Hey,
I created a patch for nfs-utils Python 3 compatibility and I was suggested by J. Bruce Fields to send it to you.
Basically, I ran the scripts through "2to3" and made few hand adjustments. With these patches, scripts will work on Python 2.6+, including Python 3.
Would you accept such a patch upstream?
Thanks a lot for considering!

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Regards,
Bohuslav "Slavek" Kabrda.