Python equivalent to Perl's warn/confess/die

[greg Landrum]

Andy Lester wrote:
> 
> I looked in the Perl/Python phrasebook and didn't see anything that
> discusses an easy way to write warnings to the screen.
> 
> For instance, in Perl if I wanted to write something to stderr to show
> where in my process I am, I'd say:
> 
>   warn "$n records read";
> 
> Now, I know I can say
> 
>   sys.stderr.write( '%s records read' % n )
> 
> But is there a module somewhere that encapsulates that so I don't
> explicitly send it to stderr?

You could write your own.  Put this in a file called warn.py which lives
somewhere in your PYTHONPATH:
 
import sys

__warningDest = sys.stderr

def warn(msg):
    __warningDest.write(msg + '\n')


then you can do:
from warn import warn
warn('beware the Jabberwock')


-greg

-- 

greg Landrum (greglandrum at earthlink.net)
Software Carpenter/Computational Chemist