Le 08/06/2014 18:44, R. David Murray a écrit :
For what it is worth, I found the discussion I was remembering:
http://bugs.python.org/issue7796
And as someone pointed out down thread, the actual check is "inherits
from tuple and has a _fields attribute".
That gets you a duck type, which is generally what you want in Python.
I think it's a bit complicated (and not obviously discoverable) as far
as duck-typing goes.
Regards
Antoine.
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