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Microsoft Azure Event Hubs Client Library for Python
Last release 11 months ago
30 Oct 2025
Ships fairly regularly
a new release about every 2 months
Nearly every release is documented
notes for 37 of 39 stable releases
Nothing withdrawn
no release was ever pulled
8 years old
66 releases · first in 2018
Fixed a bug in the EventHub client where the maximum message size negotiation during the AMQP attach frame was handled incorrectly. The client now cor
Deprecating uamqp_transport in favor of pyAMQP transport. The uamqp_transport will be removed in the next minor release.
One column per quarter.
from_bytes to EventData to create from a message payload of bytes. (#39711)uamqp_transport in favor of pyAMQP transport. The uamqp_transport will be removed in the next minor release.AmqpOverWebsocket no longer requires separate optional dependency installations.Implemented a new websockets library so that using AmqpOverWebsocket no longer requires separate optional dependency installations.
AmqpOverWebsocket no longer requires separate optional dependency installations.Added support for geo-replication and disaster recovery-enabled Event Hubs. To learn more about geo-replication, refer to this doc. To enable geo-repl
Add support for Decimal128 in pyAMQP
Added ssl_context parameter to the clients to allow users to pass in the SSL context, in which case, connection_verify will be ignored if specified.
ssl_context parameter to the clients to allow users to pass in the SSL context, in which case, connection_verify will be ignored if specified.Nothing published for this version
Implemented backpressure for async consumer to address a memory leak issue.
Fixed a bug where the correct URI was not being used for consumer authentication, causing issues when assigning roles at the consumer group level.
Added support for non-tls connections
Fixed a bug where using EventHubProducerClient in buffered mode could potentially drop a buffered message without actually sending it.
EventHubProducerClient in buffered mode could potentially drop a buffered message without actually sending it. (#34712)None values in AMQP connection info with empty strings as per the OpenTelemetry specification.This version and all future versions will require Python 3.8+. Python 3.7 is no longer supported.
This version and all future versions will require Python 3.8+. Python 3.7 is no longer supported.
keep_alive functionality on EventHubProducerClient to allow for long-living producers. #33726Fixed a pyAMQP error where events split across multiple TransferFrames were depleting the link credit by more than 1 credit per message.
A new float keyword argument socket_timeout has been added to the sync and async EventHubConsumerClient and EventHubProducerClient.
socket_timeout has been added to the sync and async EventHubConsumerClient and EventHubProducerClient.BlobCheckpointStore was reprocessing old events after an error.Fixed the error end frame received on invalid channel which was raised when a disconnect was sent by the service
end frame received on invalid channel which was raised when a disconnect was sent by the service (#30860)link already closed which was raised when the client was closing and disconnecting from the service (#30836)Azure.EventHubs.send to EventHubs.sendAzure.EventHubs.message to EventHubs.messageAzure.EventHubs.process to EventHubs.processEventHubs.receive span will be created upon receiving events.messaging.system - messaging system (i.e., eventhubs)messaging.operation - type of operation (i.e., publish, receive, or process)messaging.batch.message_count - number of messages sent, received, or processed (if more than one)component attribute was removed from all spans.send spans now contain links to message spans. Now, message spans will no longer contain a link to the send span.traceparent (and tracestate if applicable)Fixed a bug that would prevent reconnect after a long idle period, network drop (issue #28996)
Fixed a bug where, when websocket-client was not installed, the error was not caught/raised properly (issue #28453).
websocket-client was not installed, the error was not caught/raised properly (issue #28453).The message attribute on EventData/EventDataBatch, which previously exposed the uamqp.Message, has been deprecated.
Version 5.11.0 is our first stable release of the Azure Event Hubs client library based on a pure Python implemented AMQP stack.
uamqp_transport has been added to sync and async EventHubProducerClient/EventHubConsumerClient constructors which indicates whether to use the uamqp library or the default pure Python AMQP library as the underlying transport.EventHubSharedKeyCredential returned an AccessToken.token of type bytes and not str, now matching the documentation.message attribute on EventData/EventDataBatch, which previously exposed the uamqp.Message, has been deprecated.
LegacyMessage/LegacyBatchMessage objects returned by the message attribute on EventData/EventDataBatch have been introduced to help facilitate the transition.uamqp >= 1.6.3 as an optional dependency for use with the uamqp_transport keyword.
