[Python-3000] Droping find/rfind?

Greg Ewing greg.ewing at canterbury.ac.nz
Wed Aug 23 09:35:00 CEST 2006

Josiah Carlson wrote:

> One of the issues with the -1 return on find failure is that it is
> ambiguous, one must really check for a -1 return. Here's an API that is
> non-ambiguous:

An alternative would be to return None for not found.
It wouldn't solve the problem of people using the
return value as a boolean, but at least you'd get
an exception if you tried to use the not-found value
as an index.

Or maybe it could return index values as a special
int subclass that always tests true even when it's


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