Question on loops

[Delaney, Timothy C (Timothy)]

> From: Daniel H Neilson
> 
> > If you're using Python 2.3.x
> > 
> > for i, line in enumerate(file):
> >     if i % 100 == 0:
> >         action
> > 
> >     process(line)
> > 
> > Tim Delaney
> 
> Beautiful. Thanks to those who responded. DHN

Note that as Sean pointed out, you will need to add 1 before performing the modulo if you want the action to be performed on the 100th line. As the above stands, the action will be performed on lines [1, 101, 201, ...].

So the test should either be:

    if i % 100 == 99:

or

    if (i + 1) % 100 == 0:

which will give you the action on lines [100, 200, 300, ...].

Tim Delaney