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Programming scripts

Restrictive APIs for Python

Python has no inherent provision for a restrictive API that blocks accesses to methods and variables outside an allowed set. Inexperienced Python programmers may fail to adhere to an agreed-upon API, directly accessing the private internals of a class. Adherence to defined APIs is a good thing. This script contains a  ...
Python

How to disable debug logging in release version

When you release your program to client, its a good idea to disable all the debug messages. It is possible via custom configuring debug levels at all modules, but may be implemented using a simple wrapper around logging.getnted usinfunction. ...
Python

Extract a inner function from a class

This function can extract a inner function from a class or a function. It may be useful when writing a unit test code. ...
Python

Extending the logging module

This script helps you in adding new format specifiers to the logging module. In this example, it's for the user name and the name of the function that logged the message. ...
Python

Debuging of object instantiation

If you are debugging a program, this script will help you to know if some special objects exist and where they came from. ...
Python

Debug runtime objects using gc get objects

Since Python 2.2 there is a handy function in the Garbage Collection Module called get_objects(). It gives back a list of all objects that are under control of the Garbeage Collector. This script implements a way you can extract informations of your application in runtime.The example dumps a list of all ...
Python

Changing a closed over value in a cell

In most languages with closures, it is possible to change a closed-over value and have the change visible in other closures which share a reference to the same variable. Python's syntax makes this impossible. Putting your changeable values inside a mutable object like a list-- it may occasionally happen that you ...
Python

Dictionary Mixin Framework

This script makes it easy to provide a full dictionary interface to a class defining only a few mapping methods for getting, setting, deleting, and listing keys. Also, a function is provided to incorporate the mixin at runtime so that code for existing modules need not be modified.By usmodules nixin as a superclass, ...
Python

Lazy attributes

Lazy attributes script shows how to create attributes with 'computed at first use' values. ...
Python

Classmethod emulation in python2 1

Class methods were introduced in python2.2. This script illustrates how the same effect can be achieved in python 2.1. ...
Python

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