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Visual Programming scripts

Python symbols

Python symbols is a toy module that shows a way to define symbols inside functions, using a decorator. ...
Python

Composite design pattern using dictionaries

The script illustrates the composite design pattern by using hierarchical dictionaries. It can be used to process hierarchical, tree-based data structures using Python dictionaries. ...
Python

Tail Call Optimization Decorator

This function decorates a function with tail call optimization. It does this by throwing an exception if it is it's own grandparent, and catching such exceptions to fake the tail call optimization. This function fails if the decorated function recurses in a non-tail contexif the de >/ ...
Python

First Class Enums in Python

This script allows you to do true immutable symbolic enumeration with qualified value access. Most propoqualifiedor an enum in python attempt to solve the issue with a single class. However, fact is that enum has a dual nature: It declares a new anonimous type *and* all possible instances (values) of that ...
Python

Treat the Win32 Registry like a Python dict

This class wraps most of the win32api functions for accessing a registry. It will read and write all win32 registry types, and will de/serialize python objects to registry keys when a string or integer representation is not possible. ...
Python

SQL like ORDER BY function for lists

This script contains a function that allows you to easily sort a list by multiple columns in ascending and descending order similar in function to the ORDER BY clause in SQL. ...
Python

An interval mapping data structure

This structure is a kind of dictionary which allows you to map data intervals to values. You can then query the structure for a given point, and it returns the value associated to the interval which contains the point.Boundary values don't need to be an integer ; in the test unit ...
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

Binary floating point summation

This script eliminates completely  rounding errors and loss of significance due to catastrophic cancellation during summation. It  achieves exactness by keeping full precision intermediate subtotals. Offers three alternative approaches, each using a different technique to store exact subtotals. ach >using/ ...
Python

Using eval To Transform Symbolic Expressions

Using eval() To Transform Symbolic Expressions script allows you to convert simple arithmetic expressions from infix to to converorm. ...
Python

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