (i.e., # A policy that specifies the conditions for this subscription's expiration.
          # A subscription is considered active as long as any connected subscriber is
          # successfully consuming messages from the subscription or is issuing
          # operations on the subscription. If `expiration_policy` is not set, a
          # *default policy* with `ttl` of 31 days will be used. The minimum allowed
          # value for `expiration_policy.ttl` is 1 day.
          # automatic resource deletion).
        "ttl": "A String", # Specifies the "time-to-live" duration for an associated resource. The
            # resource expires if it is not active for a period of `ttl`. The definition
            # of "activity" depends on the type of the associated resource. The minimum
            # and maximum allowed values for `ttl` depend on the type of the associated
            # resource, as well. If `ttl` is not set, the associated resource never
            # expires.
      },
    }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # A subscription resource.
        "name": "A String", # The name of the subscription. It must have the format
            # `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
            # start with a letter, and contain only letters (`[A-Za-z]`), numbers
            # (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
            # plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters
            # in length, and it must not start with `"goog"`.
        "ackDeadlineSeconds": 42, # The approximate amount of time (on a best-effort basis) Pub/Sub waits for
            # the subscriber to acknowledge receipt before resending the message. In the
            # interval after the message is delivered and before it is acknowledged, it
            # is considered to be outstanding. During that time period, the
            # message will not be redelivered (on a best-effort basis).
            #
            # For pull subscriptions, this value is used as the initial value for the ack
            # deadline. To override this value for a given message, call
            # `ModifyAckDeadline` with the corresponding `ack_id` if using
            # non-streaming pull or send the `ack_id` in a
            # `StreamingModifyAckDeadlineRequest` if using streaming pull.
            # The minimum custom deadline you can specify is 10 seconds.
            # The maximum custom deadline you can specify is 600 seconds (10 minutes).
            # If this parameter is 0, a default value of 10 seconds is used.
            #
            # For push delivery, this value is also used to set the request timeout for
            # the call to the push endpoint.
            #
            # If the subscriber never acknowledges the message, the Pub/Sub
            # system will eventually redeliver the message.
        "labels": { # See  Creating and
            # managing labels.
          "a_key": "A String",
        },
        "pushConfig": { # Configuration for a push delivery endpoint. # If push delivery is used with this subscription, this field is
            # used to configure it. An empty `pushConfig` signifies that the subscriber
            # will pull and ack messages using API methods.
          "attributes": { # Endpoint configuration attributes.
              #
              # Every endpoint has a set of API supported attributes that can be used to
              # control different aspects of the message delivery.
              #
              # The currently supported attribute is `x-goog-version`, which you can
              # use to change the format of the pushed message. This attribute
              # indicates the version of the data expected by the endpoint. This
              # controls the shape of the pushed message (i.e., its fields and metadata).
              # The endpoint version is based on the version of the Pub/Sub API.
              #
              # If not present during the `CreateSubscription` call, it will default to
              # the version of the API used to make such call. If not present during a
              # `ModifyPushConfig` call, its value will not be changed. `GetSubscription`
              # calls will always return a valid version, even if the subscription was
              # created without this attribute.
              #
              # The possible values for this attribute are:
              #
              # * `v1beta1`: uses the push format defined in the v1beta1 Pub/Sub API.
              # * `v1` or `v1beta2`: uses the push format defined in the v1 Pub/Sub API.
            "a_key": "A String",
          },
          "oidcToken": { # Contains information needed for generating an # If specified, Pub/Sub will generate and attach an OIDC JWT token as an
              # `Authorization` header in the HTTP request for every pushed message.
              # [OpenID Connect
              # token](https://developers.google.com/identity/protocols/OpenIDConnect).
            "audience": "A String", # Audience to be used when generating OIDC token. The audience claim
                # identifies the recipients that the JWT is intended for. The audience
                # value is a single case-sensitive string. Having multiple values (array)
                # for the audience field is not supported. More info about the OIDC JWT
                # token audience here: https://tools.ietf.org/html/rfc7519#section-4.1.3
                # Note: if not specified, the Push endpoint URL will be used.
            "serviceAccountEmail": "A String", # [Service account
                # email](https://cloud.google.com/iam/docs/service-accounts)
                # to be used for generating the OIDC token. The caller (for
                # CreateSubscription, UpdateSubscription, and ModifyPushConfig RPCs) must
                # have the iam.serviceAccounts.actAs permission for the service account.
          },
          "pushEndpoint": "A String", # A URL locating the endpoint to which messages should be pushed.
              # For example, a Webhook endpoint might use "https://example.com/push".
        },
        "topic": "A String", # The name of the topic from which this subscription is receiving messages.
            # Format is `projects/{project}/topics/{topic}`.
            # The value of this field will be `_deleted-topic_` if the topic has been
            # deleted.
        "messageRetentionDuration": "A String", # How long to retain unacknowledged messages in the subscription's backlog,
            # from the moment a message is published.
            # If `retain_acked_messages` is true, then this also configures the retention
            # of acknowledged messages, and thus configures how far back in time a `Seek`
            # can be done. Defaults to 7 days. Cannot be more than 7 days or less than 10
            # minutes.
        "retainAckedMessages": True or False, # Indicates whether to retain acknowledged messages. If true, then
            # messages are not expunged from the subscription's backlog, even if they are
            # acknowledged, until they fall out of the `message_retention_duration`
            # window. This must be true if you would like to
            #
            # Seek to a timestamp.
        "expirationPolicy": { # A policy that specifies the conditions for resource expiration (i.e., # A policy that specifies the conditions for this subscription's expiration.
            # A subscription is considered active as long as any connected subscriber is
            # successfully consuming messages from the subscription or is issuing
            # operations on the subscription. If `expiration_policy` is not set, a
            # *default policy* with `ttl` of 31 days will be used. The minimum allowed
            # value for `expiration_policy.ttl` is 1 day.
            # automatic resource deletion).
          "ttl": "A String", # Specifies the "time-to-live" duration for an associated resource. The
              # resource expires if it is not active for a period of `ttl`. The definition
              # of "activity" depends on the type of the associated resource. The minimum
              # and maximum allowed values for `ttl` depend on the type of the associated
              # resource, as well. If `ttl` is not set, the associated resource never
              # expires.
        },
      }

`delete(subscription, x__xgafv=None)`

    Deletes an existing subscription. All messages retained in the subscription
    are immediately dropped. Calls to `Pull` after deletion will return
    `NOT_FOUND`. After a subscription is deleted, a new one may be created with
    the same name, but the new one has no association with the old
    subscription or its topic unless the same topic is specified.

