[Python-Dev] PEP 3144 review. (original) (raw)

Terry Reedy tjreedy at udel.edu
Wed Sep 16 23:50:39 CEST 2009

Peter Moody wrote:

On Wed, Sep 16, 2009 at 1:35 PM, Antoine Pitrou <solipsis at pitrou.net> wrote:

Le Mon, 14 Sep 2009 09:44:12 -0700, Peter Moody a écrit :

Folks, Guido,

I believe PEP 3144 is ready for your review. When you get a chance, can you take a look/make a pronouncement? Besides what has already been said in the thread, I have a bunch of comments: It should be noted that len doesn't work as expected since python internals has this limited to a 32 bit integer and it would need to be at least 128 bits to work with IPV6. You should clarify what it means: does the result get truncated, or is an error thrown when it can't fit inside an int? I'll clarify this, but it looks like this: len(xrange(0xFFFFFFFFFFFFFFFFFFFFFFFFF)) Traceback (most recent call last): File "", line 1, in OverflowError: long int too large to convert to int basically, len(self): can only return an int. At least that's what I recall from the discussion.

FWIW, the limitation remains in Py3, with a modified error msg.

len(range(0xFFFFFFFFFFFFFFFFFFFFFFFFF)) Traceback (most recent call last): File "<pyshell#1>", line 1, in len(range(0xFFFFFFFFFFFFFFFFFFFFFFFFF)) OverflowError: Python int too large to convert to C ssize_t

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