scoping assertion

[Michael Hudson]

Isao AKIYAMA <Isao.Akiyama at unisys.co.jp> writes:

> > I use
> > try:
> >         raise None
> > except:
> >         ....
> 
> Wow!
> 
> >>> import sys
> >>> try: raise None
> .. except: print sys.exc_info()
> ..
> (<class exceptions.TypeError at 89a4e0>, <exceptions.TypeError instance
> at 8cc17
> 0>, <traceback object at 8cc150>)
> >>>
> 
> 'raise None' actually raises a TypeError ;-)

Well, it would. You can only raise strings, classes or instances as
exceptions:

Python 1.5.2+ (#2, Jul 14 1999, 00:03:34)  [GCC egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)] on linux2
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>> raise 4
Traceback (innermost last):
  File "<stdin>", line 1, in ?
TypeError: exceptions must be strings, classes, or instances
>>> 

So Python gets the thing being raised (None), checks it's type, finds
it wanting - and raises an exception. Ho hum. I cant work out whether
that is a) trivial b) deep c) working, but by lucky accident or d)
silly or e) this post is a complete waste of time. Or all of the
above.

Cheers,
Michael
 
> Isao AKIYAMA
> 

-- 
Oh, very funny. Very sar-cah-stic.         http://www.ntk.net
http://www.ntk.net/doh/options.html - ho ho