    Args:
      subscription: string, The subscription to delete.
    Format is `projects/{project}/subscriptions/{sub}`. (required)
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # A generic empty message that you can re-use to avoid defining duplicated
          # empty messages in your APIs. A typical example is to use it as the request
          # or the response type of an API method. For instance:
          #
          #     service Foo {
          #       rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty);
          #     }
          #
          # The JSON representation for `Empty` is empty JSON object `{}`.
      }

`get(subscription, x__xgafv=None)`

    Gets the configuration details of a subscription.

    Args:
      subscription: string, The name of the subscription to get.
    Format is `projects/{project}/subscriptions/{sub}`. (required)
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # A subscription resource.
        "name": "A String", # The name of the subscription. It must have the format
            # `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
            # start with a letter, and contain only letters (`[A-Za-z]`), numbers
            # (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
            # plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters
            # in length, and it must not start with `"goog"`.
        "ackDeadlineSeconds": 42, # The approximate amount of time (on a best-effort basis) Pub/Sub waits for
            # the subscriber to acknowledge receipt before resending the message. In the
            # interval after the message is delivered and before it is acknowledged, it
            # is considered to be outstanding. During that time period, the
            # message will not be redelivered (on a best-effort basis).
            #
            # For pull subscriptions, this value is used as the initial value for the ack
            # deadline. To override this value for a given message, call
            # `ModifyAckDeadline` with the corresponding `ack_id` if using
            # non-streaming pull or send the `ack_id` in a
            # `StreamingModifyAckDeadlineRequest` if using streaming pull.
            # The minimum custom deadline you can specify is 10 seconds.
            # The maximum custom deadline you can specify is 600 seconds (10 minutes).
            # If this parameter is 0, a default value of 10 seconds is used.
            #
            # For push delivery, this value is also used to set the request timeout for
            # the call to the push endpoint.
            #
            # If the subscriber never acknowledges the message, the Pub/Sub
            # system will eventually redeliver the message.
        "labels": { # See  Creating and
            # managing labels.
          "a_key": "A String",
        },
        "pushConfig": { # Configuration for a push delivery endpoint. # If push delivery is used with this subscription, this field is
            # used to configure it. An empty `pushConfig` signifies that the subscriber
            # will pull and ack messages using API methods.
          "attributes": { # Endpoint configuration attributes.
              #
              # Every endpoint has a set of API supported attributes that can be used to
              # control different aspects of the message delivery.
              #
              # The currently supported attribute is `x-goog-version`, which you can
              # use to change the format of the pushed message. This attribute
              # indicates the version of the data expected by the endpoint. This
              # controls the shape of the pushed message (i.e., its fields and metadata).
              # The endpoint version is based on the version of the Pub/Sub API.
              #
              # If not present during the `CreateSubscription` call, it will default to
              # the version of the API used to make such call. If not present during a
              # `ModifyPushConfig` call, its value will not be changed. `GetSubscription`
              # calls will always return a valid version, even if the subscription was
              # created without this attribute.
              #
              # The possible values for this attribute are:
              #
              # * `v1beta1`: uses the push format defined in the v1beta1 Pub/Sub API.
              # * `v1` or `v1beta2`: uses the push format defined in the v1 Pub/Sub API.
            "a_key": "A String",
          },
          "oidcToken": { # Contains information needed for generating an # If specified, Pub/Sub will generate and attach an OIDC JWT token as an
              # `Authorization` header in the HTTP request for every pushed message.
              # [OpenID Connect
              # token](https://developers.google.com/identity/protocols/OpenIDConnect).
            "audience": "A String", # Audience to be used when generating OIDC token. The audience claim
                # identifies the recipients that the JWT is intended for. The audience
                # value is a single case-sensitive string. Having multiple values (array)
                # for the audience field is not supported. More info about the OIDC JWT
                # token audience here: https://tools.ietf.org/html/rfc7519#section-4.1.3
                # Note: if not specified, the Push endpoint URL will be used.
            "serviceAccountEmail": "A String", # [Service account
                # email](https://cloud.google.com/iam/docs/service-accounts)
                # to be used for generating the OIDC token. The caller (for
                # CreateSubscription, UpdateSubscription, and ModifyPushConfig RPCs) must
                # have the iam.serviceAccounts.actAs permission for the service account.
          },
          "pushEndpoint": "A String", # A URL locating the endpoint to which messages should be pushed.
              # For example, a Webhook endpoint might use "https://example.com/push".
        },
        "topic": "A String", # The name of the topic from which this subscription is receiving messages.
            # Format is `projects/{project}/topics/{topic}`.
            # The value of this field will be `_deleted-topic_` if the topic has been
            # deleted.
        "messageRetentionDuration": "A String", # How long to retain unacknowledged messages in the subscription's backlog,
            # from the moment a message is published.
            # If `retain_acked_messages` is true, then this also configures the retention
            # of acknowledged messages, and thus configures how far back in time a `Seek`
            # can be done. Defaults to 7 days. Cannot be more than 7 days or less than 10
            # minutes.
        "retainAckedMessages": True or False, # Indicates whether to retain acknowledged messages. If true, then
            # messages are not expunged from the subscription's backlog, even if they are
            # acknowledged, until they fall out of the `message_retention_duration`
            # window. This must be true if you would like to
            #
            # Seek to a timestamp.
        "expirationPolicy": { # A policy that specifies the conditions for resource expiration (i.e., # A policy that specifies the conditions for this subscription's expiration.
            # A subscription is considered active as long as any connected subscriber is
            # successfully consuming messages from the subscription or is issuing
            # operations on the subscription. If `expiration_policy` is not set, a
            # *default policy* with `ttl` of 31 days will be used. The minimum allowed
            # value for `expiration_policy.ttl` is 1 day.
            # automatic resource deletion).
          "ttl": "A String", # Specifies the "time-to-live" duration for an associated resource. The
              # resource expires if it is not active for a period of `ttl`. The definition
              # of "activity" depends on the type of the associated resource. The minimum
              # and maximum allowed values for `ttl` depend on the type of the associated
              # resource, as well. If `ttl` is not set, the associated resource never
              # expires.
        },
      }

`getIamPolicy(resource, x__xgafv=None)`

    Gets the access control policy for a resource.
    Returns an empty policy if the resource exists and does not have a policy
    set.

