weekNumber.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

from datetime import date, timedelta, datetime

def weekBoundaries(year, week):
  startOfYear=date(year,1,1)
  now=startOfYear + timedelta(weeks=week-1)
  sun=now-timedelta(days=now.isoweekday() % 7)
  weekdays=list()
  weekdays.append(sun.strftime("%Y%m%d"))
  weekdays.append((sun+timedelta(days=1)).strftime("%Y%m%d"))
  weekdays.append((sun+timedelta(days=2)).strftime("%Y%m%d"))
  weekdays.append((sun+timedelta(days=3)).strftime("%Y%m%d"))
  weekdays.append((sun+timedelta(days=4)).strftime("%Y%m%d"))
  weekdays.append((sun+timedelta(days=5)).strftime("%Y%m%d"))
  weekdays.append((sun+timedelta(days=6)).strftime("%Y%m%d"))
  return weekdays

dt=datetime.now()
year=dt.year
week=dt.isocalendar()[1]
weekdays=weekBoundaries(year,week)
print(weekdays)