[Python-3000] About "daemon" in threading module

[Jesus Cea]

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First we had "thread.setDaemon()". This was not PEP8, so Python 3.0
renamed it to "thread.set_daemon()". Lately Python 3.0 changes the
method to an attribute "thread.daemon".

I think the last change is risky, because you can mistype and create a
new attribute, instead of set daemon mode. Since daemon mode is only
usually visible when things goes wrong (the main thread dies), you can
miss the bug for a long time.

Similarly with the new "thread.name" attribute.

I would rather revert to the method style, or redo the class to avoid
new attribute creation, maybe via some "thread.__setattr__()" magic.

Sorry if this issue is already discussed. I don't find any previous
thread about this.

PS: If you mistype the method name, you get an error. If you mistype the
attribute assignment, the bug goes unnoticed.

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