    Args:
      resource: string, REQUIRED: The resource for which the policy is being requested.
    See the operation documentation for the appropriate value for this field. (required)
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Defines an Identity and Access Management (IAM) policy. It is used to
          # specify access control policies for Cloud Platform resources.
          #
          #
          # A `Policy` consists of a list of `bindings`. A `binding` binds a list of
          # `members` to a `role`, where the members can be user accounts, Google groups,
          # Google domains, and service accounts. A `role` is a named list of permissions
          # defined by IAM.
          #
          # **JSON Example**
          #
          #     {
          #       "bindings": [
          #         {
          #           "role": "roles/owner",
          #           "members": [
          #             "user:mike@example.com",
          #             "group:admins@example.com",
          #             "domain:google.com",
          #             "serviceAccount:my-other-app@appspot.gserviceaccount.com"
          #           ]
          #         },
          #         {
          #           "role": "roles/viewer",
          #           "members": ["user:sean@example.com"]
          #         }
          #       ]
          #     }
          #
          # **YAML Example**
          #
          #     bindings:
          #     - members:
          #       - user:mike@example.com
          #       - group:admins@example.com
          #       - domain:google.com
          #       - serviceAccount:my-other-app@appspot.gserviceaccount.com
          #       role: roles/owner
          #     - members:
          #       - user:sean@example.com
          #       role: roles/viewer
          #
          #
          # For a description of IAM and its features, see the
          # [IAM developer's guide](https://cloud.google.com/iam/docs).
        "bindings": [ # Associates a list of `members` to a `role`.
            # `bindings` with no members will result in an error.
          { # Associates `members` with a `role`.
            "role": "A String", # Role that is assigned to `members`.
                # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
            "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
                # `members` can have the following values:
                #
                # * `allUsers`: A special identifier that represents anyone who is
                #    on the internet; with or without a Google account.
                #
                # * `allAuthenticatedUsers`: A special identifier that represents anyone
                #    who is authenticated with a Google account or a service account.
                #
                # * `user:{emailid}`: An email address that represents a specific Google
                #    account. For example, `alice@gmail.com` .
                #
                #
                # * `serviceAccount:{emailid}`: An email address that represents a service
                #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
                #
                # * `group:{emailid}`: An email address that represents a Google group.
                #    For example, `admins@example.com`.
                #
                #
                # * `domain:{domain}`: The G Suite domain (primary) that represents all the
                #    users of that domain. For example, `google.com` or `example.com`.
                #
              "A String",
            ],
            "condition": { # Represents an expression text. Example: # The condition that is associated with this binding.
                # NOTE: An unsatisfied condition will not allow user access via current
                # binding. Different bindings, including their conditions, are examined
                # independently.
                #
                #     title: "User account presence"
                #     description: "Determines whether the request has a user account"
                #     expression: "size(request.user) > 0"
              "location": "A String", # An optional string indicating the location of the expression for error
                  # reporting, e.g. a file name and a position in the file.
              "expression": "A String", # Textual representation of an expression in
                  # Common Expression Language syntax.
                  #
                  # The application context of the containing message determines which
                  # well-known feature set of CEL is supported.
              "description": "A String", # An optional description of the expression. This is a longer text which
                  # describes the expression, e.g. when hovered over it in a UI.
              "title": "A String", # An optional title for the expression, i.e. a short string describing
                  # its purpose. This can be used e.g. in UIs which allow to enter the
                  # expression.
            },
          },
        ],
        "version": 42, # Deprecated.
        "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
            # prevent simultaneous updates of a policy from overwriting each other.
            # It is strongly suggested that systems make use of the `etag` in the
            # read-modify-write cycle to perform policy updates in order to avoid race
            # conditions: An `etag` is returned in the response to `getIamPolicy`, and
            # systems are expected to put that etag in the request to `setIamPolicy` to
            # ensure that their change will be applied to the same version of the policy.
            #
            # If no `etag` is provided in the call to `setIamPolicy`, then the existing
            # policy is overwritten blindly.
      }

`list(project, pageSize=None, pageToken=None, x__xgafv=None)`

    Lists matching subscriptions.

