import datetime
back10 = datetime.datetime.now() - datetime.timedelta(days=10) # 10 days ago
now = datetime.datetime.now() # now
# math
if back10 > now :
    print '%s is greater than %s' % (back10, now)
if back10 < now :
    print '%s is less than %s' % (back10, now)

#"10 days ago is less than now"