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Metadata-Version: 2.1
Name: lazy-object-proxy
Version: 1.4.3
Summary: A fast and thorough lazy object proxy.
Home-page: https://github.com/ionelmc/python-lazy-object-proxy
Author: Ionel Cristian Mărieș
Author-email: contact@ionelmc.ro
License: BSD-2-Clause
Project-URL: Documentation, https://python-lazy-object-proxy.readthedocs.io/
Project-URL: Changelog, https://python-lazy-object-proxy.readthedocs.io/en/latest/changelog.html
Project-URL: Issue Tracker, https://github.com/ionelmc/python-lazy-object-proxy/issues
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: BSD License
Classifier: Operating System :: Unix
Classifier: Operating System :: POSIX
Classifier: Operating System :: Microsoft :: Windows
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Topic :: Utilities
Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*
========
Overview
========
A fast and thorough lazy object proxy.
* Free software: BSD 2-Clause License
Note that this is based on `wrapt`_'s ObjectProxy with one big change: it calls a function the first time the proxy object is
used, while `wrapt.ObjectProxy` just forwards the method calls to the target object.
In other words, you use `lazy-object-proxy` when you only have the object way later and you use `wrapt.ObjectProxy` when you
want to override few methods (by subclassing) and forward everything else to the target object.
Example::
import lazy_object_proxy
def expensive_func():
from time import sleep
print('starting calculation')
# just as example for a very slow computation
sleep(2)
print('finished calculation')
# return the result of the calculation
return 10
obj = lazy_object_proxy.Proxy(expensive_func)
# function is called only when object is actually used
print(obj) # now expensive_func is called
print(obj) # the result without calling the expensive_func
Installation
============
::
pip install lazy-object-proxy
Documentation
=============
https://python-lazy-object-proxy.readthedocs.io/
Development
===========
To run the all tests run::
tox
Acknowledgements
================
This project is based on some code from `wrapt`_ as you can see in the git history.
.. _wrapt: https://github.com/GrahamDumpleton/wrapt
Changelog
=========
1.4.3 (2019-10-26)
------------------
* Added binary wheels for Python 3.8.
* Fixed license metadata.
1.4.2 (2019-08-22)
------------------
* Included a ``pyproject.toml`` to allow users install the sdist with old python/setuptools, as the
setuptools-scm dep will be fetched by pip instead of setuptools.
Fixes `#30 <https://github.com/ionelmc/python-lazy-object-proxy/issues/30>`_.
1.4.1 (2019-05-10)
------------------
* Fixed wheels being built with ``-coverage`` cflags. No more issues about bogus ``cext.gcda`` files.
* Removed useless C file from wheels.
* Changed ``setup.py`` to use setuptools-scm.
1.4.0 (2019-05-05)
------------------
* Fixed ``__mod__`` for the slots backend. Contributed by Ran Benita in
`#28 <https://github.com/ionelmc/python-lazy-object-proxy/pull/28>`_.
* Dropped support for Python 2.6 and 3.3. Contributed by "hugovk" in
`#24 <https://github.com/ionelmc/python-lazy-object-proxy/pull/24>`_.
1.3.1 (2017-05-05)
------------------
* Fix broken release (``sdist`` had a broken ``MANIFEST.in``).
1.3.0 (2017-05-02)
------------------
* Speed up arithmetic operations involving ``cext.Proxy`` subclasses.
1.2.2 (2016-04-14)
------------------
* Added `manylinux <https://www.python.org/dev/peps/pep-0513/>`_ wheels.
* Minor cleanup in readme.
1.2.1 (2015-08-18)
------------------
* Fix a memory leak (the wrapped object would get bogus references). Contributed by Astrum Kuo in
`#10 <https://github.com/ionelmc/python-lazy-object-proxy/pull/10>`_.
1.2.0 (2015-07-06)
------------------
* Don't instantiate the object when __repr__ is called. This aids with debugging (allows one to see exactly in
what state the proxy is).
1.1.0 (2015-07-05)
------------------
* Added support for pickling. The pickled value is going to be the wrapped object *without* any Proxy container.
* Fixed a memory management issue in the C extension (reference cycles weren't garbage collected due to improper
handling in the C extension). Contributed by Alvin Chow in
`#8 <https://github.com/ionelmc/python-lazy-object-proxy/pull/8>`_.
1.0.2 (2015-04-11)
-----------------------------------------
* First release on PyPI.

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lazy_object_proxy