python-lazy-object-proxy
Subpackage Descriptions
| single |
========
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
You can also install the in-development version with::
pip install
https://github.com/ionelmc/python-lazy-object-proxy/archive/master.zip
Documentation
=============
https://python-lazy-object-proxy.readthedocs.io/
Development
===========
To run all the 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
=========
1.11.0 (2025-04-16)
-------------------
* Added Python 3.13 wheels.
* Added support for __format__.
* Dropped support for Python 3.8.
1.10.0 (2023-12-15)
-------------------
* Added Python 3.12 wheels.
* Dropped support for Python 3.7.
* Applied some reformatting and lint fixes using ruff to the codebase
(mostly more Python 2 leftover cleanups).
1.9.0 (2023-01-04)
------------------
* Added support for matrix multiplication operator (``@``).
* Should have all the wheels now (including the manylinux ones).
* Bumped minimum version requirements for setuptools and setuptools-scm.
* Switched the default pure python fallback implementation to the "simple"
one (when you from lazy_object_proxy import Proxy
and the C extension is not available).
Previously the "slots" implementation was used but as it turns out it is
slower on Python 3.
1.8.0 (2022-10-26)
|
Configuration Switches (platform-specific settings discarded)
PY312 ON Build using Python 3.12
PY313 OFF Build using Python 3.13
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