Is there a Pythonic way of activating 'else' in a 'for' loop, when a continue has hit?

Question

Reading this post didn't really answer my question.

I have a

reader = csv.reader(source)
for row in reader:
    if len(row[0]) > 23:
        # Do stuff
        continue
    if low > float(row[1]) > high:
        # Do stuff
        continue
    if low > float(row[2]) > high:
        # Do stuff
        continue
else:
    print('All', reader.line_num, 'read successfully.')

setup, but the else is executed despite me skipping in the for loop.

I'd rather that the else was only called if no continue was hit.

In order to clarify, the purpose of the code is to drop bad/malformed data rows in the CSV file. As such, malformed lines have individual error handling. Using 'else' as final notifier would, if possible be much more beautiful than working with flags.

You should explain with example input what you are expecting as output. — Anand S Kumar, Oct 14 '15 at 04:39
`else` is called if the for loop exits due to exhausting the iterator, you would need a `break` to avoid the `else` being called. — AChampion, Oct 14 '15 at 04:43
I think using a flag variable like `continued = True`, while not particularly pythonic, is the best option. — zehnpaard, Oct 14 '15 at 04:45

score 4 · Accepted Answer · answered Oct 14 '15 at 04:44

4

The only thing that matters to else is whether or not the loop terminated because you reached the end of the iterable; it doesn't care what happens inside the loop.

If you want to have different behavior depending on if continue was ever called, then you have to keep track of that yourself.

answered Oct 14 '15 at 04:44

Fair enough. I'll have to keep track of rows skipped manually then. – Pebermynte Lars Oct 14 '15 at 06:58

Is there a Pythonic way of activating 'else' in a 'for' loop, when a continue has hit?

1 Answers1