Discreet Blogmarks

Benchmarking twisted

Mon, 01 Mar 2010 23:47:12 GMT

I recently did some benchmarking of twisted on top of PyPy. For the very impatient: PyPy is up to 285% faster than CPython. For more patient people, there is a full explanation of what I did and how I performed measurments, so they can judge themselves

obfuscate

Thu, 11 Feb 2010 15:38:40 GMT

Obfuscate and unobfuscate text using classical encryption algorithms. Includes Caesar cipher, rot13, rot5, rot18, rot47, atbash, Playfair, Playfair6 and Playfair16,Railfence (encryption only), Keyword, Affine, Vigenere,frob (xor) and others.

Grok book published

Thu, 11 Feb 2010 15:32:16 GMT

The book is the result of a year’s work and is intended for developers more or less familiar with the concepts of web applications who want to write their applications using the Python programming language. No familiarity with Zope is assumed from the start.

BlueBream v1.0 documentation

Sat, 06 Feb 2010 13:58:24 GMT

BlueBream is a web framework written in the Python programming language. BlueBream is free/open source software, owned by the Zope Foundation, licensed under the Zope Public License (bsd like, gpl compatible license). BlueBream was previously known as Zope 3.

Twisted on IronPython

Sat, 30 Jan 2010 10:57:04 GMT

With this in place Seo Sanghyeon, maintainer of FePy the community distribution of IronPython, has been looking at getting Twisted working with IronPython. Twisted is an open source event-driven networking engine written in Python.

The Python GIL Visualized

Sat, 30 Jan 2010 10:48:32 GMT

In preparation for my upcoming PyCON'2010 talk on "Understanding the Python GIL", I've been working on a variety of new material--including some graphical visualization of the GIL behavior described in my earlier talk. I'm still experimenting, but check it out.

音楽産業とマスメディアの次にインターネットが破壊するのは金融業界だ–ついに

Sat, 30 Jan 2010 10:46:24 GMT

インターネットのいちばんすごいところは、いろんな業界を破壊したことだ。ファイル共有(Napsterなど)とiTunesは音楽産業の姿を完全に変えてしまった。ブログなどオンラインのコンテンツは古いメディアを殺した。そしてオープンソースとsoftware-as-a-service(SaaS) は、高価な、社内据え付け型の、企業用ソフトウェア製品をたたきのめした。

Adobe AIR 2 example: UDP sockets with PyAMF and Twisted � PyAMF blog

Sat, 30 Jan 2010 10:44:16 GMT

We created an example, using Adobe AIR 2.0 and the PyAMF and Twisted libraries for Python, that echoes ByteArray messages every x seconds to a Twisted UDP server. The example application also enumerates available hardware and software network interfaces on the client computer using the new NetworkInfo API.

Rsync Algorithm In Python

Tue, 26 Jan 2010 13:45:36 GMT

An implementation of the rsync algorithm (http://samba.anu.edu.au/rsync/tech_report/node3.html) in Python. As my rolling checksum, I just summed all of the ascii byte values in a given window. Will document when it's not 1 am.

素数判定

Sun, 14 Dec 2008 16:40:32 GMT

ところで、上の擬素数のコードをCで書いたら、非常に遅くてびっくりしました。... どうやら%=の処理が遅すぎる。というか多すぎる。pythonの組み込みのpowは便利で3項目のパラメタでmodの計算をしてくれているのです。じゃpythonはどうやってるのかとソースを見てみましたが、難しそうなことをやってます。

Tahoe backend for duplicity

Sat, 29 Nov 2008 08:10:40 GMT

This feature brings a fully distributed and fault-tolerant backend store to duplicity. Usage of GPG encryption is not necessary with this backend because everything is already encrypted by tahoe. The patch is quite small (<100 lines) and makes heavy use of tahoe CLI. It has the advantage of being largely independent from tahoe codebase.

INET6: Jythonroid: Jython runs successfully on Android Emulator

Wed, 19 Nov 2008 12:52:16 GMT

Jythonroid is a project for porting jython on Android platform. Created by ClassFoo.