This version and all future versions will require Python 3.7+, Python 3.6 is no longer supported.
This version and all future versions will require Python 3.7+, Python 3.6 is no longer supported.
BufferedProducer that would block when flushing the queue causing the client to freeze up (issue #23510).EventHubProducerClient and EventHubConsumerClient that set the default value of the transport_type parameter in the from_connection_string methods to None rather than TransportType.Amqp.Includes the following features related to buffered sending of events:
send_event to EventHubProducerClient which allows sending single EventData or AmqpAnnotatedMessage.EventHubProducerClient which is intended to allow for efficient publishing of events
without having to explicitly manage batches in the application.
EventHubProducerClient and from_connection_string method takes the following new keyword arguments
for configuration:
buffered_mode: The flag to enable/disable buffered mode sending.on_success: The callback to be called once events have been successfully published.on_error: The callback to be called once events have failed to be published.max_buffer_length: The total number of events per partition that can be buffered before a flush will be triggered.max_wait_time: The amount of time to wait for a batch to be built with events in the buffer before publishing.EventHubProducerClient.flush which flushes events in the buffer to be sent immediately.EventHubProducerClient.get_buffered_event_count which returns the number of events that are buffered and waiting to be published for a given partition.EventHubProducerClient.total_buffered_event_count which returns the total number of events that are currently buffered and waiting to be published, across all partitions.flush to EventHubProducerClient.close which indicates whether to flush the buffer or not while closing.The classmethod from_message_content has been added to EventData for interoperability with the Schema Registry Avro Encoder library, and takes content
from_message_content has been added to EventData for interoperability with the Schema Registry Avro Encoder library, and takes content and content_type as positional parameters.Introduced new method send_event to EventHubProducerClient which allows sending single EventData or AmqpAnnotatedMessage.
send_event to EventHubProducerClient which allows sending single EventData or AmqpAnnotatedMessage.EventHubProducerClient which is intended to allow for efficient publishing of events
without having to explicitly manage batches in the application.
EventHubProducerClient and from_connection_string method now takes the following new keyword arguments
for configuration:
buffered_mode: The flag to enable/disable buffered mode sending.on_success: The callback to be called once events have been successfully published.on_error: The callback to be called once events have failed to be published.max_buffer_length: The total number of events per partition that can be buffered before a flush will be triggered.max_wait_time: The amount of time to wait for a batch to be built with events in the buffer before publishing.EventHubProducerClient.flush which flushes events in the buffer to be sent immediately.EventHubProducerClient.get_buffered_event_count which returns the number of events that are buffered and waiting to be published for a given partition.EventHubProducerClient.total_buffered_event_count which returns the total number of events that are currently buffered and waiting to be published, across all partitions.flush to EventHubProducerClient.close which indicates whether to flush the buffer or not while closing.EventData internals for interoperability with the Schema Registry Avro Encoder library.from_message_data on EventData has been renamed from_message_content for interoperability with the Schema Registry Avro Encoder library. The data para
from_message_data on EventData has been renamed from_message_content for interoperability with the Schema Registry Avro Encoder library. The data parameter has been renamed to content.The following features have been temporarily pulled out of async EventHubProducerClient and EventHubConsumerClient which will be added back in future
EventHubProducerClient and EventHubConsumerClient which will be added back in future previews as we work towards a stable release:
from_connection_string methods of the EventHubProducerClient and EventHubConsumerClient is not supported: transport_type, http_proxy, custom_endpoint_address, and connection_verify.Updated the optional dependency for async transport using AMQP over WebSocket from websocket-client to aiohttp (Issue #24315, thanks @hansmbakker for
websocket-client to aiohttp (Issue #24315, thanks @hansmbakker for the suggestion).This version and all future versions will require Python 3.7+. Python 3.6 is no longer supported.
This version and all future versions will require Python 3.7+. Python 3.6 is no longer supported.
uamqp_transport optional parameter to the clients, to allow switching to the uamqp library as the transport.Fixed bug that prevented token refresh at regular intervals.
Added support for connection using websocket and http proxy.
Improved the performance of async sending and receiving.
Added support for async EventHubProducerClient and EventHubConsumerClient.
