On 11-7-2015 12:38, Irmen de Jong wrote:
On 11-7-2015 12:26, candide wrote:
0 + not 0
File "<stdin>", line 1
0 + not 0
^
SyntaxError: invalid syntax
What is syntactically wrong with 0 + not 0?
I would say that the boolean operator 'not' cannot occur in an arithmetic
expression.
Maybe you meant to use the bitwise not:
0 + ~0
-1
Irmen
It can occur in an arithmetic expression, and 'not' has a higher
precedence than '+'
(https://docs.python.org/2/reference/expressions.html#operator-precedence)
0 + not 0
should evalutate to
0 + True
1
just like this does:
0 + (not 0)
1
True + True
2
But, it gets confusing......
>>> not 0 + 1
False
>>> not 0
True
>>> True + 1
2
>>>
i would expect 'not 0 + 1' to return the same value as 'True + 1'
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