Not too long ago, I covered one use of python dateutil, on the blog here.
The library itself is pretty nifty in other case as well. In this case date difference. While python datetime module in the standard library, the datetime.timedelta is used to find difference in date, it counts up to the days. In my case, I want to count it to years.
That is where dateutil comes it. It have a module called, relativedelta. Which do actually count to years. To use it is a matter of import and use it
from dateutil.relativedelta import relativedelta
date_diff = relativedelta(date_from,date_to)
It as you can see does count up to years, also months. Which is useful if you wanted to find difference in date beyond just days.