qa/secure/*.py scripts don't work with python3?

[Ken McDonell <kenj@xxxxxxxxxxxxxxxx>]

kenj@vm05:~/src/pcp/qa$ python3.4 secure/pcppdu.py
  File "secure/pcppdu.py", line 260
    print "len string =", len(blob)
                       ^
SyntaxError: invalid syntax

but this is OK ...

kenj@vm05:~/src/pcp/qa$ python2.7 secure/pcppdu.py

This is from qa/547 where python is invoked directly (so it is 
lotto-time for the version you get).
Do the Python scripts need to be fixed to work for all versions of 
Python (the non-programming language, IMHO)?
Or does the QA scripts need to sniff out Python Version 2.? and run that 
explicitly, else give up?