PyData Berlin will be hosted at the Treskowallee Campus of the Berlin University of Applied Sciences (HTW Berlin, Treskowallee).
The Treskowallee Campus is located on the U5 subway line approximately 15 minutes from Alexanderplatz. There is a 5 minute walk from the subway station to the University Campus.
The M17 Tram stops directly in from of the Treskowallee Campus, the stop name is Treskowallee/HTW (Berlin).
You can find more information on transport routes and associated costs in Berlin at the website for Berlin's Public Transport Office BVG http://fahrinfo.bvg.de/. BVG also has a mobile app with live transport times and route search, you can also use the app to buy tickets for all public transport in the Berlin area.