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Mike Bayer
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table of their own (i.e. use single table inheritance). The columns will be appended to the base table, but only mapped by the subclass. - For both joined and single inheriting subclasses, the subclass will only map those columns which are already mapped on the superclass and those explicit on the subclass. Other columns that are present on the `Table` will be excluded from the mapping by default, which can be disabled by passing a blank `exclude_properties` collection to the `__mapper_args__`. This is so that single-inheriting classes which define their own columns are the only classes to map those columns. The effect is actually a more organized mapping than you'd normally get with explicit `mapper()` calls unless you set up the `exclude_properties` arguments explicitly. - docs/tests
SQLAlchemy
++++++++++
The Python SQL Toolkit and Object Relational Mapper
Requirements
------------
SQLAlchemy requires Python 2.4 or higher. One or more DB-API implementations
are also required for database access. See docs/intro.html for more
information on supported DB-API implementations.
Installing
----------
To install::
python setup.py install
To use without installation, include the ``lib`` directory in your Python
path.
Package Contents
----------------
doc/
HTML documentation, including tutorials and API reference.
examples/
Fully commented and executable implementations for a variety of tasks.
lib/
SQLAlchemy.
test/
Unit tests for SQLAlchemy. See ``README.unittests`` for more
information.
Help
----
Mailing lists, wiki, and more are available on-line at
http://www.sqlalchemy.org.
License
-------
SQLAlchemy is distributed under the `MIT license
<http://www.opensource.org/licenses/mit-license.php>`_.