Source

sqlalchemy / setup.py

"""setup.py

Please see README for basic installation instructions.

"""

# If using distutils (not distribute/setuptools),
# set this flag to True to compile C extensions.
# Otherwise use --with-cextensions
BUILD_CEXTENSIONS = False

import os
import sys
import re

extra = {}
if sys.version_info >= (3, 0):
    # monkeypatch our preprocessor
    # onto the 2to3 tool.
    from sa2to3 import refactor_string
    from lib2to3.refactor import RefactoringTool
    RefactoringTool.refactor_string = refactor_string

    extra.update(
        use_2to3=True,
    )

try:
    from setuptools import setup, Extension, Feature
except ImportError:
    from distutils.core import setup, Extension
    Feature = None

if Feature:
    extra.update(
        features = {'cextensions' : Feature(
            "optional C speed-enhancements",
            standard = False,
            ext_modules = [
                Extension('sqlalchemy.cprocessors',
                       sources=['lib/sqlalchemy/cextension/processors.c']),
                Extension('sqlalchemy.cresultproxy',
                       sources=['lib/sqlalchemy/cextension/resultproxy.c'])
            ],
        )}
    )
elif BUILD_CEXTENSIONS:
    extra.update(
        ext_modules = [
                Extension('sqlalchemy.cprocessors',
                      sources=['lib/sqlalchemy/cextension/processors.c']),
                Extension('sqlalchemy.cresultproxy',
                      sources=['lib/sqlalchemy/cextension/resultproxy.c'])
            ]
    )

def find_packages(dir_):
    packages = []
    for pkg in ['sqlalchemy', 'sqlalchemy_nose']:
        for _dir, subdirectories, files in os.walk(os.path.join(dir_, pkg)):
            if '__init__.py' in files:
                lib, fragment = _dir.split(os.sep, 1)
                packages.append(fragment.replace(os.sep, '.'))
    return packages

if sys.version_info < (2, 4):
    raise Exception("SQLAlchemy requires Python 2.4 or higher.")

v = open(os.path.join(os.path.dirname(__file__), 'lib', 'sqlalchemy',
         '__init__.py'))
VERSION = re.compile(r".*__version__ = '(.*?)'",
                     re.S).match(v.read()).group(1)
v.close()

setup(name = "SQLAlchemy",
      version = VERSION,
      description = "Database Abstraction Library",
      author = "Mike Bayer",
      author_email = "mike_mp@zzzcomputing.com",
      url = "http://www.sqlalchemy.org",
      packages = find_packages('lib'),
      package_dir = {'':'lib'},
      license = "MIT License",

      # TODO: this is nice, but Python 3 support ?
      # any way to make it not install for build/install ?
      #setup_requires=["setuptools_hg"],

      tests_require = ['nose >= 0.11'],
      test_suite = "nose.collector",
      entry_points = {
          'nose.plugins.0.10': [
              'sqlalchemy = sqlalchemy_nose.noseplugin:NoseSQLAlchemy',
              ]
          },

      long_description = """\
SQLAlchemy is:

    * The Python SQL toolkit and Object Relational Mapper
      that gives application developers the full power and
      flexibility of SQL. SQLAlchemy provides a full suite
      of well known enterprise-level persistence patterns,
      designed for efficient and high-performing database
      access, adapted into a simple and Pythonic domain
      language.
    * extremely easy to use for all the basic tasks, such
      as: accessing pooled connections, constructing SQL
      from Python expressions, finding object instances, and
      commiting object modifications back to the database.
    * powerful enough for complicated tasks, such as: eager
      load a graph of objects and their dependencies via
      joins; map recursive adjacency structures
      automatically; map objects to not just tables but to
      any arbitrary join or select statement; combine
      multiple tables together to load whole sets of
      otherwise unrelated objects from a single result set;
      commit entire graphs of object changes in one step.
    * built to conform to what DBAs demand, including the
      ability to swap out generated SQL with hand-optimized
      statements, full usage of bind parameters for all
      literal values, fully transactionalized and consistent
      updates using Unit of Work.
    * modular. Different parts of SQLAlchemy can be used
      independently of the rest, including the connection
      pool, SQL construction, and ORM. SQLAlchemy is
      constructed in an open style that allows plenty of
      customization, with an architecture that supports
      custom datatypes, custom SQL extensions, and ORM
      plugins which can augment or extend mapping
      functionality.

