Python中如何处理嵌套字典？

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字典中嵌套字典，直接输出结果：username: wenusername: tao

"""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')