>>> -1 is True
False
>>> (not -1) is True
False
Something to remember when messing with functions which can return negative numbers.
Update: Solution here is to use not not syntax
>>> (not not -1) is True
True
>>> not (not not -1) is True
False
>>> (not not 1) is True
True
>>> not (not not 1) is True
False
3 yorum:
>>> not -1 is True
True
>>> (not -1) is True
False
I don't get it. :/
Well because "is" operator have precedence over "not".
>>> not (-1 is True)
True
Sent this to my Python-expert friend; your post makes sense, since -1 and True *are* different objects:
>>> 1 is True
False
>>> bool(1) is True
True
>>> -1 is True
False
>>> bool(-1) is True
True
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