Popular recipes tagged "meta:loc=27"

Clear Only Project Modules (Python)

2014-12-17T19:03:15-08:00

Python recipe 578982 by Cornelius Jatniel Prinsloo (clear, modules, project, reload, script, startup).

Useful for python sessions that have a long startup time because of external dependancies [In my case that would be pygame and pymunk] I've got a slow computer so it takes a while to startup this is the solution I came up with

import this before any other of your project imports example: import reloading # The modules in your project folder get cleared then load the rest of your project modules

make sure that the reloading script is in your project folder, or else it won't work

You might be able to extend this by changing line

hex2dec (Bash)

2013-07-01T05:59:06-07:00

Bash recipe 578588 by greg zakharov (hex2dec).

Experimental

DEMO - Generate A Crude 1KHz Sinewave Using A BASH Script. (Bash)

2013-03-01T19:41:47-08:00

Bash recipe 578477 by Barry Walker (audio, bash, demo, generator, linux, shell, sinewave, sound).

A very simple crude sinewave generator using a BASH script inside a Linux Terminal.

The file required is generated inside the code and requires /dev/audio to work.

Ensure you have this device, if not the download oss-compat from your OS's repository...

It lasts for about 8 seconds before exiting and saves a 65536 byte file to your working directory/drawer/folder as sinewave.raw.

Use an oscilloscope to check the waveform generated...

It is entirely Public Domain and you may do with it as you please...

Enjoy finding simple solutions to often very difficult problems... ;o)

Bazza, G0LCU...

Bisection Method in Python (Python)

2013-01-16T16:37:33-08:00

Python recipe 578417 by Captain DeadBones (bisect, mathematics, python).

This is a quick way to do bisection method in python. I wrote his code as part of an article, How to solve equations using python

Storing a Single Username and Encrypted Password to a File (Python)

2013-01-31T02:07:25-08:00

Python recipe 578443 by Captain DeadBones (encryption, file, python).

This script was written for an article I wrote to check user passwords. It stores data using SHA one-way function. For more information Authentication Of Users And Passwords In Python

Code To Store Encrypted Password in a File (Python)

2013-01-19T04:07:50-08:00

Python recipe 578430 by Captain DeadBones (encryption, password, python).

This snippet of code was written as part of an article - Password Protecting You Python Application

Find the nth prime in python (Python)

2013-01-06T20:23:21-08:00

Python recipe 578403 by Captain DeadBones (primes, prime_generator, prime_number).

This is a nth prime number generator in python that I put together for an article I wrote How To Find Prime Numbers In Python

Finding the limits (C)

2012-03-16T10:46:32-07:00

C recipe 578077 by Boubakr .

a simple program to output the values corresponding to the symbols defined in the header files.

Fuzzy Logic Fractal (Python)

2011-08-14T23:09:08-07:00

Python recipe 577841 by FB36 (chaos, fractal, math, mathematics).

This fractal created by converting logic statements into equations using fuzzy logic operators:

X: X is as true as Y is true

Y: Y is as true as X is false

See: Scientific American Magazine, February 1993, "A Partly True Story"

Universal eval to string function (Python)

2011-02-24T10:17:32-08:00

Python recipe 577585 by Jakub Jankiewicz (evaluation, exec, python, python_scripts).

This is a function that evaluate all expressions and statements and return the result as a string. It also return Exceptions as strings. It is used in trypython.jcubic.pl

Remove ID3 tags from MP3 files (Python)

2010-03-29T10:55:27-07:00

Python recipe 577139 by ccpizza (id3, mp3, mutagen). Revision 3.

Remove ID3 tags from all files in the current directory

Eight Queens With out Permutations (Python)

2010-07-21T10:11:20-07:00

Python recipe 577325 by Narayana Chikkam (eight, queens).

Eight Queens is one of the popular algorithms in backtracking. The solution given below uses simple math to reduce the processing. The logic is keep placing the coins on the board with below rules:

Don't place the coin if there is another coin present in the same row
Don't place the coin if there is another coin present in the same col
Don't place the coin if there is another coin present in any of the diagonal lines.

Keep repeating the above 3 rules recursively until we keep all the coins. Problem Definition: http://en.wikipedia.org/wiki/Eight_queens_puzzle

Simple primes generator (Python)

2009-11-04T06:52:06-08:00

Python recipe 576948 by Maxime Fontenier (any, generator, numbers, primes).

Simple prime generator.

I write it as a sample usage of the any function.

Simple reverse converter of unicode code points string (Python)

2009-09-22T20:02:32-07:00

Python recipe 576909 by Ryan (code, points, prefix, reverse, str, string, u, unicode). Revision 4.

It's a simple recipe to convert a str type string with pure unicode code point (e.g string = "\u5982\u679c\u7231" ) to an unicode type string. Actually, this method has the same effect with 'u' prefix. But differently, it allows you to pass a variable of code points string as well as a constant one.

Packet monitoring with pcap and dpkt (Python)

2011-09-13T06:56:36-07:00

Python recipe 576678 by Victor Yang (network, sniff). Revision 3.

This recipe shows how to use pypcap and dpkt to monitor network traffic and grep with regular expression. Python 2.3 up required pypcap: http://code.google.com/p/pypcap/ dpkt: http://code.google.com/p/dpkt/

Subclass function (Python)

2009-03-23T00:48:54-07:00

Python recipe 576697 by Peter Russell (class, metaprogramming, subclass). Revision 4.

Do not use this function - instead use the built in type(name, bases, dict) constructor This is a function that builds a subclass of some base classes. I wrote it while unaware that type could be used as a constructor.

Romantic love poem in Python (Python)

2014-09-04T09:34:16-07:00

Python recipe 496781 by Damian Parniewicz (ui). Revision 3.

This recipe was written for my beautiful girl...however signification of this code is universal

@replier using tweet-sauce (Python)

2009-01-12T17:01:40-08:00

Python recipe 576610 by Zach Seifts (sauce, tweet_sauce, twitter).

Requires: tweet-sauce

Replies to anyone who @replies the logged user.

Efficient generation of permutations (Python)

2008-12-22T06:11:55-08:00

Python recipe 576593 by nnarula (algorithms, permutations).

This code builds an iterator on the fly that will successfully return unique permutations of n integers, m at a time (nPm). It does not use recursion, so stack size is not a problem. Sample usage it= build(n,p)
it.next() # returns permutation

it=build(n) is the same as build(n,n) do it will generate n! unique permuatations.

I worte it over the weekend and have tested it reasonably for n upto 30 and p from 1 to 30

Spherical Polar Coordinates (Python)

2008-08-26T08:49:39-07:00

Python recipe 576457 by alexander baker (mechanics, physics, polar, quantum).

Spherical Polar Coordinates http://www.alexfb.com/cgi-bin/twiki/view/PtPhysics/Spherical-Polar-Coordinates-Python