003_002 Python 获取上一个周几，如周五，星期五

#encoding=utf-8

print '中国'

#获取上一个周几，如周五，星期五
import datetime, calendar

lastFriday = datetime.date.today()
oneday = datetime.timedelta(days = 1)

while lastFriday.weekday() != calendar.FRIDAY:
lastFriday -= oneday

print lastFriday.strftime('%A,%d-%b-%Y')