Nick Coghlan added the comment:

No, an empty ExitStack() instance already works fine as a no-op context manager 
in 3.3: 
http://docs.python.org/3/library/contextlib#simplifying-support-for-single-optional-context-managers

We're not going to add a dedicated one under a different name.

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<http://bugs.python.org/issue10049>
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