ExtensionClass

Metaclass for subclassable extension types

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Project description

ExtensionClass

This package provides a metaclass that allows classes implemented in extension modules to be subclassed in Python. Unless you need ExtensionClasses for legacy applications (e.g. Zope), you probably want to use Python’s new-style classes (available since Python 2.2).

ComputedAttribute

This package provides a way to attach attributes to an ExtensionClass or instance that are computed by calling a callable. This works very much like property known from new-style classes, except that a ComputedAttribute can also be attached to an instance and that it honours ExtensionClass semantics (which is useful for retaining Acquisition wrappers, for example).

MethodObject

This package lets you attach additional “methods” to ExtensionClasses. These “methods” are actually implemented by subclassing the MethodObject.Method class and implementing the __call__ method there. Instances of those classes will be bound to the instances they’re attached to and will receive that instance object as a first parameter (after self).

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6.2.1a2 pre-release yanked

Nov 28, 2025

Reason this release was yanked:

Testing only release

6.2.1a1 pre-release yanked

Nov 28, 2025

Reason this release was yanked:

Bad release description

This version

6.2

Nov 16, 2025

6.1

Oct 29, 2025

6.0

Sep 17, 2024

5.1

Oct 5, 2023

5.0

Jan 19, 2023

4.9

Nov 17, 2022

4.8

Nov 3, 2022

4.7

Sep 16, 2022

4.6

Jan 14, 2022

4.5.1

Jun 11, 2021

4.5.0

Oct 7, 2020

4.4

Oct 5, 2018

4.3.0

Feb 22, 2017

4.2.1

Feb 2, 2017

4.2.0

Jan 18, 2017

4.1.2

Apr 4, 2015

4.1.1

Mar 20, 2015

4.1

Dec 18, 2014

4.1b1 pre-release

Nov 12, 2014

4.1a1 pre-release

May 4, 2013

4.0

Feb 24, 2013

4.0a1 pre-release

Dec 13, 2011

2.13.2

Jun 16, 2010

2.13.1

Apr 30, 2010

2.13.0

Feb 22, 2010

2.12.0

Feb 14, 2010

2.11.3

Aug 2, 2009

2.11.2

Aug 2, 2009

2.11.1

Aug 5, 2008

2.11.0b1 pre-release

Jan 6, 2008

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ExtensionClass 6.2

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Algorithm	Hash digest
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