os.tmpname security risk?

[HyperHacker <hyperhacker@...>]

The 5.1 manual states, for os.tmpname():
> On some systems (POSIX), this function also creates a file with that name, to avoid security risks. (Someone else might create the file with wrong permissions in the time between getting the name and creating the file.)
But what stops someone from removing that file and creating their own,
or changing its permissions? It doesn't seem like this really
mitigates the risk at all.

-- 
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