Title: Modern Python at the Large Synoptic Survey Telescope,
Abstract: The LSST software systems make extensive use of Python, with almost all of it
initially being developed solely in Python 2. Since LSST will be commissioned
when Python 2 is end-of-lifed it is critical that we have all our code support
Python 3 before commissioning begins. Over the past year we have made
significant progress in migrating the bulk of the code from the Data Management
system onto Python 3. This paper presents our migration methodology, and the
current status of the port, with our eventual aim to be running completely on
Python 3 by early 2018. We also discuss recent modernizations to our Python
codebase.