Raymond Hettinger <raymond.hettin...@gmail.com> added the comment:

Here's another way to think of it:  

The call s[i] raising an IndexError isn't a numerical error, it is a conceptual 
error.  Knowing that i==15 and len(s)==10 doesn't usually help resolve the 
problem.  The fix typically isn't replacing s[i] with s[i - 5].  Usually the 
issue is usually deeper than that.

Note, this is different than KeyError where misspellings are common and where 
the fix can be indicated by knowing the key:   d['missteak'] -> d['mistake'].

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue44166>
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