On Thu, Aug 5, 2010 at 8:56 AM, Roald de Vries <downa...@gmail.com> wrote: > On Aug 5, 2010, at 5:42 PM, wheres pythonmonks wrote: >> How does "x is not None" make any sense? "not x is None" does make sense. >> >> I can only surmise that in this context (preceding is) "not" is not a >> unary right-associative operator, therefore: >> >> x is not None === IS_NOTEQ(X, None) >> >> Beside "not in" which seems to work similarly, is there other >> syntactical sugar like this that I should be aware of? > > 'not None' first casts None to a bool, and then applies 'not', so 'x is not > None' means 'x is True'.
Absolutely incorrect. Read the final paragraph of http://docs.python.org/reference/expressions.html#notin Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
