[Python-Dev] Problem in SRE ?

[Michael Hudson]

"M.-A. Lemburg" <mal@lemburg.com> writes:

> I've just run across a strange problem with SRE. The following
> code does not run with the current CVS version -- the program
> simply exists without notice even though there doesn't seem
> to be an exit() or abort() call in SRE.

Well, your regexp doesn't work for the given version:

> Note that sys.version is
> '2.2b1+ (#59, Nov  7 2001, 12:57:29) \n[GCC pgcc-2.95.2 19991024
> (release)]'
> 
> Any ideas ?
> 
> --
> import sys, re, string
> _sys_version_parser = re.compile('([\w.]+)\s*'

You need a \+? in here somewhere!  Or a + inside the [].

With this change, works fine on all Pythons I have here:

[mwh@starship mwh]$ /usr/local/bin/python foo4.py
2.1.1 (#1, Aug 23 2001, 22:12:58)
[GCC egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)]
('2.1.1', 1, 'Aug 23 2001 22:12:58', 'GCC egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)')
[mwh@starship mwh]$ /usr/bin/python foo4.py
1.5.2 (#1, Dec 21 2000, 15:29:08)  [GCC egcs-2.91.66 19990314/Linux (egcs-
('1.5.2', 1, 'Dec 21 2000 15:29:08', 'GCC egcs-2.91.66 19990314/Linux (egcs-')
[mwh@starship mwh]$ ~/bin/python foo4.py
2.2a4+ (#1, Oct 19 2001, 03:56:59)
[GCC egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)]
('2.2a4.0', 1, 'Oct 19 2001 03:56:59', 'GCC egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)')
[mwh@starship mwh]$ ~/src/python/dist/src/build/python foo4.py
2.2b1+ (#1, Nov  7 2001, 05:07:34)
[GCC egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)]
('2.2b1.0', 1, 'Nov  7 2001 05:07:34', 'GCC egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)')

Cheers,
M.

-- 
40. There are two
 ways to write error-free programs; only the third
    one works.
  -- Alan Perlis, http://www.cs.yale.edu/homes/perlis-alan/quotes.html