Magnus Carlsson added the comment:
"The solution to that is to always have a test that your decorator actually
returns a function. That's what I do."
Yes, I agree that with more tests I would have found the problem, but sometimes
you forget things. And to me I want the tests to fail by default or for cases
that are unspecified.
I think the sentinel solution would come a long way of solving both the issue
that I reported but still keep the context solution intact.
Out of curiosity, would it be a solution to have the sentinel be a real
function?
def _sentinel():
pass
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<http://bugs.python.org/issue24134>
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