David Eppstein wrote:
In article <[EMAIL PROTECTED]>,
"Robert Brewer" <[EMAIL PROTECTED]> wrote:
But I'm guessing that you can't index into a generator as if
it is a list.
row = obj.ExecSQLQuery(sql, args).next()
I've made it a policy in my own code to always surround explicit calls
to next() with try ... except StopIteration ... guards.
Otherwise if you don't guard the call and you get an unexpected
exception from the next(), within a call chain that includes a for-loop
over another generator, then that other for-loop will terminate without
any error messages and the cause of its termination can be very
difficult to track down.
Isn't the handling of StopIteration confined in the very moment of
calling .next() ? This was what I expected... and from a simple test
looks also what is happening...
>>> for x in xrange(10):
if x == 8:
raise StopIteration()
print x
0
1
2
3
4
5
6
7
Traceback (most recent call last):
File "<pyshell#7>", line 3, in -toplevel-
raise StopIteration()
StopIteration
i.e. the loop didn't stop silently
Andrea
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