BaseUpdateProcessor

class telegram.ext.BaseUpdateProcessor(max_concurrent_updates)

Bases: typing.AsyncContextManager, ABC

An abstract base class for update processors. You can use this class to implement your own update processor.

Instances of this class can be used as asyncio context managers, where

async with processor:
    # code

is roughly equivalent to

try:
    await processor.initialize()
    # code
finally:
    await processor.shutdown()

Use In

telegram.ext.ApplicationBuilder.concurrent_updates()

Available In

telegram.ext.Application.update_processor

See also

__aenter__() and __aexit__().

See also

Concurrency

Added in version 20.4.

Parameters:

max_concurrent_updates (int) – The maximum number of updates to be processed concurrently. If this number is exceeded, new updates will be queued until the number of currently processed updates decreases.

Raises:

ValueError – If max_concurrent_updates is a non-positive integer.

async __aenter__()

Asynchronous context manager which initializes the Processor.

Returns:

The initialized Processor instance.

Raises:

Exception – If an exception is raised during initialization, shutdown() is called in this case.

async __aexit__(exc_type, exc_val, exc_tb)

Asynchronous context manager which shuts down the Processor.

abstract async do_process_update(update, coroutine)

Custom implementation of how to process an update. Must be implemented by a subclass.

Warning

This method will be called by process_update(). It should not be called manually.

Parameters:

• update (object) – The update to be processed.

• coroutine (Awaitable) – The coroutine that will be awaited to process the update.

abstract async initialize()

Initializes the processor so resources can be allocated. Must be implemented by a subclass.

See also

shutdown()

property max_concurrent_updates

The maximum number of updates that can be processed concurrently.

Type:

int

final async process_update(update, coroutine)

Calls do_process_update() with a semaphore to limit the number of concurrent updates.

Parameters:

• update (object) – The update to be processed.

• coroutine (Awaitable) – The coroutine that will be awaited to process the update.

abstract async shutdown()

Shutdown the processor so resources can be freed. Must be implemented by a subclass.

See also

initialize()