3>0 is True
michael.ricordeau at gmail.com
Wed Sep 15 15:03:31 CEST 2010
Not really true for ">" and "is" :
Operator ">" and operator "is" are in the same precedence but in group Comparisons :
"Operators in the same box group left to right (except for comparisons, including tests, which all have the same precedence and chain from left to right — see section Comparisons"
The important words here are :
"all have the SAME PRECEDENCE and chain from left to right"
See also :
So for :
>>> 3 > 0 is True
#first evaluation is :
>>> 3 > 0 ---> True
#second evaluation is :
>>> 0 is True ---> False (and second evaluation is not result of first one !)
Le Wed, 15 Sep 2010 14:47:11 +0200,
Michael Ricordeau <michael.ricordeau at gmail.com> a écrit :
> Because "is" operator take precedence on ">" operator .
> Le Wed, 15 Sep 2010 05:34:06 -0700 (PDT),
> Yingjie Lan <lanyjie at yahoo.com> a écrit :
> > Hi,
> > I am not sure how to interprete this, in the interactive mode:
> > >>> 3>0 is True
> > False
> > >>> (3>0) is True
> > True
> > >>> 3> (0 is True)
> > True
> > Why did I get the first 'False'? I'm a little confused.
> > Thanks in advance for anybody who shed some light on this.
> > YL
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