    Args:
      project: string, The name of the project in which to list subscriptions.
    Format is `projects/{project-id}`. (required)
      pageSize: integer, Maximum number of subscriptions to return.
      pageToken: string, The value returned by the last `ListSubscriptionsResponse`; indicates that
    this is a continuation of a prior `ListSubscriptions` call, and that the
    system should return the next page of data.
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Response for the `ListSubscriptions` method.
        "nextPageToken": "A String", # If not empty, indicates that there may be more subscriptions that match
            # the request; this value should be passed in a new
            # `ListSubscriptionsRequest` to get more subscriptions.
        "subscriptions": [ # The subscriptions that match the request.
          { # A subscription resource.
            "name": "A String", # The name of the subscription. It must have the format
                # `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
                # start with a letter, and contain only letters (`[A-Za-z]`), numbers
                # (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
                # plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters
                # in length, and it must not start with `"goog"`.
            "ackDeadlineSeconds": 42, # The approximate amount of time (on a best-effort basis) Pub/Sub waits for
                # the subscriber to acknowledge receipt before resending the message. In the
                # interval after the message is delivered and before it is acknowledged, it
                # is considered to be outstanding. During that time period, the
                # message will not be redelivered (on a best-effort basis).
                #
                # For pull subscriptions, this value is used as the initial value for the ack
                # deadline. To override this value for a given message, call
                # `ModifyAckDeadline` with the corresponding `ack_id` if using
                # non-streaming pull or send the `ack_id` in a
                # `StreamingModifyAckDeadlineRequest` if using streaming pull.
                # The minimum custom deadline you can specify is 10 seconds.
                # The maximum custom deadline you can specify is 600 seconds (10 minutes).
                # If this parameter is 0, a default value of 10 seconds is used.
                #
                # For push delivery, this value is also used to set the request timeout for
                # the call to the push endpoint.
                #
                # If the subscriber never acknowledges the message, the Pub/Sub
                # system will eventually redeliver the message.
            "labels": { # See  Creating and
                # managing labels.
              "a_key": "A String",
            },
            "pushConfig": { # Configuration for a push delivery endpoint. # If push delivery is used with this subscription, this field is
                # used to configure it. An empty `pushConfig` signifies that the subscriber
                # will pull and ack messages using API methods.
              "attributes": { # Endpoint configuration attributes.
                  #
                  # Every endpoint has a set of API supported attributes that can be used to
                  # control different aspects of the message delivery.
                  #
                  # The currently supported attribute is `x-goog-version`, which you can
                  # use to change the format of the pushed message. This attribute
                  # indicates the version of the data expected by the endpoint. This
                  # controls the shape of the pushed message (i.e., its fields and metadata).
                  # The endpoint version is based on the version of the Pub/Sub API.
                  #
                  # If not present during the `CreateSubscription` call, it will default to
                  # the version of the API used to make such call. If not present during a
                  # `ModifyPushConfig` call, its value will not be changed. `GetSubscription`
                  # calls will always return a valid version, even if the subscription was
                  # created without this attribute.
                  #
                  # The possible values for this attribute are:
                  #
                  # * `v1beta1`: uses the push format defined in the v1beta1 Pub/Sub API.
                  # * `v1` or `v1beta2`: uses the push format defined in the v1 Pub/Sub API.
                "a_key": "A String",
              },
              "oidcToken": { # Contains information needed for generating an # If specified, Pub/Sub will generate and attach an OIDC JWT token as an
                  # `Authorization` header in the HTTP request for every pushed message.
                  # [OpenID Connect
                  # token](https://developers.google.com/identity/protocols/OpenIDConnect).
                "audience": "A String", # Audience to be used when generating OIDC token. The audience claim
                    # identifies the recipients that the JWT is intended for. The audience
                    # value is a single case-sensitive string. Having multiple values (array)
                    # for the audience field is not supported. More info about the OIDC JWT
                    # token audience here: https://tools.ietf.org/html/rfc7519#section-4.1.3
                    # Note: if not specified, the Push endpoint URL will be used.
                "serviceAccountEmail": "A String", # [Service account
                    # email](https://cloud.google.com/iam/docs/service-accounts)
                    # to be used for generating the OIDC token. The caller (for
                    # CreateSubscription, UpdateSubscription, and ModifyPushConfig RPCs) must
                    # have the iam.serviceAccounts.actAs permission for the service account.
              },
              "pushEndpoint": "A String", # A URL locating the endpoint to which messages should be pushed.
                  # For example, a Webhook endpoint might use "https://example.com/push".
            },
            "topic": "A String", # The name of the topic from which this subscription is receiving messages.
                # Format is `projects/{project}/topics/{topic}`.
                # The value of this field will be `_deleted-topic_` if the topic has been
                # deleted.
            "messageRetentionDuration": "A String", # How long to retain unacknowledged messages in the subscription's backlog,
                # from the moment a message is published.
                # If `retain_acked_messages` is true, then this also configures the retention
                # of acknowledged messages, and thus configures how far back in time a `Seek`
                # can be done. Defaults to 7 days. Cannot be more than 7 days or less than 10
                # minutes.
            "retainAckedMessages": True or False, # Indicates whether to retain acknowledged messages. If true, then
                # messages are not expunged from the subscription's backlog, even if they are
                # acknowledged, until they fall out of the `message_retention_duration`
                # window. This must be true if you would like to
                #
                # Seek to a timestamp.
            "expirationPolicy": { # A policy that specifies the conditions for resource expiration (i.e., # A policy that specifies the conditions for this subscription's expiration.
                # A subscription is considered active as long as any connected subscriber is
                # successfully consuming messages from the subscription or is issuing
                # operations on the subscription. If `expiration_policy` is not set, a
                # *default policy* with `ttl` of 31 days will be used. The minimum allowed
                # value for `expiration_policy.ttl` is 1 day.
                # automatic resource deletion).
              "ttl": "A String", # Specifies the "time-to-live" duration for an associated resource. The
                  # resource expires if it is not active for a period of `ttl`. The definition
                  # of "activity" depends on the type of the associated resource. The minimum
                  # and maximum allowed values for `ttl` depend on the type of the associated
                  # resource, as well. If `ttl` is not set, the associated resource never
                  # expires.
            },
          },
        ],
      }

`list_next(previous_request, previous_response)`

    Retrieves the next page of results.

    Args:
      previous_request: The request for the previous page. (required)
      previous_response: The response from the request for the previous page. (required)

    Returns:
      A request object that you can call 'execute()' on to request the next
      page. Returns None if there are no more items in the collection.

`modifyAckDeadline(subscription, body, x__xgafv=None)`

    Modifies the ack deadline for a specific message. This method is useful
    to indicate that more time is needed to process a message by the
    subscriber, or to make the message available for redelivery if the
    processing was interrupted. Note that this does not modify the
    subscription-level `ackDeadlineSeconds` used for subsequent messages.

    Args:
      subscription: string, The name of the subscription.
    Format is `projects/{project}/subscriptions/{sub}`. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # Request for the ModifyAckDeadline method.
        "ackDeadlineSeconds": 42, # The new ack deadline with respect to the time this request was sent to
            # the Pub/Sub system. For example, if the value is 10, the new
            # ack deadline will expire 10 seconds after the `ModifyAckDeadline` call
            # was made. Specifying zero might immediately make the message available for
            # delivery to another subscriber client. This typically results in an
            # increase in the rate of message redeliveries (that is, duplicates).
            # The minimum deadline you can specify is 0 seconds.
            # The maximum deadline you can specify is 600 seconds (10 minutes).
        "ackIds": [ # List of acknowledgment IDs.
          "A String",
        ],
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # A generic empty message that you can re-use to avoid defining duplicated
          # empty messages in your APIs. A typical example is to use it as the request
          # or the response type of an API method. For instance:
          #
          #     service Foo {
          #       rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty);
          #     }
          #
          # The JSON representation for `Empty` is empty JSON object `{}`.
      }

`modifyPushConfig(subscription, body, x__xgafv=None)`

    Modifies the `PushConfig` for a specified subscription.

    This may be used to change a push subscription to a pull one (signified by
    an empty `PushConfig`) or vice versa, or change the endpoint URL and other
    attributes of a push subscription. Messages will accumulate for delivery
    continuously through the call regardless of changes to the `PushConfig`.

