import sys
import shelve

s = shelve.open(sys.argv[1])
print s

# {'count': 10000, 'tasks': defaultdict(<type 'int'>, {'m5-2-1.local-31671': 10000}), 'extra': 256, 'receive': 1148.0290439128876, 'submit': 4.298105001449585, 'participants': 1, 'order': 5}

for k in sorted(s):
  run = s[k]['stats']
  print run['tasks']
  print run['participants'], run['receive'] / run['count']