Redundant `from six.moves import _thread` failed on mac os x

[Guy Rapaport]

I got an error saying "can't import thread_ from six.moves" and pointing me to this file:
/Library/Python/2.7/site-packages/dateutil/rrule.py

I nano'd it and what do I see?

    from six.moves import _thread

and some lines below, the only use of _thread was

            self._cache_lock = _thread.allocate_lock()

My version of six (1.9.0) did not have _thread defined inside its moves module (i.e. dir(six.moves) does not incldue _thread).
However, it seems you have been aiming at Python's ordinary thread module. I commented out your import and replaced it with:

    import thread as _thread

and everything started working back again.

So if there's no reason to import thread from within six.moves, I think you should ditch that.