[Tutor] Trapping Interpreter errors as a string
Wed, 28 Feb 2001 18:07:27 +0100
On Wed, Feb 28, 2001 at 07:58:42AM -0900, Tim Johnson wrote:
> Hi Danny:
> > It sounds like you might want to use exception handling: Exception
> > handling often takes the place of error codes in Python programming.
> I was familar with exeception handling in rebol and C++ when I posted that
> question. What I was looking for was the broadest possible "net",
> the reason for asking about an error code, was that, if such existed,
> I could modify the error messages.
The broadest possible net is the simple except: clause that catches
x = int("whee")
# Do anything you want here; the current exception is in
exception, argument, traceback = sys.exc_info()
# See also the traceback module for printing info
if exception is ValueError:
print "Make sure that the string you give to int() has only numbers."
# Re-raise every exception you can't handle, like out of memory errors,
# or KeyboardInterrupt (a user hitting ctrl-C)