exceptions.AttributeError: 'function' object has no attribute 'PrettyPrinter'
/usr/lib/python2.7/dist-packages/buildbot/process/buildstep.py:301 in startStep
300            else:
301                doStep = yield self.doStepIf(self)
302
/data/buildbot/masters/firmware/master.cfg:179 in checkDoClean
178    build = step.build
179    pp = pprint.PrettyPrinter(indent=2)
180    pp.pprint( build )
exceptions.AttributeError: 'function' object has no attribute 'PrettyPrinter'