EventHubProducerClient and EventHubConsumerClient.Version 5.8.0a1 is our first efforts to build an Azure Event Hubs client library based on pure python implemented AMQP stack.
Version 5.8.0a1 is our first efforts to build an Azure Event Hubs client library based on pure python implemented AMQP stack.
from_connection_string methods of the EventHubProducerClient and EventHubConsumerClient is not supported: transport_type, http_proxy, custom_endpoint_address, and connection_verify.This version and all future versions will require Python 3.6+. Python 2.7 is no longer supported.
This version and all future versions will require Python 3.6+. Python 2.7 is no longer supported.
EventHubProducerClient and EventHubConsumerClient constructors and from_connection_string take retry_mode as a keyword argument.EventHubProducerClient could be reopened for sending events instead of encountering with KeyError when the client is previously closed (issue #21849).Fixed a bug for checking that azure.eventhub.amqp.AmqpMessageHeader and azure.eventhub.amqp.AmqpMessageProperties contain specific properties using th
azure.eventhub.amqp.AmqpMessageHeader and azure.eventhub.amqp.AmqpMessageProperties contain specific properties using the in keyword.Added support for sending AMQP annotated message which allows full access to the AMQP message fields.
azure.eventhub.amqp.azure.eventhub.amqp.AmqpMessageBodyType to represent the body type of the message which includes:
DATA: The body of message consists of one or more data sections and each section contains opaque binary data.SEQUENCE: The body of message consists of one or more sequence sections and each section contains an arbitrary number of structured data elements.VALUE: The body of message consists of one amqp-value section and the section contains a single AMQP value.azure.eventhub.amqp.AmqpAnnotatedMessage for accessing low-level amqp message sections which can be instantiated for sending.azure.eventhub.amqp.AmqpMessageHeader and azure.eventhub.amqp.AmqpMessageProperties for accessing amqp header and properties.body_type on azure.eventhub.EventData which returns azure.eventhub.amqp.AmqpMessageBodyType.raw_amqp_message on azure.eventhub.EventData which returns azure.eventhub.amqp.AmqpAnnotatedMessage.Added support for using azure.core.credentials.AzureNamedKeyCredential as credential for authenticating producer and consumer clients.
New Features
azure.core.credentials.AzureNamedKeyCredential as credential for authenticating producer and consumer clients.Bug Fixes
Notes
This version follows from version 5.3.1, rather than 5.4.0b1 so that the preview idempotent producer feature is not included.
This version follows from version 5.3.1, rather than 5.4.0b1 so that the preview idempotent producer feature is not included.
New Features
azure.core.credentials.AzureSasCredential as credential for authenticating producer and consumer clients.list_ownership, claim_ownership, update_checkpoint, list_checkpoints on sync and async CheckpointStore to support taking **kwargs.
**kwargs in the methods listed previously will result in the following pylint error: W0221: Parameters differ from overridden ________ method (arguments-differ).update_checkpoint on sync and async PartitionContext to support taking **kwargs.Bug Fixes
Notes
This version and all future versions will require Python 2.7 or Python 3.6+, Python 3.5 is no longer supported.
This version and all future versions will require Python 2.7 or Python 3.6+, Python 3.5 is no longer supported.
New Features
EventHubProducerClient constructor accepts two new parameters for idempotent publishing:
enable_idempotent_partitions: A boolean value to tell the EventHubProducerClient whether to enable idempotency.partition_config: The set of configurations that can be specified to influence publishing behavior
specific to the configured Event Hub partition.get_partition_publishing_properties on EventHubProducerClient to inspect the information
about the state of publishing for a partition.published_sequence_number on EventData to get the publishing sequence number assigned
to the event at the time it was successfully published.starting_published_sequence_number on EventDataBatch to get the publishing sequence
number assigned to the first event in the batch at the time the batch was successfully published.azure.eventhub.PartitionPublishingConfiguration which is a set of configurations that can be
specified to influence the behavior when publishing directly to an Event Hub partition.Notes
This version will be the last version to officially support Python 3.5, future versions will require Python 2.7 or Python 3.6+.
This version will be the last version to officially support Python 3.5, future versions will require Python 2.7 or Python 3.6+.
