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Metadata-Version: 1.1
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Name: alembic
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Version: 0.6.5
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Summary: A database migration tool for SQLAlchemy.
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Home-page: http://bitbucket.org/zzzeek/alembic
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Author: Mike Bayer
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Author-email: mike@zzzcomputing.com
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License: MIT
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Description: Alembic is a new database migrations tool, written by the author
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of `SQLAlchemy <http://www.sqlalchemy.org>`_. A migrations tool
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offers the following functionality:
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* Can emit ALTER statements to a database in order to change
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the structure of tables and other constructs
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* Provides a system whereby "migration scripts" may be constructed;
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each script indicates a particular series of steps that can "upgrade" a
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target database to a new version, and optionally a series of steps that can
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"downgrade" similarly, doing the same steps in reverse.
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* Allows the scripts to execute in some sequential manner.
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The goals of Alembic are:
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* Very open ended and transparent configuration and operation. A new
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Alembic environment is generated from a set of templates which is selected
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among a set of options when setup first occurs. The templates then deposit a
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series of scripts that define fully how database connectivity is established
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and how migration scripts are invoked; the migration scripts themselves are
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generated from a template within that series of scripts. The scripts can
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then be further customized to define exactly how databases will be
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interacted with and what structure new migration files should take.
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* Full support for transactional DDL. The default scripts ensure that all
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migrations occur within a transaction - for those databases which support
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this (Postgresql, Microsoft SQL Server), migrations can be tested with no
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need to manually undo changes upon failure.
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* Minimalist script construction. Basic operations like renaming
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tables/columns, adding/removing columns, changing column attributes can be
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performed through one line commands like alter_column(), rename_table(),
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add_constraint(). There is no need to recreate full SQLAlchemy Table
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structures for simple operations like these - the functions themselves
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generate minimalist schema structures behind the scenes to achieve the given
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DDL sequence.
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* "auto generation" of migrations. While real world migrations are far more
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complex than what can be automatically determined, Alembic can still
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eliminate the initial grunt work in generating new migration directives
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from an altered schema. The ``--autogenerate`` feature will inspect the
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current status of a database using SQLAlchemy's schema inspection
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capabilities, compare it to the current state of the database model as
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specified in Python, and generate a series of "candidate" migrations,
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rendering them into a new migration script as Python directives. The
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developer then edits the new file, adding additional directives and data
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migrations as needed, to produce a finished migration. Table and column
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level changes can be detected, with constraints and indexes to follow as
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well.
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* Full support for migrations generated as SQL scripts. Those of us who
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work in corporate environments know that direct access to DDL commands on a
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production database is a rare privilege, and DBAs want textual SQL scripts.
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Alembic's usage model and commands are oriented towards being able to run a
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series of migrations into a textual output file as easily as it runs them
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directly to a database. Care must be taken in this mode to not invoke other
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operations that rely upon in-memory SELECTs of rows - Alembic tries to
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provide helper constructs like bulk_insert() to help with data-oriented
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operations that are compatible with script-based DDL.
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* Non-linear versioning. Scripts are given UUID identifiers similarly
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to a DVCS, and the linkage of one script to the next is achieved via markers
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within the scripts themselves. Through this open-ended mechanism, branches
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containing other migration scripts can be merged - the linkages can be
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manually edited within the script files to create the new sequence.
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* Provide a library of ALTER constructs that can be used by any SQLAlchemy
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application. The DDL constructs build upon SQLAlchemy's own DDLElement base
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and can be used standalone by any application or script.
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* Don't break our necks over SQLite's inability to ALTER things. SQLite
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has almost no support for table or column alteration, and this is likely
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intentional. Alembic's design
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is kept simple by not contorting its core API around these limitations,
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understanding that SQLite is simply not intended to support schema
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changes. While Alembic's architecture can support SQLite's workarounds, and
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we will support these features provided someone takes the initiative
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to implement and test, until the SQLite developers decide
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to provide a fully working version of ALTER, it's still vastly preferable
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to use Alembic, or any migrations tool, with databases that
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are designed to work under the assumption of in-place schema migrations
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taking place.
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Documentation and status of Alembic is at http://readthedocs.org/docs/alembic/.