SQLAlchemy's Philosophy:

    * SQL databases behave less and less like object
      collections the more size and performance start to
      matter; object collections behave less and less like
      tables and rows the more abstraction starts to matter.
      SQLAlchemy aims to accomodate both of these
      principles.
    * Your classes aren't tables, and your objects aren't
      rows. Databases aren't just collections of tables;
      they're relational algebra engines. You don't have to
      select from just tables, you can select from joins,
      subqueries, and unions. Database and domain concepts
      should be visibly decoupled from the beginning,
      allowing both sides to develop to their full
      potential.
    * For example, table metadata (objects that describe
      tables) are declared distinctly from the classes
      theyre designed to store. That way database
      relationship concepts don't interfere with your object
      design concepts, and vice-versa; the transition from
      table-mapping to selectable-mapping is seamless; a
      class can be mapped against the database in more than
      one way. SQLAlchemy provides a powerful mapping layer
      that can work as automatically or as manually as you
      choose, determining relationships based on foreign
      keys or letting you define the join conditions
      explicitly, to bridge the gap between database and
      domain.

SQLAlchemy's Advantages:

    * The Unit Of Work system organizes pending CRUD
      operations into queues and commits them all in one
      batch. It then performs a topological "dependency
      sort" of all items to be committed and deleted and
      groups redundant statements together. This produces
      the maxiumum efficiency and transaction safety, and
      minimizes chances of deadlocks. Modeled after Fowler's
      "Unit of Work" pattern as well as Java Hibernate.
    * Function-based query construction allows boolean
      expressions, operators, functions, table aliases,
      selectable subqueries, create/update/insert/delete
      queries, correlated updates, correlated EXISTS
      clauses, UNION clauses, inner and outer joins, bind
      parameters, free mixing of literal text within
      expressions, as little or as much as desired.
      Query-compilation is vendor-specific; the same query
      object can be compiled into any number of resulting
      SQL strings depending on its compilation algorithm.
    * Database mapping and class design are totally
      separate. Persisted objects have no subclassing
      requirement (other than 'object') and are POPO's :
      plain old Python objects. They retain serializability
      (pickling) for usage in various caching systems and
      session objects. SQLAlchemy "decorates" classes with
      non-intrusive property accessors to automatically log
      object creates and modifications with the UnitOfWork
      engine, to lazyload related data, as well as to track
      attribute change histories.
    * Custom list classes can be used with eagerly or lazily
      loaded child object lists, allowing rich relationships
      to be created on the fly as SQLAlchemy appends child
      objects to an object attribute.
    * Composite (multiple-column) primary keys are
      supported, as are "association" objects that represent
      the middle of a "many-to-many" relationship.
    * Self-referential tables and mappers are supported.
      Adjacency list structures can be created, saved, and
      deleted with proper cascading, with no extra
      programming.
    * Data mapping can be used in a row-based manner. Any
      bizarre hyper-optimized query that you or your DBA can
      cook up, you can run in SQLAlchemy, and as long as it
      returns the expected columns within a rowset, you can
      get your objects from it. For a rowset that contains
      more than one kind of object per row, multiple mappers
      can be chained together to return multiple object
      instance lists from a single database round trip.
    * The type system allows pre- and post- processing of
      data, both at the bind parameter and the result set
      level. User-defined types can be freely mixed with
      built-in types. Generic types as well as SQL-specific
      types are available.

""",
      classifiers = [
        "Development Status :: 5 - Production/Stable",
        "Intended Audience :: Developers",
        "License :: OSI Approved :: MIT License",
        "Programming Language :: Python",
        "Programming Language :: Python :: 3",
        "Topic :: Database :: Front-Ends",
        "Operating System :: OS Independent",
        ],
        **extra
      )
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