Python 3 Find Difference Between Two Dates in Years, Months, Days, Hours, Minutes & Seconds

import datetime
from dateutil.relativedelta import relativedelta

a = '2014-05-06 12:00:56'
b = '2013-03-06 16:08:22'

start = datetime.datetime.strptime(a, '%Y-%m-%d %H:%M:%S')
ends = datetime.datetime.strptime(b, '%Y-%m-%d %H:%M:%S')

diff = relativedelta(start, ends)

>>> print "The difference is %d year %d month %d days %d hours %d minutes" % (diff.years, diff.months, diff.days, diff.hours, diff.minutes)
The difference is 1 year 1 month 29 days 19 hours 52 minutes