• PyFlame: profiling running Python processes

   · 05 Oct 2018

  Identifying performance bottlenecks in long-running processes often involves careful instrumentation ahead or guessing where the root of the problem may be. A very welcome set of tools are the ones that help you diagnose problems of live systems without modifying them. One important tool I recently came across is the pyflame profiler.

• Use Numba to work with Apache Arrow in pure Python

   · 03 Aug 2018

  Apache Arrow is an in-memory memory format for columnar data. In more “plain” English, it is a standard on how to store DataFrames/tables in memory, independent of the programming language. One of its most prominent uses is for the @pandas_udf decorator in Apache Spark to move data quickly between Scala and Python/pandas.

• AHL Python Hackathon April 2018

   · 19 May 2018

  Three weeks ago MAN AHL organised an opensource hackathon at their London office. As part of the Hackathon people should contribute to one of the PyData artifacts they regularly use. To support them in making their first contribution, AHL also coordinated that several core committers of opensource projects were present at the event. I joined in as the representative...

• Play interactively with Apache Arrow C++ in xeus-cling

   · 17 Dec 2017

  Often, we use pyarrow in a Jupyter Notebook during work. With the xeus-cling kernel, we can also use the C++ APIs directly in an interactive fashion in Jupyter.

• Akka Streams for extracting Wikipedia Articles

   · 24 Feb 2016

  Use Akka Streams as a new technique to extract specific articles from the Wikipedia xml dump into single files without the need to fit all data into RAM.

• Beats Music Support in Tomahawk (and the long journey on how we got there)

   · 18 Jul 2014

  tl;dr: With the latest nightlies (Win, Mac) you can now use your Beats Music Subscription in Tomahawk. To use it just install the Beats Music Resolver. Although Beats has a nice API, supporting it was a though cruise through our underlying multimedia stack.

• How to get global media keys support for Tomahawk in XFCE4

   · 03 Jul 2014

  Although there seems to be no native support for controlling a media player via the MPRIS specification in XFCE, you can still set up global shortcuts to use the media keys on your keyboard to control Tomahawk regardless of which application currently has focus.

• Replace QJson with Qt's own JSON handling in Qt5

   · 29 May 2014

  tl;dr: A simple wrapper to use QJson for Qt4 and the built-in JSON parser for Qt5 so that QJson is not required if built with Qt5: qjson-qt5json-wrapper (MIT-licensed, no #ifdef in your code).

• Using Tomahawk resolvers in node.js

   · 28 Jan 2014

  tl;dr: I wrote a node.js module so that you can use packaged Tomahawk AXE archives in your node.js application for querying music services with a unified interface, see node-tomahawkjs

• Use Media Keys to control Tomahawk in Awesome WM

   · 29 Jan 2013

  Nowadays for controling a mediaplayer the MPRIS specification exists, sadly this interface seems unsupported by awesome. One solution would be to add some lines to the configuration of xbindkeys and to start it in the background. But as awesome already can handle global keybindings adding these lines to your .config/awesome/rc.lua will transmit the actions of...

• tomahawk-0.6.0beta1 added to Gentoo Overlay

   · 10 Jan 2013

  Yesterday was the release of the first beta for Tomahawk 0.6.0. Tomahawk is a music player which decouples the name of the song from the source it is streamed from. Using the Playdar API it resolves the location from where to stream using all of your available sources.

• Songride Beta available for testing

   · 07 Jan 2013

  About 3 years ago I made a little mashup using Ruby, Google Charts API and the Last.fm API and a bit of magic that listed you from where your favorite artist were coming from. As an example this was the chart output for my favorite artists:

• spotify-0.8.8.323 added to Gentoo Overlay

   · 06 Jan 2013

  Some weeks ago Spotify released a preview of their new discovery features and gave some people the option to test it on Windows or Mac. Last Thursday they released their discovery features for the linux version.

• redis and hiredis added to Gentoo Overlay

   · 23 Dec 2012

  While I was writing some more code for songride I felt that I should have the latest redis version installed. After running emerge '>=dev-db/redis-2.4.17' I was confronted with the following error message:

• ktoblzcheck bindings for Node.JS

   · 07 Dec 2012

  Checking the correctness of a combination of bank identification number (BLZ) and account number is a complicated task in Germany. There are about 140 different methods how this combination is checked depending on the bank from which the combination originates. A library which solves this problem is ktoblzcheck. At the moment you could use it simply as a C++...