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Object Relation Mapping scripts

Just in time instantiation

... a class for Just In Time instantiation of objects. Init is called only when the first attribute ... automatic delegation is used to front for the object. ...
Python

Create objects from variable class names

Sometimes you would want to create objects from various classes based on some condition (without using eval()). For example when parsing X(HT)ML files you want to handle some tags using specific classes. This script is an example in this sense. ...
Python

Observer Pattern

... pattern. It defines a one-to many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically. ...
Python

Stateful Objects use Mix ins to define behaviour

If you want to implement stateful objects, which have a different set of behaviours according ... a class which is dynamically inherited by an object. The methods of the mix-in class are thus accessible through the object. This is a clean way of providing objects with standard interfaces. ...
Python

Caching object creation

... to memoize functions. Using this script you can cache object creation, i.e. __new__ and __init__ methods are called only when n.e. __newt;br >/ ...
Python

Extending Classes

This script contains two implementations for extending an exsisting class using metaclasses. ...
Python

z sync

This script gives access to the Sync class. Objects created by the Sync class are meant to be used when trying to syncronize the execution of two or more threads. ...
Python

Rich Comparison Mixin

This script implements the full suite of rich comparison operators if __cmp__ is defined.The __cmp__ method is sufficient to provide comparisons between user-defined classes. However, inheriting from a base class (such as a builtin) which already provides the rich-comparison methods will cause the derrived __cmp__ not to be used. cause >the/ ...
Python

Right method names suggestion

This script uses __getattr__ to modify the error messages given when a wrong class method is called. It shows the first five ranked most similar method names, followed by the first line of their docstrings (this is useful to see their parameters, if you use this convention in your sources), and ...
Python

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