"""字典中嵌套字典"""users = {
    'wen': {
        'first': 'zhou',        'last': 'wen',        'location': 'hubei'    },    'tao': {
        'first': 'zhou',        'last': 'tao',        'location': 'hubei'    }
}

for username,userinfo in users.items():
    print('username:'+username)
    fullname = userinfo['first']+userinfo['last']
    location = userinfo['location']
    print('fullname:'+fullname)
    print('location:'+location)
    print('\t')