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Keywords: SQLAlchemy migrations
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Platform: UNKNOWN
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Classifier: Development Status :: 4 - Beta
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Classifier: Environment :: Console
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Classifier: Intended Audience :: Developers
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Classifier: Programming Language :: Python
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Classifier: Programming Language :: Python :: 3
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Classifier: Programming Language :: Python :: Implementation :: CPython
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Classifier: Programming Language :: Python :: Implementation :: PyPy
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Classifier: Topic :: Database :: Front-Ends
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CHANGES
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LICENSE
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MANIFEST.in
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README.rst
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README.unittests
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setup.cfg
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setup.py
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test.cfg
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alembic/__init__.py
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alembic/command.py
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alembic/compat.py
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alembic/config.py
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alembic/context.py
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alembic/environment.py
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alembic/migration.py
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alembic/op.py
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alembic/operations.py
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alembic/script.py
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alembic/util.py
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alembic.egg-info/PKG-INFO
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alembic.egg-info/SOURCES.txt
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alembic.egg-info/dependency_links.txt
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alembic.egg-info/entry_points.txt
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alembic.egg-info/not-zip-safe
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alembic.egg-info/requires.txt
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alembic.egg-info/top_level.txt
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alembic/autogenerate/__init__.py
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alembic/autogenerate/api.py
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alembic/autogenerate/compare.py
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alembic/autogenerate/render.py
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alembic/ddl/__init__.py
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alembic/ddl/base.py
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alembic/ddl/impl.py
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alembic/ddl/mssql.py
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alembic/ddl/mysql.py
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alembic/ddl/oracle.py
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alembic/ddl/postgresql.py
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alembic/ddl/sqlite.py
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alembic/templates/generic/README
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alembic/templates/generic/alembic.ini.mako
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alembic/templates/generic/env.py
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alembic/templates/generic/script.py.mako
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alembic/templates/multidb/README
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alembic/templates/multidb/alembic.ini.mako
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alembic/templates/multidb/env.py
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alembic/templates/multidb/script.py.mako
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alembic/templates/pylons/README
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alembic/templates/pylons/alembic.ini.mako
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alembic/templates/pylons/env.py
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alembic/templates/pylons/script.py.mako
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docs/api.html
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docs/changelog.html
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docs/cookbook.html
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docs/front.html
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docs/genindex.html
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docs/index.html
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docs/ops.html
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docs/py-modindex.html
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docs/search.html
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docs/searchindex.js
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docs/tutorial.html
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docs/_images/api_overview.png
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docs/_sources/api.txt
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docs/_sources/changelog.txt
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docs/_sources/cookbook.txt
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docs/_sources/front.txt
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docs/_sources/index.txt
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docs/_sources/ops.txt
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docs/_sources/tutorial.txt
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docs/_static/basic.css
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docs/_static/changelog.css
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docs/_static/comment-bright.png
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docs/_static/comment-close.png
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docs/_static/comment.png
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docs/_static/doctools.js
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docs/_static/down-pressed.png
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docs/_static/down.png
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docs/_static/file.png
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docs/_static/jquery.js
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docs/_static/minus.png
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docs/_static/nature.css
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docs/_static/nature_override.css
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docs/_static/plus.png
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docs/_static/pygments.css
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docs/_static/searchtools.js
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docs/_static/sphinx_paramlinks.css
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docs/_static/underscore.js
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docs/_static/up-pressed.png
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docs/_static/up.png
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docs/_static/websupport.js
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docs/build/Makefile
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docs/build/api.rst
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docs/build/api_overview.png
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docs/build/changelog.rst
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docs/build/conf.py
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docs/build/cookbook.rst
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docs/build/front.rst
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docs/build/index.rst
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docs/build/ops.rst
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docs/build/requirements.txt
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docs/build/tutorial.rst
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docs/build/_static/nature_override.css
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tests/__init__.py
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tests/test_autogen_indexes.py
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tests/test_autogen_render.py
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tests/test_autogenerate.py
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tests/test_bulk_insert.py
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tests/test_command.py
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tests/test_config.py
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tests/test_environment.py
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tests/test_mssql.py
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tests/test_mysql.py
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tests/test_offline_environment.py
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tests/test_op.py
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tests/test_op_naming_convention.py
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tests/test_oracle.py
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tests/test_postgresql.py
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tests/test_revision_create.py
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tests/test_revision_paths.py
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tests/test_sql_script.py
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tests/test_sqlite.py
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tests/test_version_table.py
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tests/test_versioning.py
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[console_scripts]
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alembic = alembic.config:main
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../alembic/compat.py
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../alembic/util.py
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../alembic/script.py
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../alembic/op.py
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../alembic/context.py
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../alembic/command.py
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../alembic/__init__.py
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../alembic/operations.py
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../alembic/config.py
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../alembic/migration.py
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../alembic/environment.py
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../alembic/ddl/impl.py
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../alembic/ddl/mysql.py
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../alembic/ddl/mssql.py
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../alembic/ddl/__init__.py
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../alembic/ddl/oracle.py
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../alembic/ddl/sqlite.py
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../alembic/ddl/base.py
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../alembic/ddl/postgresql.py
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../alembic/autogenerate/api.py
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../alembic/autogenerate/compare.py
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../alembic/autogenerate/render.py
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../alembic/autogenerate/__init__.py
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../alembic/templates/generic/README
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../alembic/templates/generic/alembic.ini.mako
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../alembic/templates/generic/env.py
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../alembic/templates/generic/script.py.mako
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../alembic/templates/multidb/README
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../alembic/templates/multidb/alembic.ini.mako
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../alembic/templates/multidb/env.py
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../alembic/templates/multidb/script.py.mako
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../alembic/templates/pylons/README
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../alembic/templates/pylons/alembic.ini.mako
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../alembic/templates/pylons/env.py
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../alembic/templates/pylons/script.py.mako
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../alembic/compat.pyc
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../alembic/util.pyc
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../alembic/script.pyc
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../alembic/op.pyc
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../alembic/context.pyc
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../alembic/command.pyc
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../alembic/__init__.pyc
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../alembic/operations.pyc
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../alembic/config.pyc
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../alembic/migration.pyc
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../alembic/environment.pyc
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../alembic/ddl/impl.pyc
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../alembic/ddl/mysql.pyc
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../alembic/ddl/mssql.pyc
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../alembic/ddl/__init__.pyc
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../alembic/ddl/oracle.pyc
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../alembic/ddl/sqlite.pyc
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../alembic/ddl/base.pyc
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../alembic/ddl/postgresql.pyc
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../alembic/autogenerate/api.pyc
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../alembic/autogenerate/compare.pyc
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../alembic/autogenerate/render.pyc
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../alembic/autogenerate/__init__.pyc
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../alembic/templates/generic/env.pyc
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../alembic/templates/multidb/env.pyc
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../alembic/templates/pylons/env.pyc
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./
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requires.txt
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SOURCES.txt
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entry_points.txt
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dependency_links.txt
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PKG-INFO
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not-zip-safe
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top_level.txt
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../../../../bin/alembic
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SQLAlchemy>=0.7.3
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Mako
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@ -0,0 +1 @@
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alembic
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