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Extend FAQ with CancelledError causes
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@ -186,6 +186,60 @@ From it, you're also able to call other ``async def`` without having to touch :f
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Be sure to read the :mod:`asyncio` documentation if you want a better understanding of event loop, tasks, and what functions you can use.
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KeyboardInterrupt during handling of asyncio.exceptions.CancelledError
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----------------------------------------------------------------------
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This is probably not an actual error, but rather the default way most :mod:`asyncio`-based programs exit.
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You can verify this running the following code:
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.. code-block:: python
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import asyncio
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asyncio.run(asyncio.sleep(86400))
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and pressing :kbd:`Control+C` on your keyboard while it's running, which should print something similar to:
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.. code-block:: text
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Traceback (most recent call last):
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File ".../Python/Python312/Lib/asyncio/runners.py", line 118, in run
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return self._loop.run_until_complete(task)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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File ".../Python/Python312/Lib/asyncio/base_events.py", line 685, in run_until_complete
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return future.result()
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^^^^^^^^^^^^^^^
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File ".../Python/Python312/Lib/asyncio/tasks.py", line 665, in sleep
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return await future
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^^^^^^^^^^^^
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asyncio.exceptions.CancelledError
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During handling of the above exception, another exception occurred:
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Traceback (most recent call last):
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File ".../mycode.py", line 3, in <module>
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asyncio.run(asyncio.sleep(86400))
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File ".../Python/Python312/Lib/asyncio/runners.py", line 194, in run
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return runner.run(main)
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^^^^^^^^^^^^^^^^
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File ".../Python/Python312/Lib/asyncio/runners.py", line 123, in run
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raise KeyboardInterrupt()
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KeyboardInterrupt
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Note how there is a very large error even though Telethon was not involved at all.
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When you press :kbd:`Control+C` while Telethon is running, you should see a similar error, as expected.
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If you do not want to see this error when stopping your program, wrap the call to :func:`asyncio.run` in a ``try / except``:
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.. code-block:: python
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try:
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asyncio.run(main())
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except KeyboardInterrupt:
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pass
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Telethon does not catch :class:`KeyboardInterrupt` itself to give you the option to handle it in any way you prefer.
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Can Telethon also do this thing the official clients do?
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--------------------------------------------------------
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