Python-解压缩nametuple列表

Question

I am using psutil.users() to get a list of namedtuples referencing each user on the system. I am trying to make a dictionary of just the names and terminal types and I am junking the rest. When I do this:

{user.name:user.terminal for user in psutil.users()}

I only get one of the users, not both. I know there are two there because I can print psutil.users() and see them both. I couldn't see what I was doing wrong so I did:

for user in psutil.users():
    print user.name
    print user.terminal

and it works just as intended. But my dict comprehension version doesn't. I can't see what I'm doing incorrectly.

Answer 1

In your case, it may be possible that both username is same and in dictionary we are required to have unique key. That is why you are getting only one key-value pair in your code.