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.. change::
:tags: feature, engine, orm
:tickets: 3414
SQLAlchemy now includes support for Python asyncio within both Core and
ORM, using the included :ref:`asyncio extension <asyncio_toplevel>`. The
extension makes use of the `greenlet
<https://greenlet.readthedocs.io/en/latest/>`_ library in order to adapt
SQLAlchemy's sync-oriented internals such that an asyncio interface that
ultimately interacts with an asyncio database adapter is now feasible. The
single driver supported at the moment is the
:ref:`dialect-postgresql-asyncpg` driver for PostgreSQL.
.. seealso::
:ref:`change_3414`
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