On 4/22/2012 9:34 PM, Steven D'Aprano wrote:
On Sun, 22 Apr 2012 12:43:36 -0700, John Nagle wrote:
On 4/20/2012 9:34 PM, john.tant...@gmail.com wrote:
On Friday, April 20, 2012 12:34:46 PM UTC-7, Rotwang wrote:
I believe it says somewhere in the Python docs that it's undefined and
implementation-dependent whether two identical expressions have the
same identity when the result of each is immutable
Bad design. Where "is" is ill-defined, it should raise ValueError.
"is" is never ill-defined. "is" always, without exception, returns True
if the two operands are the same object, and False if they are not. This
is literally the simplest operator in Python.
John, you've been using Python for long enough that you should know this.
I can only guess that you are trolling, although I can't imagine why.
Because the language definition should not be what CPython does.
As PyPy advances, we need to move beyond that.
John Nagle
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