I have a list called agents containing Agent objects.  Each object has a solved property which is a list, for example:
Agent.solved = [300, 50, 100, 7]
The length of each list is different.  I want to print results like this but I want the output ordered by the length of the solved property. How can I sort it that way?
for _id, obj in agents.items():
  print(obj, 'solved', len(obj), 'tickets')
