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Sat Aug 12 19:07:52 CEST 2006 · http://mail.python.org/pipermail/python-dev/2006-August/068203.html

On Sat, 12 Aug 2006 18:57:02 +0200, tomer filiba <tomerfiliba at gmail.com> wrote:
>
>the logic is simple: every `x` is either contained in `y` or not.
>if `x` *cannot* be contained in `y`, then the answer is a "strong no",
>but that's still a "no".
>

def blacklisted(o):
    try:
        # Is the object contained in the blacklist set?
        return o in _blacklistset
    except TypeError:
        # If it *cannot* be contained in the blacklist set,
        # then it probably isn't.
        return False

Jean-Paul

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[Python-Dev] dict containment annoyance