concise code (beginner)

Karthik Gurusamy kar1107 at gmail.com
Wed Sep 5 21:23:08 CEST 2007


On Sep 5, 11:17 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> bambam wrote:
> > I have about 30 pages (10 * 3 pages each) of code like this
> > (following). Can anyone suggest a more compact way to
> > code the exception handling? If there is an exception, I need
> > to continue the loop, and continue the list.
>
> > Steve.
>
> > -----------------------------------
> > for dev in devs
> >     try:
> >         dev.read1()
> >     except
> >         print exception
> >         remove dev from devs
>
> > for dev in devs
> >     try:
> >         dev.read2()
>
> [etc.]
>
> My keen sense of pattern recognition tells me that all of your read's
> follow the same naming pattern--or was that just an accidental naming
> coincidence on your part for the sake of example?
>
> for i in xrange(number_of_reads):
>    for dev in devs:
>      try:
>        _reader = getattr(dev, 'read%d' % i)
>        _reader()
>      except Exception, e:
>        print e
>        devs.remove(dev)

I see in many of the solutions suggested above, the devs sequence/
iterator is being modified while iterating. I know it is not defined
for interation over dictionary keys. Are they defined for other
collections like lists?

Karthik

>
> James
>
> --
> James Stroud
> UCLA-DOE Institute for Genomics and Proteomics
> Box 951570
> Los Angeles, CA 90095
>
> http://www.jamesstroud.com/





More information about the Python-list mailing list