[issue39966] mock 3.9 bug: Wrapped objects without __bool__ raise exception

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

My guess is that it isn't so much that __bool__ is special, as that the evaluation of values in a boolean context is special.  What you have to do to make a mock behave "correctly" in the face that I'm not sure (I haven't investigated).  And I might be wrong.

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<https://bugs.python.org/issue39966>
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