About me

Hello! I am Petri Lehtinen, a Finnish software developer who mostly hacks in Python, C and Javascript. In the Internet, I'm sometimes also known as “akheron” or “akhern”. To contact me, drop an email to my first name at this domain (address obfuscated to avoid spam), or /msg akheron in IRCnet or freenode.

I have a few projects and I also try to update my blog every now and then.

I use Ubuntu, Emacs and Git.

My PGP public key is available here. Its fingerprint is B5D6 953E 6D50 59ED 7ADA 0F2F D365 7D24 D058 434C. I use the key mainly to sign tarballs that I create for the releases of my projects.

In the past, releases were signed with my old key. It's still available here.

Me around the web:


All the projects here are free open source software.

Projects I've started and am the main author of:

Python is my favourite programming language, and I'm one of its core developers.

Other significant projects I've contributed to, more or less:


I worked for the Department of Software Systems in Tampere University of Technology for a few years. This is a list of research papers I worked on during that period:

In real life...

I have a wife and four kids, and that's why I don't have much time to work on my hobby projects. And, to make things clear, I'm completely happy with this situation :-)