cleanbb.py failing on builds with python < 2.5

Traceback (most recent call last):

  File "buildscripts/cleanbb.py", line 82, in ?

    cleanup( root , options.nokill )

  File "buildscripts/cleanbb.py", line 60, in cleanup

    if killprocs() > 0:

  File "buildscripts/cleanbb.py", line 47, in killprocs

    pid = x.partition( " " )[0]

AttributeError: 'str' object has no attribute 'partition'