Bug fixes
event_data_batch will be a no-op now instead of raising error.Added a parse_connection_string method which parses a connection string into a properties bag, EventHubConnectionStringProperties, containing its comp
New Features
parse_connection_string method which parses a connection string into a properties bag, EventHubConnectionStringProperties, containing its component parts.from_connection_string method of EventHubConsumerClient and EventHubProducerClient now accept two new optional arguments:
custom_endpoint_address which allows for specifying a custom endpoint to use when communicating with the Event Hubs service,
and is useful when your network does not allow communicating to the standard Event Hubs endpoint.connection_verify which allows for specifying the path to the custom CA_BUNDLE file of the SSL certificate which is used to authenticate
the identity of the connection endpoint.Notes
Updated azure.eventhub.extension.__init__.py to be compatible with pkgutil-style namespace (PR #13210, thanks @pjachowi).
Bug fixes
azure.eventhub.extension.__init__.py to be compatible with pkgutil-style namespace (PR #13210, thanks @pjachowi).uamqp.ReceiveClient and uamqp.ReceiveClientAsync receive messages during connection establishment (#15555).Connection strings used with from_connection_string methods now supports using the SharedAccessSignature key in leiu of sharedaccesskey and sharedacce
New Features
from_connection_string methods now supports using the SharedAccessSignature key in leiu of sharedaccesskey and sharedaccesskeyname, taking the string of the properly constructed token as value.EventHubConsumerClient constructor accepts two new parameters for the load balancer.
New Features
EventHubConsumerClient constructor accepts two new parameters for the load balancer.
load_balancing_strategy, which can be "greedy" or "balanced".
With greedy strategy, one execution of load balancing will claim as many partitions as required to balance the load
whereas with balanced strategy one execution of load balancing will claim at most 1 partition.partition_ownership_expiration_interval, which allows you to customize the partition ownership expiration for load balancing.
A consumer client may lose its owned partitions more often with a smaller expiration interval. But a larger interval
may result in idle partitions not being claimed for longer time.azure.eventhub.LoadBalancingStrategy for load_balancing_strategy.EventHubProducerClient.send_batch accepts either an EventDataBatch or a finite list of EventData. #9181
New Features
EventHubProducerClient.send_batch accepts either an EventDataBatch or a finite list of EventData. #9181Bug fixes
azure.eventhub.EventhubConsumerClient into an exclusive receiver when it has no checkpoint store. #11181logging_enable to True in EventHubConsumerClient and EventHubProducerClient.Added EventHubConsumerClient.receive_batch() to receive and process events in batches instead of one by one. #9184
New Features
EventHubConsumerClient.receive_batch() to receive and process events in batches instead of one by one. #9184EventHubConsumerCliuent.receive() has a new param max_wait_time.
on_event is called every max_wait_time when no events are received and max_wait_time is not None or 0.PartitionContext.update_checkpoint is now optional. The last received event is used when param event is not passed in.EventData.system_properties has added missing properties when consuming messages from IotHub. #10408Fixed a bug that swallowed errors when receiving events with azure.eventhub.EventHubConsumerClient #9660
Bug fixes
azure.eventhub.EventHubConsumerClient #9660get_eventhub_properties, get_partition_ids, and get_partition_properties to raise
an error on Azure Stack #9920Removed deprecated property application_properties and deprecated method encode_message().
Breaking changes
EventData
application_properties and deprecated method encode_message().EventHubConsumerClient
on_error would be called when EventHubConsumerClient failed to claim ownership of partitions.on_partition_close and on_partition_initialize would be called in the case of exceptions raised by on_event callback.
EventHubConsumerClient would close and re-open the internal partition receiver in this case.EventHubConsumerClient should resume receiving after recovering from an error has been re-prioritized.
starting_position is provided, it will resume from starting_posititon.starting_position, it will resume from the latest position.PartitionContext
update_checkpoint would do in-memory checkpoint instead of doing nothing when checkpoint store is not explicitly provided.
EventHubConsumerClient receiving recovering.get_partition_ids, get_partition_properties, get_eventhub_properties would raise error in the case of service returning an error status code.
AuthenticationError would be raised when service returning error code 401.ConnectError would be raised when service returning error code 404.EventHubError would be raised when service returning other error codes.All exceptions should now be imported from azure.eventhub.exceptions.
Breaking changes
azure.eventhub.exceptions.EventHubSharedKeyCredential objects for synchronous and asynchronous operations.
