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160 lines
6.0 KiB
ReStructuredText
160 lines
6.0 KiB
ReStructuredText
Objects
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=======
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Dependency management tool for Python projects.
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+---------------------------------------+-------------------------------------------------------------------+
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| *PyPi* | .. image:: https://pypip.in/version/Objects/badge.svg |
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| | :target: https://pypi.python.org/pypi/Objects/ |
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| | :alt: Latest Version |
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| | .. image:: https://pypip.in/download/Objects/badge.svg |
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| | :target: https://pypi.python.org/pypi/Objects/ |
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| | :alt: Downloads |
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| | .. image:: https://pypip.in/license/Objects/badge.svg |
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| | :target: https://pypi.python.org/pypi/Objects/ |
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| | :alt: License |
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+---------------------------------------+-------------------------------------------------------------------+
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| *Python versions and implementations* | .. image:: https://pypip.in/py_versions/Objects/badge.svg |
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| | :target: https://pypi.python.org/pypi/Objects/ |
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| | :alt: Supported Python versions |
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| | .. image:: https://pypip.in/implementation/Objects/badge.svg |
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| | :target: https://pypi.python.org/pypi/Objects/ |
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| | :alt: Supported Python implementations |
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+---------------------------------------+-------------------------------------------------------------------+
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| *Builds and test coverage* | .. image:: https://travis-ci.org/rmk135/objects.svg?branch=master |
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| | :target: https://travis-ci.org/rmk135/objects |
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| | :alt: Build Status |
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| | .. image:: https://coveralls.io/repos/rmk135/objects/badge.svg |
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| | :target: https://coveralls.io/r/rmk135/objects |
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| | :alt: Coverage Status |
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+---------------------------------------+-------------------------------------------------------------------+
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Introduction
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------------
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Python ecosystem consists of a big amount of various classes, functions and
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objects that could be used for applications development. Each of them has its
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own role.
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Modern Python applications are mostly the composition of well-known open
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source systems, frameworks, libraries and some turnkey functionality.
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When application goes bigger, its amount of objects and their dependencies
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also increased extremely fast and became hard to maintain.
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**Objects** is designed to be developer's friendly tool for managing objects
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and their dependencies in formal, pretty way. Main idea of **Objects** is to
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keep dependencies under control.
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Installation
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------------
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**Objects** library is available on PyPi_::
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pip install objects
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Documentation
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-------------
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**Objects** documentation is hosted on ReadTheDocs:
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- `Stable version`_
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- `Latest version`_
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Examples
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--------
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.. code-block:: python
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"""Concept example of `Objects`."""
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from objects.catalog import AbstractCatalog
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from objects.providers import Singleton
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from objects.providers import NewInstance
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from objects.injections import KwArg
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from objects.injections import Attribute
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from objects.injections import inject
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import sqlite3
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class ObjectA(object):
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"""Example class ObjectA, that has dependency on database."""
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def __init__(self, db):
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"""Initializer."""
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self.db = db
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class ObjectB(object):
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"""Example class ObjectB, that has dependencies on ObjectA and database."""
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def __init__(self, a, db):
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"""Initializer."""
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self.a = a
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self.db = db
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class Catalog(AbstractCatalog):
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"""Catalog of objects providers."""
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database = Singleton(sqlite3.Connection,
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KwArg('database', ':memory:'),
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Attribute('row_factory', sqlite3.Row))
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""":type: (objects.Provider) -> sqlite3.Connection"""
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object_a = NewInstance(ObjectA,
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KwArg('db', database))
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""":type: (objects.Provider) -> ObjectA"""
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object_b = NewInstance(ObjectB,
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KwArg('a', object_a),
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KwArg('db', database))
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""":type: (objects.Provider) -> ObjectB"""
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# Catalog static provides.
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a1, a2 = Catalog.object_a(), Catalog.object_a()
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b1, b2 = Catalog.object_b(), Catalog.object_b()
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assert a1 is not a2
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assert b1 is not b2
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assert a1.db is a2.db is b1.db is b2.db is Catalog.database()
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# Example of inline injections.
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@inject(KwArg('a', Catalog.object_a))
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@inject(KwArg('b', Catalog.object_b))
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@inject(KwArg('database', Catalog.database))
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def example(a, b, database):
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assert a.db is b.db is database is Catalog.database()
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example()
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You can get more **Objects** examples in ``/examples`` directory on
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GitHub:
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https://github.com/rmk135/objects
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Feedback
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--------
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Feel free to post questions, bugs, feature requests, proposals etc. on
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**Objects** GitHub Issues:
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https://github.com/rmk135/objects/issues
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Your feedback is quite important!
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.. _PyPi: https://pypi.python.org/pypi/Objects
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.. _Stable version: http://objects.readthedocs.org/en/stable/
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.. _Latest version: http://objects.readthedocs.org/en/latest/
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