Buildbot no longer supports Python 2.7 on the Buildbot master.
5.60. Release Notes for Buildbot
The following are the release notes for Buildbot
This version was released on September 28, 2016.
See Upgrading to Buildbot 0.9.0 for a guide to upgrading from 0.8.x to 0.9.x
For a more detailed description of the changes made in this version, see the git log itself:
git log v0.9.0rc3..v0.9.0rc4