    Args:
      subscription: string, The name of the subscription.
    Format is `projects/{project}/subscriptions/{sub}`. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # Request for the ModifyPushConfig method.
        "pushConfig": { # Configuration for a push delivery endpoint. # The push configuration for future deliveries.
            #
            # An empty `pushConfig` indicates that the Pub/Sub system should
            # stop pushing messages from the given subscription and allow
            # messages to be pulled and acknowledged - effectively pausing
            # the subscription if `Pull` or `StreamingPull` is not called.
          "attributes": { # Endpoint configuration attributes.
              #
              # Every endpoint has a set of API supported attributes that can be used to
              # control different aspects of the message delivery.
              #
              # The currently supported attribute is `x-goog-version`, which you can
              # use to change the format of the pushed message. This attribute
              # indicates the version of the data expected by the endpoint. This
              # controls the shape of the pushed message (i.e., its fields and metadata).
              # The endpoint version is based on the version of the Pub/Sub API.
              #
              # If not present during the `CreateSubscription` call, it will default to
              # the version of the API used to make such call. If not present during a
              # `ModifyPushConfig` call, its value will not be changed. `GetSubscription`
              # calls will always return a valid version, even if the subscription was
              # created without this attribute.
              #
              # The possible values for this attribute are:
              #
              # * `v1beta1`: uses the push format defined in the v1beta1 Pub/Sub API.
              # * `v1` or `v1beta2`: uses the push format defined in the v1 Pub/Sub API.
            "a_key": "A String",
          },
          "oidcToken": { # Contains information needed for generating an # If specified, Pub/Sub will generate and attach an OIDC JWT token as an
              # `Authorization` header in the HTTP request for every pushed message.
              # [OpenID Connect
              # token](https://developers.google.com/identity/protocols/OpenIDConnect).
            "audience": "A String", # Audience to be used when generating OIDC token. The audience claim
                # identifies the recipients that the JWT is intended for. The audience
                # value is a single case-sensitive string. Having multiple values (array)
                # for the audience field is not supported. More info about the OIDC JWT
                # token audience here: https://tools.ietf.org/html/rfc7519#section-4.1.3
                # Note: if not specified, the Push endpoint URL will be used.
            "serviceAccountEmail": "A String", # [Service account
                # email](https://cloud.google.com/iam/docs/service-accounts)
                # to be used for generating the OIDC token. The caller (for
                # CreateSubscription, UpdateSubscription, and ModifyPushConfig RPCs) must
                # have the iam.serviceAccounts.actAs permission for the service account.
          },
          "pushEndpoint": "A String", # A URL locating the endpoint to which messages should be pushed.
              # For example, a Webhook endpoint might use "https://example.com/push".
        },
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # A generic empty message that you can re-use to avoid defining duplicated
          # empty messages in your APIs. A typical example is to use it as the request
          # or the response type of an API method. For instance:
          #
          #     service Foo {
          #       rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty);
          #     }
          #
          # The JSON representation for `Empty` is empty JSON object `{}`.
      }

`patch(name, body, x__xgafv=None)`

    Updates an existing subscription. Note that certain properties of a
    subscription, such as its topic, are not modifiable.

