import yaml
     
     object1 = {
         'name': 'Ingy dot Net',
         'number': 42,
         'needs': [
             'sex',
             'drugs',
             'rock and roll'
         ]
     }
     
     yaml1 = yaml.dump(object1)
     object2 = yaml.load(yaml1)
     yaml2 = yaml.dump(object2)
     
     if yaml1 == yaml2:
         print yaml1
     else:
         raise Exception(yaml1 + "!=\n" + yaml2)