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Python Programming Language scripts

Implementation of sets using sorted lists

This script implements set operations using sorted lists as the underlying data structure. Advantages: - Space savings -- lists are much more compact than a dictionary based implementation. - Flexibility -- elements do not need to be hashable, only __cmp__ is required. - Fast operations depending on the ...
Python

High performance currying with instance method

... the resulting callable: it avoids nesting an extra Python function call, which may be important.  ...
Python

Convex hull and diameter of 2d point sets

This script returns the convex hull (separated into upper and lower chains of vertices) and the diameter (farthest pair of points), given input consisting of a list of 2d points represented as pairs (x,y). The convex hull algorithm is Graham's scan, using a coordinate-based sorted order rather than the more commonly ...
Python

Infix Postfix

This script is useful to convert an infix expression to postfix and vice-versa. You can also evaluate infix and postfix expressions. ...
Python

Memoize Decorator with Timeout

This simple decorator is different to other memoize decorators in that it will only cache results for a period of time. It also provides a simple method of cleaning the cache of old entries via the .collect method. This will help prevent excessive or needless memory consumption. ...
Python

Storage for store information about prefixes

Storage for store information about prefixes script allows you to store information about domains determined by key prefixes. ...
Python

Summary reports using itertools groupby

This script produces a summary of the data, grouped by the given key (default: the first item), and giving totals of the given value (default: the second item). The key and value arguments should be functions which, given a data record, return the relevant value. ...
Python

Two pass Pairing Heap with Auxiliary List

This script allows you to manage data collections.For random data, this implementation still makes more comparisons than a sort using heapq or the builtin sort. For partially ordered data, it can perform better than the builtin sort. Because of the list of lists data structure, it always takes more memory than ...
Python

Type checked argument lists with decorators

... shows you to use the new decorator feature of python 2.4 to systematically check the argument types for type-sensitive functions. ...
Python

Criteria based cascading priority queue

This module provides a simple criteria-based priority queue with "priority cascading".The criteria argument should be a sequence of callables that return boolean values. There is no need to add an "all pass" criterion at the end; the queue will add all non-matching items with the least priority.ill add >a ...
Python

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