    Args:
      name: string, The name of the subscription. It must have the format
    `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
    start with a letter, and contain only letters (`[A-Za-z]`), numbers
    (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
    plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters
    in length, and it must not start with `"goog"`. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # Request for the UpdateSubscription method.
        "updateMask": "A String", # Indicates which fields in the provided subscription to update.
            # Must be specified and non-empty.
        "subscription": { # A subscription resource. # The updated subscription object.
          "name": "A String", # The name of the subscription. It must have the format
              # `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
              # start with a letter, and contain only letters (`[A-Za-z]`), numbers
              # (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
              # plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters
              # in length, and it must not start with `"goog"`.
          "ackDeadlineSeconds": 42, # The approximate amount of time (on a best-effort basis) Pub/Sub waits for
              # the subscriber to acknowledge receipt before resending the message. In the
              # interval after the message is delivered and before it is acknowledged, it
              # is considered to be outstanding. During that time period, the
              # message will not be redelivered (on a best-effort basis).
              #
              # For pull subscriptions, this value is used as the initial value for the ack
              # deadline. To override this value for a given message, call
              # `ModifyAckDeadline` with the corresponding `ack_id` if using
              # non-streaming pull or send the `ack_id` in a
              # `StreamingModifyAckDeadlineRequest` if using streaming pull.
              # The minimum custom deadline you can specify is 10 seconds.
              # The maximum custom deadline you can specify is 600 seconds (10 minutes).
              # If this parameter is 0, a default value of 10 seconds is used.
              #
              # For push delivery, this value is also used to set the request timeout for
              # the call to the push endpoint.
              #
              # If the subscriber never acknowledges the message, the Pub/Sub
              # system will eventually redeliver the message.
          "labels": { # See  Creating and
              # managing labels.
            "a_key": "A String",
          },
          "pushConfig": { # Configuration for a push delivery endpoint. # If push delivery is used with this subscription, this field is
              # used to configure it. An empty `pushConfig` signifies that the subscriber
              # will pull and ack messages using API methods.
            "attributes": { # Endpoint configuration attributes.
                #
                # Every endpoint has a set of API supported attributes that can be used to
                # control different aspects of the message delivery.
                #
                # The currently supported attribute is `x-goog-version`, which you can
                # use to change the format of the pushed message. This attribute
                # indicates the version of the data expected by the endpoint. This
                # controls the shape of the pushed message (i.e., its fields and metadata).
                # The endpoint version is based on the version of the Pub/Sub API.
                #
                # If not present during the `CreateSubscription` call, it will default to
                # the version of the API used to make such call. If not present during a
                # `ModifyPushConfig` call, its value will not be changed. `GetSubscription`
                # calls will always return a valid version, even if the subscription was
                # created without this attribute.
                #
                # The possible values for this attribute are:
                #
                # * `v1beta1`: uses the push format defined in the v1beta1 Pub/Sub API.
                # * `v1` or `v1beta2`: uses the push format defined in the v1 Pub/Sub API.
              "a_key": "A String",
            },
            "oidcToken": { # Contains information needed for generating an # If specified, Pub/Sub will generate and attach an OIDC JWT token as an
                # `Authorization` header in the HTTP request for every pushed message.
                # [OpenID Connect
                # token](https://developers.google.com/identity/protocols/OpenIDConnect).
              "audience": "A String", # Audience to be used when generating OIDC token. The audience claim
                  # identifies the recipients that the JWT is intended for. The audience
                  # value is a single case-sensitive string. Having multiple values (array)
                  # for the audience field is not supported. More info about the OIDC JWT
                  # token audience here: https://tools.ietf.org/html/rfc7519#section-4.1.3
                  # Note: if not specified, the Push endpoint URL will be used.
              "serviceAccountEmail": "A String", # [Service account
                  # email](https://cloud.google.com/iam/docs/service-accounts)
                  # to be used for generating the OIDC token. The caller (for
                  # CreateSubscription, UpdateSubscription, and ModifyPushConfig RPCs) must
                  # have the iam.serviceAccounts.actAs permission for the service account.
            },
            "pushEndpoint": "A String", # A URL locating the endpoint to which messages should be pushed.
                # For example, a Webhook endpoint might use "https://example.com/push".
          },
          "topic": "A String", # The name of the topic from which this subscription is receiving messages.
              # Format is `projects/{project}/topics/{topic}`.
              # The value of this field will be `_deleted-topic_` if the topic has been
              # deleted.
          "messageRetentionDuration": "A String", # How long to retain unacknowledged messages in the subscription's backlog,
              # from the moment a message is published.
              # If `retain_acked_messages` is true, then this also configures the retention
              # of acknowledged messages, and thus configures how far back in time a `Seek`
              # can be done. Defaults to 7 days. Cannot be more than 7 days or less than 10
              # minutes.
          "retainAckedMessages": True or False, # Indicates whether to retain acknowledged messages. If true, then
              # messages are not expunged from the subscription's backlog, even if they are
              # acknowledged, until they fall out of the `message_retention_duration`
              # window. This must be true if you would like to
              #
              # Seek to a timestamp.
          "expirationPolicy": { # A policy that specifies the conditions for resource expiration (i.e., # A policy that specifies the conditions for this subscription's expiration.
              # A subscription is considered active as long as any connected subscriber is
              # successfully consuming messages from the subscription or is issuing
              # operations on the subscription. If `expiration_policy` is not set, a
              # *default policy* with `ttl` of 31 days will be used. The minimum allowed
              # value for `expiration_policy.ttl` is 1 day.
              # automatic resource deletion).
            "ttl": "A String", # Specifies the "time-to-live" duration for an associated resource. The
                # resource expires if it is not active for a period of `ttl`. The definition
                # of "activity" depends on the type of the associated resource. The minimum
                # and maximum allowed values for `ttl` depend on the type of the associated
                # resource, as well. If `ttl` is not set, the associated resource never
                # expires.
          },
        },
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # A subscription resource.
        "name": "A String", # The name of the subscription. It must have the format
            # `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
            # start with a letter, and contain only letters (`[A-Za-z]`), numbers
            # (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
            # plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters
            # in length, and it must not start with `"goog"`.
        "ackDeadlineSeconds": 42, # The approximate amount of time (on a best-effort basis) Pub/Sub waits for
            # the subscriber to acknowledge receipt before resending the message. In the
            # interval after the message is delivered and before it is acknowledged, it
            # is considered to be outstanding. During that time period, the
            # message will not be redelivered (on a best-effort basis).
            #
            # For pull subscriptions, this value is used as the initial value for the ack
            # deadline. To override this value for a given message, call
            # `ModifyAckDeadline` with the corresponding `ack_id` if using
            # non-streaming pull or send the `ack_id` in a
            # `StreamingModifyAckDeadlineRequest` if using streaming pull.
            # The minimum custom deadline you can specify is 10 seconds.
            # The maximum custom deadline you can specify is 600 seconds (10 minutes).
            # If this parameter is 0, a default value of 10 seconds is used.
            #
            # For push delivery, this value is also used to set the request timeout for
            # the call to the push endpoint.
            #
            # If the subscriber never acknowledges the message, the Pub/Sub
            # system will eventually redeliver the message.
        "labels": { # See  Creating and
            # managing labels.
          "a_key": "A String",
        },
        "pushConfig": { # Configuration for a push delivery endpoint. # If push delivery is used with this subscription, this field is
            # used to configure it. An empty `pushConfig` signifies that the subscriber
            # will pull and ack messages using API methods.
          "attributes": { # Endpoint configuration attributes.
              #
              # Every endpoint has a set of API supported attributes that can be used to
              # control different aspects of the message delivery.
              #
              # The currently supported attribute is `x-goog-version`, which you can
              # use to change the format of the pushed message. This attribute
              # indicates the version of the data expected by the endpoint. This
              # controls the shape of the pushed message (i.e., its fields and metadata).
              # The endpoint version is based on the version of the Pub/Sub API.
              #
              # If not present during the `CreateSubscription` call, it will default to
              # the version of the API used to make such call. If not present during a
              # `ModifyPushConfig` call, its value will not be changed. `GetSubscription`
              # calls will always return a valid version, even if the subscription was
              # created without this attribute.
              #
              # The possible values for this attribute are:
              #
              # * `v1beta1`: uses the push format defined in the v1beta1 Pub/Sub API.
              # * `v1` or `v1beta2`: uses the push format defined in the v1 Pub/Sub API.
            "a_key": "A String",
          },
          "oidcToken": { # Contains information needed for generating an # If specified, Pub/Sub will generate and attach an OIDC JWT token as an
              # `Authorization` header in the HTTP request for every pushed message.
              # [OpenID Connect
              # token](https://developers.google.com/identity/protocols/OpenIDConnect).
            "audience": "A String", # Audience to be used when generating OIDC token. The audience claim
                # identifies the recipients that the JWT is intended for. The audience
                # value is a single case-sensitive string. Having multiple values (array)
                # for the audience field is not supported. More info about the OIDC JWT
                # token audience here: https://tools.ietf.org/html/rfc7519#section-4.1.3
                # Note: if not specified, the Push endpoint URL will be used.
            "serviceAccountEmail": "A String", # [Service account
                # email](https://cloud.google.com/iam/docs/service-accounts)
                # to be used for generating the OIDC token. The caller (for
                # CreateSubscription, UpdateSubscription, and ModifyPushConfig RPCs) must
                # have the iam.serviceAccounts.actAs permission for the service account.
          },
          "pushEndpoint": "A String", # A URL locating the endpoint to which messages should be pushed.
              # For example, a Webhook endpoint might use "https://example.com/push".
        },
        "topic": "A String", # The name of the topic from which this subscription is receiving messages.
            # Format is `projects/{project}/topics/{topic}`.
            # The value of this field will be `_deleted-topic_` if the topic has been
            # deleted.
        "messageRetentionDuration": "A String", # How long to retain unacknowledged messages in the subscription's backlog,
            # from the moment a message is published.
            # If `retain_acked_messages` is true, then this also configures the retention
            # of acknowledged messages, and thus configures how far back in time a `Seek`
            # can be done. Defaults to 7 days. Cannot be more than 7 days or less than 10
            # minutes.
        "retainAckedMessages": True or False, # Indicates whether to retain acknowledged messages. If true, then
            # messages are not expunged from the subscription's backlog, even if they are
            # acknowledged, until they fall out of the `message_retention_duration`
            # window. This must be true if you would like to
            #
            # Seek to a timestamp.
        "expirationPolicy": { # A policy that specifies the conditions for resource expiration (i.e., # A policy that specifies the conditions for this subscription's expiration.
            # A subscription is considered active as long as any connected subscriber is
            # successfully consuming messages from the subscription or is issuing
            # operations on the subscription. If `expiration_policy` is not set, a
            # *default policy* with `ttl` of 31 days will be used. The minimum allowed
            # value for `expiration_policy.ttl` is 1 day.
            # automatic resource deletion).
          "ttl": "A String", # Specifies the "time-to-live" duration for an associated resource. The
              # resource expires if it is not active for a period of `ttl`. The definition
              # of "activity" depends on the type of the associated resource. The minimum
              # and maximum allowed values for `ttl` depend on the type of the associated
              # resource, as well. If `ttl` is not set, the associated resource never
              # expires.
        },
      }

`pull(subscription, body, x__xgafv=None)`

    Pulls messages from the server. The server may return `UNAVAILABLE` if
    there are too many concurrent pull requests pending for the given
    subscription.

