exception message output problem

[Lie]

PPS: Actually, what makes a tuple is both the parens and the comma,
with comma as the minimum signifier, inspect this: "str(a) +
str((a,b,c))", you have to use the double parens, one to make the
tuple and the other as part of the str. This harmless little case
gives error if done without the double parens, but what would happen
if we exchange the str into a function that accepts one argument and
several optional arguments (or better yet, one argument and an
optional * argument)?