Top-rated recipes by Kevin L. Sitze

Trace decorator for debugging (Python)

2011-01-24T18:40:51-08:00

Python recipe 577551 by Kevin L. Sitze (classes, debug, debugging, decorators, functions, inspection, modules, trace). Revision 2.

This package provides a decorator for tracing function and method calls in your applications. The tracing capabilities are managed through the logging package, and several mechanisms are provided for controlling the destination of the trace output.

It also provides functionality for adding decorators to existing classes or modules.

Easy property creation and control (Python)

2010-12-01T17:22:49-08:00

Python recipe 577482 by Kevin L. Sitze (class, property, property_creation, tools, unittests).

The Property class provides basic functionality that allows class level control over how a particular attribute is managed. In its simplest form a Property attribute works exactly like a regular attribute on an instance while providing documentation details about the attribute accessible via the declaring class.

Binary search function. (Python)

2011-02-07T06:37:52-08:00

Python recipe 577565 by Kevin L. Sitze (binary, binary_search, bsearch, functional, lower_bound, optimal_solution, search, upper_bound). Revision 3.

For a number of years Python has provided developers with the special parameters 'cmp' and 'key' on list.sort and __builtin__.sorted. However Python does not provide a built-in mechanism for doing binary searches on such sorted lists. This recipe provides a simple function that allows you to perform binary searches on your sorted sequences.

Poor Man unit tests (Python)

2011-01-08T18:57:18-08:00

Python recipe 577538 by Kevin L. Sitze (assertions, testing, unittests).

When building unit tests for modules many times using PyUnit feels like overkill. This is a simple implementation for testing single file modules.

Better quote module for bash shells (Python)

2010-12-03T09:16:45-08:00

Python recipe 577483 by Kevin L. Sitze (bash, command, commandline, escape, logging, quote, script, shell).

This Python module quotes a Python string so that it will be treated as a single argument to commands ran via os.system() (assuming bash is the underlying shell). In other words, this module makes arbitrary strings "command line safe" (for bash command lines anyway, YMMV if you're using Windows or one of the (less fine) posix shells).

Named Sequences for environments containing large numbers of POD instances (Python)

2010-11-27T13:55:18-08:00

Python recipe 577473 by Kevin L. Sitze (decorator, memory, sequence, slot, unittests).

Generate classes with named data attributes that can be sequenced. Useful for POD classes for which many records will exist concurrently.

Compare the feature set to NamedTuples by Raymond Hettinger: http://code.activestate.com/recipes/500261-named-tuples/

Fast flatten() with depth control and oversight over which subtrees to expand (Python)

2010-11-26T11:10:01-08:00

Python recipe 577470 by Kevin L. Sitze (flatten, iterator, iterators, list, optimal_solution, python, sequence, tuple).

Extremely fast, non-recursive, depth limited flatten with powerful control over which subtrees are to be expanded. If this is what you need then look no further.

Parallelize your shell commands (Bash)

2010-04-02T00:14:38-07:00

Bash recipe 577171 by Kevin L. Sitze (fifo, multiprocessing, parallel). Revision 2.

This script is used to processes a batch job of commands in parallel. The script dispatches new commands up to a user specified limit, each generated from a template provided on the command line using arguments taken from STDIN. The basic combining semantics are similar to "xargs -1", though support for multiple arguments and parallel processing of commands are provided.