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41 lines
1.3 KiB
ReStructuredText
41 lines
1.3 KiB
ReStructuredText
=======
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asyncio
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=======
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.. versionadded:: 2.0
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Scrapy has partial support :mod:`asyncio`. After you :ref:`install the asyncio
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reactor <install-asyncio>`, you may use :mod:`asyncio` and
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:mod:`asyncio`-powered libraries in any :doc:`coroutine <coroutines>`.
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.. warning:: :mod:`asyncio` support in Scrapy is experimental. Future Scrapy
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versions may introduce related changes without a deprecation
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period or warning.
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.. _install-asyncio:
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Installing the asyncio reactor
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==============================
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To enable :mod:`asyncio` support, set the :setting:`TWISTED_REACTOR` setting to
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``'twisted.internet.asyncioreactor.AsyncioSelectorReactor'``.
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If you are using :class:`~scrapy.crawler.CrawlerRunner`, you also need to
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install the :class:`~twisted.internet.asyncioreactor.AsyncioSelectorReactor`
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reactor manually. You can do that using
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:func:`~scrapy.utils.reactor.install_reactor`::
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install_reactor('twisted.internet.asyncioreactor.AsyncioSelectorReactor')
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.. _using-custom-loops:
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Using custom asyncio loops
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==========================
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You can also use custom asyncio event loops with the asyncio reactor. Set the
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:setting:`ASYNCIO_EVENT_LOOP` setting to the import path of the desired event loop class to
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use it instead of the default asyncio event loop.
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