Recipes from the Python Cookbook

Python
recipe 576567
by Tal Einat
(concurrency, contextmanager, lock, locking, memcache, memcached, queue).
A simple lock-queue (FIFO) context manager implemented with Memcached.
In essence this i...

Python
recipe 576564
by denis
(python, random number, Walker's alias).
an example, strings A B C or D with probabilities .1 .2 .3 .4 --
abcd = dict( A=1, D=4, C=3, B=2 )
# keys can be any immutab...

Python
recipe 576563
by Ken Seehart
(cache, property).
A cached property is a read-only property that is calculated on demand and automatically cached. If the value has already been calculated, th...

Python
recipe 576562
by George Sakkis
(design pattern, dummy, Null).
This recipe builds on two previously posted recipes for a null or dummy object by modifying a few methods (e.g. as in SQL, Null...

Python
recipe 576561
by Dario Lopez-Kästen
(checker, generator, pasword, policy).
Revision 2.
Yet another password generator module. This module contains utility functions for both generating and ...

Python
recipe 576560
by Timothy Makobu
(DNS, ISP, reverse DNS, reverse DNS zone file, zone file).
Generates reverse DNS zone files for a given subnet.

Python
recipe 576557
by Michal Niklas
(database, postgres, PostgreSQL, schema).
Revision 2.
With PostgreSQL there is:
pg_dump --schema_only
but I wanted to compare my PostgreSQL and Oracle databas...

Python
recipe 576556
by kaushik.ghose
(matplotlib, random number).
This is a class that allows you to set up an arbitrary probability distribution function and generate random numbers that follow ...

Python
recipe 576555
by George Sakkis
(datastructures, namedtuple, record).
This is a recipe similar in functionality and exec-style optimized implementation to the very well received namedtuple (...

Python
recipe 576554
by Victor Lin
(color, color space, convert, graph).
Functions for converting bwtween RGB and HSV color space.