For async, import the credentials object from the azure.eventhub.aio namespace.EventData
application_properties to properties.EventData no longer has attribute last_enqueued_event_properties - use this on PartitionContext instead.EvenDataBatch
EventDataBatch.try_add has been renamed to EventDataBatch.add.size to size_in_bytes.max_size to max_size_in_bytes.EventHubConsumerClient and EventHubProducerClient
get_properties to get_eventhub_properties.host to fully_qualified_namespace, event_hub_path to eventhub_name.get_partition_properties: partition to partition_id.consumer_group_name to consumer_group and moved that parameter from receive method to the constructor of EventHubConsumerClient.initial_event_position to starting_position on the receive method of EventHubConsumerClient.event_hub_path to eventhub_name in constructor and from_connection_string method of the client object.EventHubProducerClient.send has been renamed to send_batch which will only accept EventDataBatch object as input.EventHubProducerClient.create_batch now also takes the partition_id and partition_key as optional parameters (which are no longer specified at send).PartitionManager to CheckpointStore.on_event and now operates on a single event rather than a list of events.EventPostition.
starting_position parameter of the receive method accepts offset(str), sequence number(int), datetime (datetime.datetime) or dict of these types.starting_position_inclusive parameter of the receive method accepts bool or dict indicating whether the given event position is inclusive or not.PartitionContext no longer has attribute owner_id.PartitionContext now has attribute last_enqueued_event_properties which is populated if track_last_enqueued_event_properties is set to True in the receive method.New features
idle_timeout in construct and from_connection_string to EventHubConsumerClient and EventHubProducerClient
after which the underlying connection will close if there is no further activity.EventHubClient, EventHubConsumer and EventHubProducer has been removed. Use EventHubProducerClient and EventHubConsumerClient instead.
Breaking changes
EventHubClient, EventHubConsumer and EventHubProducer has been removed. Use EventHubProducerClient and EventHubConsumerClient instead.
EventHubProducerClient as substitution forEventHubProducer.
EventHubProducerClient supports sending events to different partitions.EventHubConsumerClient as substitution for EventHubConsumer.
EventHubConsumerClient supports receiving events from single/all partitions.EventData, all receiving is done via callback method: on_events.EventHubConsumerClient has taken on the responsibility of EventProcessor.
EventHubConsumerClient now accepts PartitionManager to do load-balancing and checkpoint.PartitionProcessorby four independent callback methods accepted by the receive method on EventHubConsumerClient.
on_events(partition_context, events) called when events are received.on_error(partition_context, exception called when errors occur.on_partition_initialize(partition_context) called when a partition consumer is opened.on_partition_close(partition_context, reason) called when a partition consumer is closed.azure.eventhub.common has been removed. Import from azure.eventhub instead.azure.eventhub.client_abstract has been removed. Use azure.eventhub.EventHubProducerClient or azure.eventhub.EventHubConsumerClient instead.azure.eventhub.client has been removed. Use azure.eventhub.EventHubProducerClient or azure.eventhub.EventHubConsumerClient instead.azure.eventhub.producer has been removed. Use azure.eventhub.EventHubProducerClient instead.azure.eventhub.consumer has been removed. Use azure.eventhub.EventHubConsumerClient instead.azure.eventhub.aio.client_async has been removed. Use azure.eventhub.aio.EventHubProducerClient or azure.eventhub.aio.EventHubConsumerClient instead.azure.eventhub.aio.producer_async has been removed. Use azure.eventhub.aio.EventHubProducerClient instead.azure.eventhub.aio.consumer_async has been removed. Use azure.eventhub.aio.EventHubConsumerClient instead.azure.eventhub.aio.event_processor.event_processor has been removed. Use azure.eventhub.aio.EventHubConsumerClient instead.azure.eventhub.aio.event_processor.partition_processor has been removed. Use callback methods instead.azure.eventhub.aio.event_processor.partition_manager has been removed. Import from azure.eventhub.aio instead.azure.eventhub.aio.event_processor.partition_context has been removed. Import from azure.eventhub.aio instead.azure.eventhub.aio.event_processor.sample_partition_manager has been removed.Bug fixes
Added support for tracing (issue #7153).
