semantics of ** (unexpected/inconsistent?)

"Martin v. Löwis" martin at v.loewis.de
Mon Nov 30 02:03:46 CET 2009


>> I think you answered your own question. 3**2 comes first in the order
>> of operations, followed by the negation.
> 
> No, that's not the problem, I'm ok with the operator precedence of - vs **
> 
> My problem is why I don't get the same result if I use the literal -3 or
> a variable that contains -3 (x in my example).

There is no literal -3 in Python, only a literal (+)3, see

http://docs.python.org/reference/lexical_analysis.html#integer-and-long-integer-literals

So -3**2 means -(3**2) == -9.

Regards,
Martin



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