Apache CouchDB で MapReduce フレームワークに基づく問いあわせを行う

Sat, 15 Nov 2008 03:50:24 GMT

本連載では今Web開発者が注目するApache CouchDB[1]に関する技術情報を紹介します。今回は5回シリーズの第3回として、CouchDB のビュー/クエリ機能であるMapReduceフレームワークの利用方法を学びます。

Mozilla meets Python without rebulding

Sun, 15 Jun 2008 03:18:24 GMT

MozillaとPythonをつなぐPyXPCOMが標準では含まれておらずリビルドが必要で，しかもコンパイラが限定されているというので一旦はあきらめたが，Miroからバイナリファイルをもらってリビルド無しで何とか環境ができたという話．

Yes, Barry, there is a PythonLabs

Sun, 15 Jun 2008 03:14:08 GMT

Barry, your little friends are wrong. They have been affected by the skepticism of a skeptical age. They do not believe except what they see. They think that nothing can be which is not comprehensible by their little minds. All minds, Barry, whether they be men's or children's, are little. In this great universe of ours, man is a mere insect, an ant, in his intellect as compared with the boundless world about him, as measured by the intelligence capable of grasping the whole of truth and knowledge.

avbin

Sun, 15 Jun 2008 03:07:44 GMT

AVbin is a thin wrapper around FFmpeg, providing binary compatibility for applications and languages that need it.

Python Types and Objects

Sun, 15 Jun 2008 03:03:28 GMT

Explains different Python new-style objects, starting with and , and going all the way to user defined classes and instances. New-style implies Python version 2.2 and up. The system described is sometimes called the Python type system, or the object model.

VideoCapture

Sun, 15 Jun 2008 03:03:28 GMT

VideoCapture is a Python extension for Win32 which makes it possible to access video-capture devices (e.g. a USB webcam). It consists of a low-level native module (vidcap.pyd) and a high-level module written in Python (VideoCapture.py) which should be used solely.

Manage Ogg audio streams with OGMtools

Sun, 15 Jun 2008 03:01:20 GMT

When I make videos, I almost always use Ogg to encode the audio. Storing the audio in Ogg saves space on my machine without sacrificing quality. However, I invariably need to loop, concatenate, or change the audio in some way, which can be difficult. For many of these tasks I turn to the OGMtools suite to make the process easier.

A Place for Everyone

Sun, 15 Jun 2008 02:59:12 GMT

Over the years, many have complained that the Twisted core developers are elitist perfectionists who make it impossible for anyone to contribute code. Most of us would object to such a sweeping statement, but we can't deny that there is at least a little truth in that complaint. The ultimate motivation for our standards and adherence to them is quality. We want Twisted to be as stable, useful, and maintainable as possible. However, quality always comes with a cost, and we're tired of paying it.

スタックレスってどういうこと？

Sun, 15 Jun 2008 02:52:48 GMT

eguoさんの日記（無断でアンテナ捕捉させて頂いてます m(_ _;m )でstackless pythonに触れているのを見て、そういえばスタックレスって何だっけな、と思って再度調査。まとめることにしました。

Enamel

Sun, 15 Jun 2008 02:44:16 GMT

Enamel is a Python web framework which provides an abstraction layer over Twisted, Nevow, Formal and SQLAlchemy to converge their concepts under a single framework.

OpenTK

Sat, 10 May 2008 10:16:32 GMT

The Open Toolkit is a game development library for .Net/Mono with an elegant, yet powerful, API. It enables you to bring your ideas to fruition, leveraging the full power of .Net, OpenGL and OpenAL. OpenTK needs no setup. It runs on Linux and Windows and works with all .Net languages, like C#, VB.Net and IronPython. Best of all, it is - and will remain! - free for both commercial and non-commercial projects.

rietveld - Code Review for Subversion, hosted on Google App Engine

Sat, 10 May 2008 10:12:16 GMT

This project shows how to create a somewhat substantial web application using Django on Google App Engine. In addition, I hope it will serve as a practical tool for the Python developer community, and hopefully for other open source communities. As I've learned over the last two years at Google, where I developed a similar tool named Mondrian, proper code review habits can really improve the quality of a code base, and good tools for code review will improve developers' life. Some code in this project was derived from Mondrian, but this is not the full Mondrian tool.

