[Tutor] exceptional behaviour

[paul]

Date sent:      	Wed, 23 Jan 2002 11:00:55 -0800
To:             	"paul" <polb@cableinet.co.uk>
From:           	Kirby Urner <urnerk@qwest.net>
Subject:        	Re: [Tutor] exceptional behaviour
Copies to:      	tutor@python.org

Here's the code for the catcher:

import raiserr
try:
    raiserr.div42()
except "problem":
    print "number must be greater than zero"
except "problem 2":
    print"42, obviously"

Here's the code for the thrower (raiserr.py):

def div42():
	denominator=input("What value will I divide 42 by?\n")
	if denominator == 0:
		raise "problem"
	elif denominator == 1:
		raise "problem 2"
	else:
		print 42/denominator




the first exception works fine, the second gives me this:

Traceback (most recent call last):
  File "<pyshell#4>", line 1, in ?
    raiserr.div42()
  File "D:\Python21\raiserr.py", line 6, in div42
    raise "problem 2"
problem 2

removing the space from the raise string allows it to work just fine, 
it's not a problem, but it's hard to see why it should differentiate 
between strings with spaces and those without.

cheers
Paul


> 
> >
> >def div42():
> >         denominator=input("What value will I divide 42 by?\n")
> >         if denominator == 0:
> >                 raise "first problem"
> >         elif denominator == 1:
> >                 raise "second problem"
> >         else:
> >                 print 42/denominator
> >
> >doesn't
> 
> What error message to you get for the 2nd example?
> Seems to work fine in 2.2:
> 
>   >>> div42()
>   What value will I divide 42 by?
>   0
>   Traceback (most recent call last):
>     File "<pyshell#16>", line 1, in ?
>       div42()
>    File "<pyshell#15>", line 4, in div42
>       raise "first problem"
>   first problem
> 
> Kirby
>