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'.
'not x is None' is the same as 'not (x is None)'
Cheers, Roald
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