print('sum of 1st items = %d' % sum([float(v[0]) for v in list(dictData.values())]))
print('sum of 2nd items = %d' % sum([float(v[1]) for v in list(dictData.values())]))
print('count of zeros   = %d' % sum([(float(v[0]) == 0) for v in list(dictData.
    values())]))
Суммирование значений в словаре списков