[Q] Are Exceptions used that much in practice?

[Jonathan Giddy]

David Bolen <db3l at fitlinxx.com> writes:

] In the case of IOError that does imply parsing a string and assuming
] it starts with [Errno #], which is sort of crufty.  But other
] exceptions (such as those from win32all) are fairly standardized as a
] tuple with the code as the first element - something I also tend to do
] with my own user exceptions in my code.

Note that now that the standard exceptions are classes, IOError instances 
have an errno attribute, which is even nicer than using tuple values.

try:
    f = open(filename, 'r'):
except IOError, exc:
    if exc.errno == errno.ENOENT:
        pass
    else:
        raise