confusion about Exception Mechanism

[Zachary]

Hello,
I'm relatively new at Python, and am slightly confused about how the
try...except mechanism is supposed to work.  I am just not sure how it would
be used, as it just seems that it is another sort of loop.  Is their any
sort of example I could look at, that has an example of how it is applied?
I haven't really seen any such full example.
Thanks, And Sorry for the newbie Question,
Zack