"False exceptions?" (was Re: theme of the week: tools

[Peter Hansen]

Dan Perl wrote:
> I debugged one of my 
> scripts (that I knew it works) and got an unexplainable exception.  It turns 
> out that Wing IDE falsely detects some exceptions.  They know about it and 
> they suggest that if you KNOW that it's a false exception you should flag it 
> to be ignored.  Yes, Wingware people, I know it's a false exception, but 

What exactly is a "false exception"?  I have never heard of such
a thing, and can't imagine what it might be.  Python raises
exceptions, they are subclasses of Exception or (old-style)
strings, they have tracebacks, they come from a variety of
sources, there's lots of things to know about exceptions but
"falseness" is not something about which I'm aware...

-Peter