Concurrency issues in taglib.py

Hi there,

we're using spyce in a multithreaded process and are getting an
exception in taglib.py:

ValueError: list.remove(x): x not in list

This happens on line 55 in taglib.py:

54:    sys.path.reverse()
55:    sys.path.remove(os.path.dirname(self.stack[-1]._lib.__file__))
56:    sys.path.reverse()

It would seem from our logs that several threads try to manipulate
sys.path, resulting in the exception.

And looking at the code, it will certainly break in such a situation...

Do you agree?  Is this a bug?

-i


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