CODE EXAMPLE FOR PYTHON

REMOVE ALL ROWS FROM DATFRAME WGICH HAS DATA OLDER THAN 3 MONTHS PANDAS

from datetime import date
from dateutil.relativedelta import relativedelta

#http://stackoverflow.com/questions/546321/how-do-i-calculate-the-date-six-months-from-the-current-date-using-the-datetime
six_months = date.today() - relativedelta( months = +6 )