    Args:
      subscription: string, The subscription from which messages should be pulled.
    Format is `projects/{project}/subscriptions/{sub}`. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # Request for the `Pull` method.
        "returnImmediately": True or False, # If this field set to true, the system will respond immediately even if
            # it there are no messages available to return in the `Pull` response.
            # Otherwise, the system may wait (for a bounded amount of time) until at
            # least one message is available, rather than returning no messages.
        "maxMessages": 42, # The maximum number of messages returned for this request. The Pub/Sub
            # system may return fewer than the number specified.
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Response for the `Pull` method.
        "receivedMessages": [ # Received Pub/Sub messages. The list will be empty if there are no more
            # messages available in the backlog. For JSON, the response can be entirely
            # empty. The Pub/Sub system may return fewer than the `maxMessages` requested
            # even if there are more messages available in the backlog.
          { # A message and its corresponding acknowledgment ID.
            "ackId": "A String", # This ID can be used to acknowledge the received message.
            "message": { # A message that is published by publishers and consumed by subscribers. The # The message.
                # message must contain either a non-empty data field or at least one attribute.
                # Note that client libraries represent this object differently
                # depending on the language. See the corresponding
                # client
                # library documentation for more information. See
                # Quotas and limits
                # for more information about message limits.
              "attributes": { # Optional attributes for this message.
                "a_key": "A String",
              },
              "data": "A String", # The message data field. If this field is empty, the message must contain
                  # at least one attribute.
              "publishTime": "A String", # The time at which the message was published, populated by the server when
                  # it receives the `Publish` call. It must not be populated by the
                  # publisher in a `Publish` call.
              "messageId": "A String", # ID of this message, assigned by the server when the message is published.
                  # Guaranteed to be unique within the topic. This value may be read by a
                  # subscriber that receives a `PubsubMessage` via a `Pull` call or a push
                  # delivery. It must not be populated by the publisher in a `Publish` call.
            },
          },
        ],
      }

`seek(subscription, body, x__xgafv=None)`

    Seeks an existing subscription to a point in time or to a given snapshot,
    whichever is provided in the request. Snapshots are used in
    Seek
    operations, which allow
    you to manage message acknowledgments in bulk. That is, you can set the
    acknowledgment state of messages in an existing subscription to the state
    captured by a snapshot. Note that both the subscription and the snapshot
    must be on the same topic.

    Args:
      subscription: string, The subscription to affect. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # Request for the `Seek` method.
        "snapshot": "A String", # The snapshot to seek to. The snapshot's topic must be the same as that of
            # the provided subscription.
            # Format is `projects/{project}/snapshots/{snap}`.
        "time": "A String", # The time to seek to.
            # Messages retained in the subscription that were published before this
            # time are marked as acknowledged, and messages retained in the
            # subscription that were published after this time are marked as
            # unacknowledged. Note that this operation affects only those messages
            # retained in the subscription (configured by the combination of
            # `message_retention_duration` and `retain_acked_messages`). For example,
            # if `time` corresponds to a point before the message retention
            # window (or to a point before the system's notion of the subscription
            # creation time), only retained messages will be marked as unacknowledged,
            # and already-expunged messages will not be restored.
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Response for the `Seek` method (this response is empty).
      }

`setIamPolicy(resource, body, x__xgafv=None)`

    Sets the access control policy on the specified resource. Replaces any
    existing policy.

