Re: [Python-Dev] PEP for adding an sq_index slot so that any object, a or b, can be used in X[a:b] notation

[Mark Russell]

On 10 Feb 2006, at 12:45, Nick Coghlan wrote: An alternative would be to call it "__discrete__", as that is the key  characteristic of an indexing type - it consists of a sequence of discrete  values that can be isomorphically mapped to the integers. Another alternative: __as_ordinal__.  Wikipedia describes ordinals as "numbers used to denote the position in an ordered sequence" which seems a pretty precise description of the intended result.  The "as_" prefix also captures the idea that this should be a lossless conversion. Mark Russell

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