select.kqueue.control changelist argument

[Ritesh Nadhani]

Hi

According to the docs at, http://docs.python.org/library/select.html

    Low level interface to kevent

        * changelist must be an iterable of kevent object or None
        * max_events must be 0 or a positive integer
        * timeout in seconds (floats possible)

I am not sure I understood what happens when I pass *None* as
parameter to the method.

Can somebody point me to the right direction?

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