Popular recipes tagged "meta:loc=98"

Generator with lookahead (Python)

2013-09-24T10:44:56-07:00

Python recipe 578671 by Rutger Saalmink (background, generator, generators, lookahead, performance, python).

Python generators are a great way of reducing memory usage due to the lazy (on demand) generation of values. However, when the process-time of generating such a value is relatively high, we can improve performance even more by obtaining the next n values of the generator in a separate thread in the background. Hence, the BackgroundGenerator.

Win32 named mutex class for system-wide mutex (Python)

2011-07-15T21:12:40-07:00

Python recipe 577794 by Ben Hoyt (ctypes, lock, mutex, process, threading, win32, windows).

NamedMutex is a class for using Windows (Win32) named mutexes for system-wide locks. For example, we use these to lock system-wide log files that multiple processes can write to.

Simple LF Audio Oscilloscope Using Standard Python. (Python)

2011-04-07T17:17:57-07:00

Python recipe 577644 by Barry Walker (anim, audio, demo, display, linux, oscilloscope, scope, sound).

AudioScope.py

I think this might be a first for both Python.

Initially uploaded to LXF, now also here under the MIT licence.

I am building a kids level seismometer and wanted to use standard Python inside Linux.

This DEMO code was my starter idea and looks as though using standard ASCII only might just work a real treat.

I've issued it to LXF under the MIT licence for future reasons.

It doesn't look much on screen except that the waveform(s) shown is/are a basic visual, electrical representation of your voice. ;o)

It is possible to link the earphone socket on this notebook to the mic input and start the Audio Function Generator, elsewhere in this site, in a separate Python terminal and see those waveforms inside the AudioScope.py`s own Python terminal.

This grabs a 1 second 8KB burst, and then displays it onto the Python terminal. The timebase, amplitude, trigger, single shot and others are not included but the main grab and display using /dev/dsp is shown. This can be made platform independent by changing the /dev/dsp to something external like the Arduino Dev Board. This uses STANDARD Python 2.5.x and later and tested on PCLinuxOS 2009 and Debian 6.0.0.

Enjoy finding simple solutions to often very difficult problems.

Bazza, G0LCU.

qemu-nbd Python wrapper (Python)

2011-03-01T20:11:45-08:00

Python recipe 577593 by Slava Yanson (kvm, libvirt, python, qemu, virtualization).

A simple Python wrapper that makes it easier to mount virtual machine disk images to a local machine.

Requires qemu-nbd package installed.

Post code to Pastebin.com (JavaScript)

2010-12-06T17:56:41-08:00

JavaScript recipe 577489 by Nathan Rambeck (komodo, pastebin).

This is an updated version of another recipe (#577170) to post selected text to pastebin.com. This version uses the latest API. You'll want to change the following variables to your preferences: email, nick, expiry.

Bible Verse Quiz - verse.py (Python)

2010-02-12T04:19:44-08:00

Python recipe 577044 by Stephen Chappell (bible, quiz, verse, _versematch_). Revision 3.

Encapsulate verses from the Bible and support quizzing over them.

The Verse class in this module is far superior to the one implemented in Java. All quizzing/testing capabilities are imported from another module.

unix subprocess wrapper (Python)

2008-07-29T07:11:17-07:00

Python recipe 576387 by Pádraig Brady (group, popen, subprocess, unix). Revision 2.

I have used this for ages to control child processes (and all their children). Some of the existing subprocess module was based on this, but I find this simpler for my uses at least.

Example:

import subProcess
process = subProcess.subProcess("your shell command")
process.read() #timeout is optional
handle(process.outdata, process.errdata)
del(process)

Easy interact with Mac Os user, (Python)

2004-09-05T16:26:58-07:00

Python recipe 303529 by Matteo Rattotti .

EasyDialogs give you the chance to connect a light Gui to your script, so user can interact and pass parameters to the script without using terminal.

Returning results from the XML interface at searchhippo.com (Python)

2002-06-23T14:07:20-07:00

Python recipe 135130 by Bill Bell (web).

Semi-lazy interrogation of searchhippo.com returns a virtual array of the search engine's records.