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Fri Jul 2 22:44:55 CEST 2010 · https://mail.python.org/pipermail/python-dev/2010-July/101367.html

On 7/2/2010 12:43 AM, Glyph Lefkowitz wrote:

>> def f(): return 1 + "1"
>>
>> instead of compiling something which can't fail to raise an
>> exception, would that still be a legal Python implementation?
>
> I'd say "no".  Python has defined semantics in this situation: a
> TypeError is raised.

The manuals are rather inconsistent about defining the exception 
semantics. Some parts define the exception returned. Other, equivalent 
parts, do not. I should start a separate thread on this when I find the 
examples I once had.

-- 
Terry Jan Reedy

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[Python-Dev] Can Python implementations reject semantically invalid expressions?