Adobe、「Open Screen Project」でFlashをオープンに

Tue, 06 May 2008 15:57:52 GMT

同プロジェクトではFlash技術のオープン化を進めるため、SWFおよびFLV/F4V仕様の使用制限を撤廃し、Adobe Flash Playerのデバイス移植レイヤーAPI、 Adobe Flash Castプロトコル、AMFプロトコルを公開する。またライセンス料を廃し、デバイス向けFlash PlayerとAdobe AIRの次期メジャーリリースを無料にする。

電子念佛機

Tue, 06 May 2008 15:51:28 GMT

作品の元をたどると——中国には電子念佛機という、さまざまな念仏が聞ける一般プレーヤーが売られており、再生すれば仏に“会える”。念佛機に着想を得たfm3は、念仏ではなくアンビエントミュージックを楽しめる「ブッダマシーン」を作り出したというわけだ。

Concurrency with Python, Twisted, and Flex

Tue, 06 May 2008 15:51:28 GMT

An example of parallel programming using all the CPUs on your computer or cluster. Also shows how to add a Flex user interface.

Validation with lxml

Tue, 29 Apr 2008 10:31:28 GMT

Apart from the built-in DTD support in parsers, lxml currently supports three schema languages: DTD, Relax NG and XML Schema. All three provide identical APIs in lxml, represented by validator classes with the obvious names.

Generator Tricks for Systems Programmers

Tue, 29 Apr 2008 10:31:28 GMT

This tutorial discusses various techniques for using generator functions and generator expressions in the context of systems programming. This topic loosely includes files, file systems, text parsing, network programming, and programming with threads.

HTML2PDF converter written in Python. About

Sun, 20 Apr 2008 16:40:32 GMT

Uses the html5lib standard conform parsing the documents. Uses the html5lib standard conform parsing the documents.

Porting Zope to different Pythons

Mon, 14 Apr 2008 16:38:24 GMT

The Jython project is hoping to start a Google Summer of Code project this year to port more Zope 3 packages, such as zope.component to Jython. The Zope Foundation is very grateful to the Jython project for taking this initiative; I believe it's of great importance to Zope as a whole. So, we hope that project gets accepted. The Zope Foundation going to make sure the project is well-supported by the Zope community.

tahoe tiddly wiki

Sun, 06 Apr 2008 11:52:32 GMT

Here is a version of Tiddly Wiki which has been slightly patched to save itself with an HTTP PUT back to its web location instead of writing itself to a local file.

Web Automation with Python for .NET

Sun, 06 Apr 2008 11:46:08 GMT

Unlike the traditional Ranorex API, the new Web Automation API is natively provided only for .NET languages. However, there are two easy ways how you can still use Python with Ranorex Web Automation.

Twist: Talking to the ZODB in Twisted Reactor Calls

Mon, 31 Mar 2008 13:37:04 GMT

The twist package contains a few functions and classes, but primarily a helper for having a deferred call on a callable persistent object, or on a method on a persistent object. This lets you have a Twisted reactor call or a Twisted deferred callback affect the ZODB. Everything can be done within the main thread, so it can be full-bore Twisted usage, without threads.

Corotwine - Coroutines for Twisted in Launchpad

Mon, 31 Mar 2008 13:32:48 GMT

Corotwine lets you use Twisted in a blocking API. Currently this requires Greenlet, but using other coroutine implementations like stackless is a future possibility.

TimeVault

Sun, 23 Mar 2008 12:01:04 GMT

TimeVault is a simple front-end for making snapshots of a set of directories. Snapshots are a copy of a directory structure or file at a certain point in time. Restore functionality is integrated into Nautilus - previous versions of a file or directory that has a snapshot can be accessed by examining the properties and selecting the 'Previous Versions' tab.

SWFファイルフォーマットとライセンス

Sun, 23 Mar 2008 11:58:56 GMT

今回は、SWFを弄るときに必ず理解しておかないといけない、ライセンスに関する注意点をまとめてみます。まず、公式なSWFファイルフォーマットの資料として、Adobe Systems Inc. (以降、Adobe) が"SWF and FLV File Format Specification" (以降、公式仕様)を公開されています。

CarotDAV

Sun, 23 Mar 2008 11:52:32 GMT

VistaのWebDAV実装があまりにひどくて使い物にならないので、 VBや.Netの勉強も兼ねて適当に作ったシングルペインのWebDAVクライアントです。

WebDAV による Web パブリッシング

Sun, 23 Mar 2008 11:44:00 GMT

Sun ONE Web Server 6.1 は、Web ベースの共同作業の標準として広く採用されている WebDAV (Web-based Distributed Authoring and Versioning) をサポートしています。WebDAV は HTTP/1.1 プロトコルの拡張で、クライアントがリモート Web コンテンツのオーサリング操作を行えます。

