Python style: exceptions vs. sys.exit()

[Bruno Desthuilliers]

Drake a écrit :
> I have a general question of Python style, or perhaps just good
> programming practice.
> 
> My group is developing a medium-sized library of general-purpose
> Python functions, some of which do I/O. Therefore it is possible for
> many of the library functions to raise IOError Exceptions. The
> question is: should the library function be able to just dump to
> sys.exit() with a message about the error (like "couldn't open this
> file"), 

Arrghll ! NO, DONT !

> or should the exception propagate to the calling program which
> handles the issue?

Yes, by all means and for God's sake.

> Thanks in advance for anyone who can either answer my question or
> point me to where this question has already been answered.

There have been numerous threads about this here.