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

Alex Martelli aleaxit at gmail.com
Tue Feb 14 00:53:31 CET 2006

On 2/13/06, Guido van Rossum <guido at python.org> wrote: ...

I don't like to add a built-in index() at this point; mostly because of Occam's razor (we haven't found a need).

I thought you had agreed, back when I had said that index should also be made easily available to implementors of Python-coded classes implementing sequences, more elegantly than by demanding that they code x.index() [I can't think offhand of any other special-named method that you HAVE to call directly -- there's always some syntax or functionality in the standard library to call it more elegantly on your behalf]. This doesn't neessarily argue that index should be in the built-ins module, of course, but I thought there was a sentiment towards having it in either the operator or math modules.

Alex

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