    Args:
      resource: string, REQUIRED: The resource for which the policy is being specified.
    See the operation documentation for the appropriate value for this field. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # Request message for `SetIamPolicy` method.
        "policy": { # Defines an Identity and Access Management (IAM) policy. It is used to # REQUIRED: The complete policy to be applied to the `resource`. The size of
            # the policy is limited to a few 10s of KB. An empty policy is a
            # valid policy but certain Cloud Platform services (such as Projects)
            # might reject them.
            # specify access control policies for Cloud Platform resources.
            #
            #
            # A `Policy` consists of a list of `bindings`. A `binding` binds a list of
            # `members` to a `role`, where the members can be user accounts, Google groups,
            # Google domains, and service accounts. A `role` is a named list of permissions
            # defined by IAM.
            #
            # **JSON Example**
            #
            #     {
            #       "bindings": [
            #         {
            #           "role": "roles/owner",
            #           "members": [
            #             "user:mike@example.com",
            #             "group:admins@example.com",
            #             "domain:google.com",
            #             "serviceAccount:my-other-app@appspot.gserviceaccount.com"
            #           ]
            #         },
            #         {
            #           "role": "roles/viewer",
            #           "members": ["user:sean@example.com"]
            #         }
            #       ]
            #     }
            #
            # **YAML Example**
            #
            #     bindings:
            #     - members:
            #       - user:mike@example.com
            #       - group:admins@example.com
            #       - domain:google.com
            #       - serviceAccount:my-other-app@appspot.gserviceaccount.com
            #       role: roles/owner
            #     - members:
            #       - user:sean@example.com
            #       role: roles/viewer
            #
            #
            # For a description of IAM and its features, see the
            # [IAM developer's guide](https://cloud.google.com/iam/docs).
          "bindings": [ # Associates a list of `members` to a `role`.
              # `bindings` with no members will result in an error.
            { # Associates `members` with a `role`.
              "role": "A String", # Role that is assigned to `members`.
                  # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
              "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
                  # `members` can have the following values:
                  #
                  # * `allUsers`: A special identifier that represents anyone who is
                  #    on the internet; with or without a Google account.
                  #
                  # * `allAuthenticatedUsers`: A special identifier that represents anyone
                  #    who is authenticated with a Google account or a service account.
                  #
                  # * `user:{emailid}`: An email address that represents a specific Google
                  #    account. For example, `alice@gmail.com` .
                  #
                  #
                  # * `serviceAccount:{emailid}`: An email address that represents a service
                  #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
                  #
                  # * `group:{emailid}`: An email address that represents a Google group.
                  #    For example, `admins@example.com`.
                  #
                  #
                  # * `domain:{domain}`: The G Suite domain (primary) that represents all the
                  #    users of that domain. For example, `google.com` or `example.com`.
                  #
                "A String",
              ],
              "condition": { # Represents an expression text. Example: # The condition that is associated with this binding.
                  # NOTE: An unsatisfied condition will not allow user access via current
                  # binding. Different bindings, including their conditions, are examined
                  # independently.
                  #
                  #     title: "User account presence"
                  #     description: "Determines whether the request has a user account"
                  #     expression: "size(request.user) > 0"
                "location": "A String", # An optional string indicating the location of the expression for error
                    # reporting, e.g. a file name and a position in the file.
                "expression": "A String", # Textual representation of an expression in
                    # Common Expression Language syntax.
                    #
                    # The application context of the containing message determines which
                    # well-known feature set of CEL is supported.
                "description": "A String", # An optional description of the expression. This is a longer text which
                    # describes the expression, e.g. when hovered over it in a UI.
                "title": "A String", # An optional title for the expression, i.e. a short string describing
                    # its purpose. This can be used e.g. in UIs which allow to enter the
                    # expression.
              },
            },
          ],
          "version": 42, # Deprecated.
          "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
              # prevent simultaneous updates of a policy from overwriting each other.
              # It is strongly suggested that systems make use of the `etag` in the
              # read-modify-write cycle to perform policy updates in order to avoid race
              # conditions: An `etag` is returned in the response to `getIamPolicy`, and
              # systems are expected to put that etag in the request to `setIamPolicy` to
              # ensure that their change will be applied to the same version of the policy.
              #
              # If no `etag` is provided in the call to `setIamPolicy`, then the existing
              # policy is overwritten blindly.
        },
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Defines an Identity and Access Management (IAM) policy. It is used to
          # specify access control policies for Cloud Platform resources.
          #
          #
          # A `Policy` consists of a list of `bindings`. A `binding` binds a list of
          # `members` to a `role`, where the members can be user accounts, Google groups,
          # Google domains, and service accounts. A `role` is a named list of permissions
          # defined by IAM.
          #
          # **JSON Example**
          #
          #     {
          #       "bindings": [
          #         {
          #           "role": "roles/owner",
          #           "members": [
          #             "user:mike@example.com",
          #             "group:admins@example.com",
          #             "domain:google.com",
          #             "serviceAccount:my-other-app@appspot.gserviceaccount.com"
          #           ]
          #         },
          #         {
          #           "role": "roles/viewer",
          #           "members": ["user:sean@example.com"]
          #         }
          #       ]
          #     }
          #
          # **YAML Example**
          #
          #     bindings:
          #     - members:
          #       - user:mike@example.com
          #       - group:admins@example.com
          #       - domain:google.com
          #       - serviceAccount:my-other-app@appspot.gserviceaccount.com
          #       role: roles/owner
          #     - members:
          #       - user:sean@example.com
          #       role: roles/viewer
          #
          #
          # For a description of IAM and its features, see the
          # [IAM developer's guide](https://cloud.google.com/iam/docs).
        "bindings": [ # Associates a list of `members` to a `role`.
            # `bindings` with no members will result in an error.
          { # Associates `members` with a `role`.
            "role": "A String", # Role that is assigned to `members`.
                # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
            "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
                # `members` can have the following values:
                #
                # * `allUsers`: A special identifier that represents anyone who is
                #    on the internet; with or without a Google account.
                #
                # * `allAuthenticatedUsers`: A special identifier that represents anyone
                #    who is authenticated with a Google account or a service account.
                #
                # * `user:{emailid}`: An email address that represents a specific Google
                #    account. For example, `alice@gmail.com` .
                #
                #
                # * `serviceAccount:{emailid}`: An email address that represents a service
                #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
                #
                # * `group:{emailid}`: An email address that represents a Google group.
                #    For example, `admins@example.com`.
                #
                #
                # * `domain:{domain}`: The G Suite domain (primary) that represents all the
                #    users of that domain. For example, `google.com` or `example.com`.
                #
              "A String",
            ],
            "condition": { # Represents an expression text. Example: # The condition that is associated with this binding.
                # NOTE: An unsatisfied condition will not allow user access via current
                # binding. Different bindings, including their conditions, are examined
                # independently.
                #
                #     title: "User account presence"
                #     description: "Determines whether the request has a user account"
                #     expression: "size(request.user) > 0"
              "location": "A String", # An optional string indicating the location of the expression for error
                  # reporting, e.g. a file name and a position in the file.
              "expression": "A String", # Textual representation of an expression in
                  # Common Expression Language syntax.
                  #
                  # The application context of the containing message determines which
                  # well-known feature set of CEL is supported.
              "description": "A String", # An optional description of the expression. This is a longer text which
                  # describes the expression, e.g. when hovered over it in a UI.
              "title": "A String", # An optional title for the expression, i.e. a short string describing
                  # its purpose. This can be used e.g. in UIs which allow to enter the
                  # expression.
            },
          },
        ],
        "version": 42, # Deprecated.
        "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
            # prevent simultaneous updates of a policy from overwriting each other.
            # It is strongly suggested that systems make use of the `etag` in the
            # read-modify-write cycle to perform policy updates in order to avoid race
            # conditions: An `etag` is returned in the response to `getIamPolicy`, and
            # systems are expected to put that etag in the request to `setIamPolicy` to
            # ensure that their change will be applied to the same version of the policy.
            #
            # If no `etag` is provided in the call to `setIamPolicy`, then the existing
            # policy is overwritten blindly.
      }

`testIamPermissions(resource, body, x__xgafv=None)`

    Returns permissions that a caller has on the specified resource.
    If the resource does not exist, this will return an empty set of
    permissions, not a NOT_FOUND error.

    Note: This operation is designed to be used for building permission-aware
    UIs and command-line tools, not for authorization checking. This operation
    may "fail open" without warning.

    Args:
      resource: string, REQUIRED: The resource for which the policy detail is being requested.
    See the operation documentation for the appropriate value for this field. (required)
      body: object, The request body. (required)
        The object takes the form of:

    { # Request message for `TestIamPermissions` method.
        "permissions": [ # The set of permissions to check for the `resource`. Permissions with
            # wildcards (such as '*' or 'storage.*') are not allowed. For more
            # information see
            # [IAM Overview](https://cloud.google.com/iam/docs/overview#permissions).
          "A String",
        ],
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Response message for `TestIamPermissions` method.
        "permissions": [ # A subset of `TestPermissionsRequest.permissions` that the caller is
            # allowed.
          "A String",
        ],
      }