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        "author": "Simplon B.V. - Wichert Akkerman",
        "author_email": "wichert@wiggy.net",
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            "Development Status :: 5 - Production/Stable",
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            "License :: OSI Approved :: BSD License",
            "Programming Language :: Python :: 2",
            "Programming Language :: Python :: 2.6",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3",
            "Programming Language :: Python :: 3.3",
            "Programming Language :: Python :: 3.4",
            "Topic :: Software Development :: Libraries :: Python Modules"
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        "description": "Introduction\n============\n\nThis package implements a very minimal upgrade framework for use in Python\napplications. Its design consists of three parts:\n\n\n1. *context providers*, which are responsible for setting up the context\n   required for an upgrade step. For example establishing a connection to\n   a SQL server or configuring SQLALchemy.\n2. *upgrade steps*, which are functions that perform the actual upgrade\n   steps.\n3. a *commandline tool* to run the *upgrade steps* and required *context\n   providers*.\n\nIn order to keep the framework minimal there are a few things which are\ndeliberately not supported:\n\n* No versioning of the environment is done; the tool will always run all\n  all upgrade steps. Each step must support being run multiple times\n  without unexpected results.\n* Downgrades are not supported.\n* Depdendencies between upgrade steps are not supported.\n\nHere is a basic context provider which configures SQLAlchemy::\n\n   @upgrade_context('sql')\n   def setup_sqlalchemy(options):\n       engine = create_engine('postgresql:///projectA')\n       return {'sql-engine': engine}\n\nHere is an example upgrade step to add missing tables and indices in a project\nusing SQLALchemy::\n\n   @upgrade_step(require=['sql'])\n   def add_missing_tables(environment):\n       meta.metadata.create_all(environment['sql-engline'])\n\nAnd this is how you run the upgrade::\n\n   $ bin/upgrade --scan my.package",
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