New features
EventHubConsumer .
track_last_enqueued_event_properties in method EventHubClient.create_consumer().last_enqueued_event_properties of EventHubConsumer which contains sequence_number, offset, enqueued_time and retrieval_time information.Breaking changes
EventHubClient and read properties or events from an IoT Hub.exception in method close() of EventHubConsumer and EventHubProcuer.Added support for automatic load balancing among multiple EventProcessor.
New features
EventProcessor.BlobPartitionManager which implements PartitionManager.
EventProcessor.EventProcessor.system_properties on EventData.Breaking changes
PartitionProcessor. For initialization please implement the method initialize.CheckpointManager by PartitionContext.
PartitionContext has partition context information and method update_checkpoint.PartitionProcessor to include PartitionContext as part of the arguments.EventHub/EventHubConsumer/EventHubProducerto be private.azure.eventhub.eventprocessor under aio package, which now becomes azure.eventhub.aio.eventprocessor.Added method create_batch on the EventHubProducer to create an EventDataBatch that can then be used to add events until the maximum size is reached.
New features
create_batch on the EventHubProducer to create an EventDataBatch that can then be used to add events until the maximum size is reached.
send() method to send all the added events to Event Hubs.retry_total: The total number of attempts to redo the failed operation.backoff_factor: The delay time factor.backoff_max: The maximum delay time in total.EventHubClient.OperationTimeoutError for send operation.EventProcessor which replaces the older concept of Event Processor Host. This early preview is intended to allow users to test the new design using a single instance of EventProcessor. The ability to checkpoints to a durable store will be added in future updates.
EventProcessor: EventProcessor creates and runs consumers for all partitions of the eventhub.PartitionManager: PartitionManager defines the interface for getting/claiming ownerships of partitions and updating checkpoints.PartitionProcessor: PartitionProcessor defines the interface for processing events.CheckpointManager: CheckpointManager takes responsibility for updating checkpoints during events processing.Breaking changes
EventProcessorHost was replaced by EventProcessor, please read the new features for details.max_retries configuration parameter of the EventHubClient with retry_total.Version 5.0.0b1 is a preview of our efforts to create a client library that is user friendly and idiomatic to the Python ecosystem. The reasons for mo
Version 5.0.0b1 is a preview of our efforts to create a client library that is user friendly and idiomatic to the Python ecosystem. The reasons for most of the changes in this update can be found in the Azure SDK Design Guidelines for Python. For more information, please visit https://aka.ms/azure-sdk-preview1-python.
New features
credential: The credential object used for authentication which implements TokenCredential interface of getting tokens.transport_type: The type of transport protocol that will be used for communicating with the Event Hubs service.max_retries: The max number of attempts to redo the failed operation when an error happened.get_partition_properties and get_partition_ids to EventHubClient.Breaking changes
azure.error.EventHubErrorazure.error.ConnectionLostErrorazure.error.ConnectErrorazure.error.AuthenticationErrorazure.error.EventDataErrorazure.error.EventDataSendErroradd_sender to create_producer and add_receiver to create_consumer in EventHubClient.get_eventhub_info to get_properties of EventHubClient.Nothing published for this version
Nothing published for this version
Fixed bug where datetime offset filter was using a local timestamp rather than UTC.
BugFixes
Added support for auto reconnect on token expiration and other auth errors (issue #89).
BugFixes
Features
Support for Python 2.7 in azure.eventhub module (azure.eventprocessorhost will not support Python 2.7).
Code | Docs
Support: Active
Azure Blob Storage Checkpoint Store AIO
azure-eventhub-checkpointstoreblob-aio
Nothing published for this version
Fixed bug in Azure namespace package.
Changes to AzureStorageCheckpointLeaseManager parameters to support other connection options (issue #61):
Changes to AzureStorageCheckpointLeaseManager parameters to support other connection options (issue #61):
storage_account_name, storage_account_key and lease_container_name arguments are now optional keyword arguments.sas_token argument that must be specified with storage_account_name in place of storage_account_key.endpoint_suffix argument to support storage endpoints in National Clouds.connection_string argument that, if specified, overrides all other endpoint arguments.lease_container_name argument now defaults to "eph-leases" if not specified.Fix for clients failing to start if run called multipled times (issue #64).
Added convenience methods body_as_str and body_as_json to EventData object for easier processing of message data.
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