Exception Messages

[Wanderer]

On Monday, October 15, 2012 12:34:53 PM UTC-4, MRAB wrote:

> 
> Yes, but you've put the message in msg, and Exception doesn't have that
> 
> attribute.
> 

That's weird. I got this Exception class definition idea from this post by Guido van Rostrum, Where he gives this main function to look like

import sys
import getopt

class Usage(Exception):
    def __init__(self, msg):
        self.msg = msg

def main(argv=None):
    if argv is None:
        argv = sys.argv
    try:
        try:
            opts, args = getopt.getopt(argv[1:], "h", ["help"])
        except getopt.error, msg:
             raise Usage(msg)
        # more code, unchanged
    except Usage, err:
        print >>sys.stderr, err.msg
        print >>sys.stderr, "for help use --help"
        return 2

if __name__ == "__main__":
    sys.exit(main())




http://www.artima.com/weblogs/viewpost.jsp?thread=4829