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.. _alembic.config.toplevel: ============== Configuration ============== .. note:: this section discusses the **internal API of Alembic** as regards internal configuration constructs. This section is only useful for developers who wish to extend the capabilities of Alembic. For documentation on configuration of an Alembic environment, please see :doc:`/tutorial`. The :class:`.Config` object represents the configuration passed to the Alembic environment. From an API usage perspective, it is needed for the following use cases: * to create a :class:`.ScriptDirectory`, which allows you to work with the actual script files in a migration environment * to create an :class:`.EnvironmentContext`, which allows you to actually run the ``env.py`` module within the migration environment * to programatically run any of the commands in the :ref:`alembic.command.toplevel` module. The :class:`.Config` is *not* needed for these cases: * to instantiate a :class:`.MigrationContext` directly - this object only needs a SQLAlchemy connection or dialect name. * to instantiate a :class:`.Operations` object - this object only needs a :class:`.MigrationContext`. .. automodule:: alembic.config :members: