Many people contributed to pysnmp by reporting problems, suggesting
various improvements or submitting actual code. The list goes
in a more-or-less chronological order:

Cameron Laird
Case Vanhorsen
Jarkko Torppa
Tim Kwiatkowski
Carlos Ribeiro
Chris Green
Doobee R. Tzeck
Jim Crumpler
Roy Smith
Mark Kilmartin
Matthew W. Samsonoff
John P Speno
Mike C. Fletcher
Wichert Akkerman
Hernan Perez Masci
Martin Jackson
Ivan Zderadicka
Randy Couey
Brian Kyckelhahn
Mark M Evans
Filippo Giunchedi at Truelite Srl
Matt Hooks
Zachary Lorusso
Floris Bruynooghe
Laurelin of Middle Earth
Robert Reese
Olivier Verriest
Eugene M. Kim
Matt Bullock
Thanks to Python Software Foundation for granting financial support 
for the project.