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