python get this week days and last week day maybe help for you

#!/usr/bin/env python
#encoding=utf-8
import datetime

def get_this_week_days(d=datetime.datetime.now()):
    d=d-datetime.timedelta(days=d.isoweekday()-1)
    day_begin=datetime.datetime(d.year,d.month,d.day,0,0,0)
    day_end=datetime.datetime(d.year,d.month,d.day,23,59,59)
    days=[(day_begin+datetime.timedelta(days=i),day_end+datetime.timedelta(days=i)) for i in xrange(0,7)]   
    print days
    return days

def get_last_week_days():
    d=datetime.datetime.now()-datetime.timedelta(days=7)

    return get_this_week_days(d)
   
get_last_week_days()