Re: [Python-ideas] with statement vs. try...except...finally

May 30, 2009


      Gerald Britton wrote:
...
I'm wondering if the "with" statement should have exception clauses
like the "try" statement, even though this seems to defeat part of the
reason for the "with" statement....
something like:
    try:
        f = open('foo')
        line = f.readline()
        f.close()
    except IOError:
        line = 'default'
... Fine so far, but what if I want to be more granular? ...
I can't see how to replace the above try-triplet with a "with"
encapsulation. Or, do I have to wrap the "with" statement in try like
this:
How about using the error information?:
     try:
         with open('pov_export/.hg/requires') as src:
             line = src.read(30)
     except IOError, why:
         line = 'Problem: %s' % why

--Scott David Daniels
Scott.Daniels@Acm.Org