[Python-3000] Making more effective use of slice objects in Py3k

[Barry Warsaw]

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On Aug 28, 2006, at 9:20 PM, Greg Ewing wrote:

> I'm also not all that happy about forcing slice indices to
> be ints. Traditionally they are, but someone might want to
> define a class that uses them in a more general way.

In fact, we do.  Our application is simulated execution of source  
code, so there are cases where we have multiple values due to  
indeterminate conditionals.  For example, we might know that the  
variable "x" has a value between 1 and 5, and we might know that "z"  
is a string with the value "hello there world".  We want to be able  
to index z with Range(1,5) or slice it with say Range(1,5):Range 
(3,7).  Our "z" value is represented by a string-like object that  
presents much of the standard Python string API, so it knows what to  
do with wacky slices with non-integer indices.  We'd definitely want  
to preserve the ability to do that.

- -Barry

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