WebDAVによるファイルのプロパティ操作

Sun, 23 Mar 2008 11:44:00 GMT

では，WebDAVでどのようにしてファイルのプロパティを操作するのかについて説明する。とはいえ，WebDAVは範囲が広い規格であり，その全機能を紹介することは到底できない。そこで本稿では，Exchange 2000 Serverを利用するのに必要になるであろうプロパティの取得と設定ならびに検索についてのみを扱う。その他の操作方法については，RFC2518や Exchange 2000 Platform SDK（http://msdn.microsoft.com/exchange/）に含まれるヘルプファイルを参照してほしい。

レガシーエンコーディングについて

Sun, 23 Mar 2008 11:35:28 GMT

近年のオープンソースソフトウェア（以下OSSとする）では、文字コードの内部処理をUnicodeで行うことにより、国際化に対応している。これにより、日本語環境で使用する際にも、日本語メッセージを用意する他は、特別なローカライズ作業を必要としなくなっている。しかし、依然としてUnicodeとレガシーエンコーディングとの変換では、次のような問題が発生している。これらのような事象が Windows/UNIXからのシステム移行やデータ連係において発生し、Linuxの採用時に問題となることがある。

Google Contacts and CardDAV

Sun, 23 Mar 2008 11:26:56 GMT

Almost as if in answer, yesterday Google announced the release of the Contacts API, which is AtomPub/GData based. Unlike CardDAV, it’s not based on vCard, which is both a blessing and a curse, since lots of popular contact systems (like the Mac address book) know how to export vCard information, and because vCard provides a very rich model for information about people. I’m not sure whether this is progress or not.

JavaScript WebDAV Client

Sun, 23 Mar 2008 11:24:48 GMT

The library is compliant with WebDAV RFC 2518 and allows management of Class 1 and Class 2 complaint WebDAV servers. With IT Hit AJAX Library you can copy, move and delete items, read and set custom properties, lock items and discover locks. It is written entirely in JavaScript and supports IE, Firefox, Safari and Netscape.

Dropbox: みんなが待ち望んでいたオンラインストレージソリューションかも

Sun, 23 Mar 2008 11:20:32 GMT

Dropboxは、今日から正式にプライベートベータに入ったところで（TechCrunch読者200名を招待、無料ストレージ5GB）、その背後にあるのは、デスクトップのファイルを「クラウド」と同期するのに手間がかかるべきではない、という発想だ。そこで、3 人のファウンダーは、パソコンのふつうのフォルダーと同じように見えるデスクトップクライアントをPythonベースで作った（PC用、Mac用どちらもある）。このフォルダーの中のファイルは、パソコン上の他のファイルと同じように扱う（追加、編集、コピー、削除）ことができて、変更が加えられると自動的に、Amazon S3ベースのDropboxのストレージと同期する。これが早い。

Provider for Google Calendar :: Sunbird Add-ons

Sun, 23 Mar 2008 11:20:32 GMT

This extension allows Sunbird and Lightning to read and write events to a Google Calendar.

Python-Ogre

Sun, 23 Mar 2008 11:18:24 GMT

Welcome to the Python-Ogre site. Python-Ogre is a free open source Python interface to a wide range of C++ libraries. Focused primarly on supporting the Ogre 3D graphics library and other Graphics and Gaming libraries. Python-Ogre allows developers to focus on their 'application', taking advantage of the simplicity of Python with the performance and functionality of the underlying libraries.

Multiverse 3D

Sun, 23 Mar 2008 11:14:08 GMT

MV3D is an open source virtual world simulation framework written in Python. It was designed with scalability in mind and aims to be able to distribute a world across as many servers as needed while dynamically balancing the load. The simulation framework is not specifically slanted towards any one genre of online game, and can just as easily be used for a space game as a fantasy setting. Objects on a MV3D server are simulated using the ODE physics engine for realistic physics reactions. A single server can host thousands of of simulated objects. By using Python-Ogre on the client, players can have amazing 3d visuals while within the game.

Pylot

Sun, 23 Mar 2008 11:09:52 GMT

Pylot is a free open source tool for testing performance and scalability of web services. It runs HTTP load tests, which are useful for capacity planning, benchmarking, analysis, and system tuning.

VNC60

Mon, 21 Jan 2008 01:40:16 GMT

Control a Linux Box via Symbian phones 2nd & 3nd

PSSC

Mon, 21 Jan 2008 01:38:08 GMT

Webcam/ScreenCapture for Symbian phones 2nd & 3nd