[Python-ideas] Deprecate str.find

[M.-A. Lemburg]

Georg Brandl wrote:
> By the way: str.index() raises ValueError, not IndexError, if the substring
> isn't found.  That's one argument against "the index() API is foolproof,
> while the find() API isn't".

That's because the *value* passed as argument to .index() isn't
found. Which error class to use often depends on your view point,
so in some cases it may seem natural to you, in others you have
a different POV, and it feels wrong :-)

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